Sudden Network Instability

Up until last week I had my home network configured in the way described below and it worked fine. Without any changes that I'm aware suddenly I'm having trouble staying connected to my ISP.
I have a dual band network:
A Time Capsule connected via ethernet to my ISP. I have it set to "create a wireless network" (n speed 5 GHz). I use DHCP and have it set to "share a public IP address". The network called "adibiase" is extended at the other end of the house by an Airport Extreme n with "Fast Ethernet".
Connected to the Airport Extreme/Fast Ethernet that extends the n network is an older domed Airport Extreme. I use it to broadcast a network called "gdibiase" at g speed. It's set to "participate in a WDS network" and has its connection sharing set to "Off (Bridge Mode)".
I access the n network with a MacBook Pro. My wife access the g network with a iBook G4.
This all worked great until the n network started losing it connection to my ISP. Sometimes it works....but frequently now doesn't. At these times I could switch over to the g network which interestingly gave me a pretty fast connection. In fact, at times I've been finding it more efficient to work on the g network....it's more reliable (doesn't drop out as much) and actually at times seems faster than the n network.
I'm sure my configurations are not the best. But for a few months they did seem to work flawlessly.
Any suggestions will be appreciated,
Allan

Similar Messages

WLC 2504 sudden network instability

Hello,
we're running a WLC 2504 with two SSIDs on it. It is connected to to a small PoE switch. Standard untagged vlan. A handfull APs connected to it. No DHCP, the APs have all static IP addresses.
All of a sudden we're having a number of issues with the network connection:
APs restarting
The APs restart every now and then reporting that their IP is being used by another device. Looking through the logs there are two MAC addresses that are reported as using the APs IP address. These two MAC addresses have unknown vendor IDs.
Warning: AP with Base Radio MAC f8:72:ea:7c:9d:e3 has found its IP Address 0.2.146.0 being used by a machine with MAC
Address 04:c6:f8:40:00:00 (The other mac that is reported is 04:cc:90:40:00:00)
AP 'AP5', MAC: 0c:68:03:dd:1b:80 disassociated previously due to Link Failure. Uptime: 4 days, 00 h 48 m 50 s . Reason: Capwap WTP Event request.
So: There are two MACs that use the IP addresses of 7 APs?!?! And there is no vendor to be found for these MACs?
Ping timouts on the webGUI and CLI
I have a ping running on the IP for managing the device. This is running fine for ages. As soon as I connect via webGUI or CLI I lose packets. Get timeouts etc. some packets get through some don't. More of the latter. So ping is fine but any other traffic seems to be impacted heavily.
What we have done for troubleshooting
Checked duplex/speed settings of the interfaces. Everything ok.
Connected to another switchport. Same.
Changed the IP address of the management port. Same.
Swapped places with a laptop with the same IP address --> Worked fine.
Plugged in a completely new device, installed the latest firmware (7.6) and uploaded the config from the other one. Same.
Restarted the default gateway for the subnet the controler is on.
So now we're at the end of our knowledge. It seems to be a non-physical network issue, but we're a small team and no one has changed anything they say :-/
Any ideas what we could check next?
Kat

Hello,
thanks for your suggestions. It's hard to find those two MAC addresses. As they seem to be virtual I cannot get a hint from the vendor ID. A show mac-address table on the switch the WLC is connected to doesn't show those two
I found an error in the WLC AP config. AP1 had the same IP as AP5 and a wrong netmask. I changed that. Unfortunately that doesn't solve our problem.
Here are some more messages from the WLC's log:
AP 'AP3', MAC: 0c:68:03:dd:34:00 disassociated previously due to Link Failure. Uptime: 4 days, 15 h 04 m 15 s . Reason: Capwap WTP Event request.
AP Disassociated. Base Radio MAC:0c:68:03:dd:34:00
AP's Interface:1(802.11a) Operation State Down: Base Radio MAC:0c:68:03:dd:34:00 Cause=Heartbeat Timeout Status:NA
AP 'AP3', MAC: 0c:68:03:dd:34:00 disassociated previously due to Link Failure. Uptime: 4 days, 15 h 00 m 45 s . Reason: Capwap WTP Event request.
RF Manager updated TxPower for Base Radio MAC: 0c:68:03:dd:34:00 and slotNo: 0. New Tx Power is: 2
AP's Interface:0(802.11b) Operation State Down: Base Radio MAC:0c:68:03:dd:16:e0 Cause=Max Retransmission Status:NA
IDS Signature attack detected. Signature Type: Standard, Name: Deauth flood, Description: Deauthentication flood, Track: per-signature, Detecting AP Name: AP7, Radio Type: 802.11b/g, Preced: 9, Hits: 500, Channel: 6, srcMac: C2:9F:DB:21:47:60
This is the sh run-config of our WLC including one AP:
>show run-config
System Inventory
NAME: "Chassis"    , DESCR: "Cisco 2500 Series Wireless LAN Controller"
PID: AIR-CT2504-K9, VID: V01, SN: PSZ17381EPZ
Burned-in MAC Address............................ 50:17:FF:27:12:80
Maximum number of APs supported.................. 15
System Information
Manufacturer's Name.............................. Cisco Systems Inc.
Product Name..................................... Cisco Controller
Product Version.................................. 7.4.110.0
Bootloader Version............................... 1.0.18
Field Recovery Image Version..................... 1.0.0
Firmware Version................................. PIC 16.0
Build Type....................................... DATA + WPS
System Name...................................... UK-BRI-WFAPC
System Location..................................
System Contact...................................
System ObjectID.................................. 1.3.6.1.4.1.9.1.1279
IP Address....................................... 172.17.128.12
Last Reset....................................... Power on reset
System Up Time................................... 4 days 0 hrs 46 mins 6 secs
System Timezone Location.........................
System Stats Realtime Interval................... 5
System Stats Normal Interval..................... 180
Configured Country............................... GB - United Kingdom
Operating Environment............................ Commercial (0 to 40 C)
Internal Temp Alarm Limits....................... 0 to 65 C
Internal Temperature............................. +20 C
External Temperature............................. +25 C
Fan Status....................................... 4000 rpm
State of 802.11b Network......................... Enabled
State of 802.11a Network......................... Enabled
Number of WLANs.................................. 3
Number of Active Clients......................... 6
Memory Current Usage............................. Unknown
Memory Average Usage............................. Unknown
CPU Current Usage................................ Unknown
CPU Average Usage................................ Unknown
Burned-in MAC Address............................ 50:17:FF:27:12:80
Maximum number of APs supported.................. 15
AP Bundle Information
Primary AP Image    Size
ap1g2            9568
ap3g1            11288
ap3g2            11196
ap801            7164
ap802            8568
c1130            5072
c1140            9416
c1250            6944
c1520            8044
c602i            3736
Secondary AP Image    Size
ap3g1            5792
ap801            5192
ap802            5232
c1100            3084
c1130            4964
c1140            4992
c1200            3364
c1240            4812
c1250            5504
c1310            3136
c1520            6404
c3201            4324
c602i            3716
Switch Configuration
802.3x Flow Control Mode......................... Disable
FIPS prerequisite features....................... Disabled
secret obfuscation............................... Enabled
Strong Password Check Features:
     case-check ...........Enabled
     consecutive-check ....Enabled
     default-check .......Enabled
     username-check ......Enabled
Network Information
RF-Network Name............................. RFGROUP
Web Mode.................................... Disable
Secure Web Mode............................. Enable
Secure Web Mode Cipher-Option High.......... Disable
Secure Web Mode Cipher-Option SSLv2......... Disable
Secure Web Mode RC4 Cipher Preference....... Disable
OCSP........................................ Disabled
OCSP responder URL..........................
Secure Shell (ssh).......................... Enable
Telnet...................................... Disable
Ethernet Multicast Forwarding............... Disable
Ethernet Broadcast Forwarding............... Disable
AP Multicast/Broadcast Mode................. Multicast   Address : 0.0.0.0
IGMP snooping............................... Disabled
IGMP timeout................................ 60 seconds
IGMP Query Interval......................... 20 seconds
MLD snooping................................ Disabled
MLD timeout................................. 60 seconds
MLD query interval.......................... 20 seconds
User Idle Timeout........................... 300 seconds
ARP Idle Timeout............................ 300 seconds
Cisco AP Default Master..................... Disable
AP Join Priority............................ Disable
Mgmt Via Wireless Interface................. Disable
Mgmt Via Dynamic Interface.................. Disable
Bridge MAC filter Config.................... Enable
Bridge Security Mode........................ EAP
Mesh Full Sector DFS........................ Enable
AP Fallback ................................ Enable
Web Auth CMCC Support ...................... Disabled
Web Auth Redirect Ports .................... 80
Web Auth Proxy Redirect ................... Disable
Web Auth Captive-Bypass   .................. Disable
Web Auth Secure Web ....................... Enable
Fast SSID Change ........................... Disabled
AP Discovery - NAT IP Only ................. Enabled
IP/MAC Addr Binding Check .................. Enabled
CCX-lite status ............................ Disable
oeap-600 dual-rlan-ports ................... Disable
oeap-600 local-network ..................... Enable
mDNS snooping............................... Disabled
mDNS Query Interval......................... 15 minutes
Port Summary
           STP   Admin   Physical   Physical   Link   Link
Pr Type   Stat   Mode     Mode      Status   Status Trap     POE
1 Normal Forw Enable Auto       1000 Full Up     Enable N/A
2 Normal Forw Enable Auto       100 Full   Up     Enable N/A
3 Normal Forw Enable Auto       1000 Full Up     Enable Enable (Power Off)
4 Normal Disa Enable Auto       Auto       Down   Enable Enable (Power Off)
AP Summary
Number of APs.................................... 7
Global AP User Name.............................. Not Configured
Global AP Dot1x User Name........................ Not Configured
AP Name             Slots AP Model              Ethernet MAC       Location          Port Country Priority
AP7                  2     AIR-CAP1602I-E-K9     f8:72:ea:e4:9a:81 default location 1        GB       1
AP1                  2     AIR-CAP1602I-E-K9     f8:72:ea:7c:9d:e3 default location 1        GB       1
AP3                  2     AIR-CAP1602I-E-K9     f8:72:ea:e4:9c:57 default location 1        GB       1
AP6                  2     AIR-CAP1602I-E-K9     f8:72:ea:e4:9a:90 default location 1        GB       1
AP2                  2     AIR-CAP1602I-E-K9     f8:72:ea:7c:9b:63 default location 1        GB       1
AP4                  2     AIR-CAP1602I-E-K9     f8:72:ea:e4:9a:9b default location 1        GB       1
AP5                  2     AIR-CAP1602I-E-K9     f8:72:ea:e4:9a:cb default location 1        GB       1
AP Tcp-Mss-Adjust Info
AP Name              TCP State MSS Size
AP7                  disabled   -
AP1                  disabled   -
AP3                  disabled   -
AP6                  disabled   -
AP2                  disabled   -
AP4                  disabled   -
AP5                  disabled   -
AP Location
Total Number of AP Groups........................ 0
Site Name........................................ default-group
Site Description.................................
NAS-identifier................................... UK-BRI-WFAPC
AP Operating Class............................... Not-configured
RF Profile
2.4 GHz band.....................................
5 GHz band.......................................
WLAN ID          Interface          Network Admission Control          Radio Policy
1               corporate            Disabled                          None
2               dirtynetwork         Disabled                          None
3               dirtynetwork         Disabled                          None
AP Name             Slots AP Model             Ethernet MAC       Location          Port Country Priority
AP7                  2     AIR-CAP1602I-E-K9    f8:72:ea:e4:9a:81 default location 1     GB       1
AP1                  2     AIR-CAP1602I-E-K9    f8:72:ea:7c:9d:e3 default location 1     GB       1
AP3                  2     AIR-CAP1602I-E-K9    f8:72:ea:e4:9c:57 default location 1     GB       1
AP6                  2     AIR-CAP1602I-E-K9    f8:72:ea:e4:9a:90 default location 1     GB       1
AP2                  2     AIR-CAP1602I-E-K9    f8:72:ea:7c:9b:63 default location 1     GB       1
AP4                  2     AIR-CAP1602I-E-K9    f8:
RF Profile
Number of RF Profiles............................ 0
Out Of Box State................................. Disabled
RF Profile Name                    Band     Description                         11n-client-only
AP Config
Cisco AP Identifier.............................. 15
Cisco AP Name.................................... AP7
Country code..................................... GB - United Kingdom
Regulatory Domain allowed by Country............. 802.11bg:-E     802.11a:-E
AP Country code..................
................ GB - United Kingdom
AP Regulatory Domain............................. -E
Switch Port Number .............................. 1
MAC Address...................................... f8:72:ea:e4:9a:81
IP Address Configuration......................... Static IP assigned
IP Address....................................... 172.17.128.24
IP NetMask....................................... 255.255.128.0
Gateway IP Addr.................................. 172.17.128.1
Domain...............
Name Server......................................
NAT External IP Address.......................... None
CAPWAP Path MTU.................................. 1485
Telnet State..................................... Disabled
Ssh State........................................ Disabled
Cisco AP Location................................ default location
Cisco AP Floor Label............................. 0
Cisco AP Group Name.............................. default-group
Primary Cisco Switch Name........................
Primary Cisco Switch IP Address.................. Not Configured
Secondary Cisco Switch Name......................
Secondary Cisco Switch IP Address................ Not Configured
Tertiary Cisco Switch Name.......................
Tertiary Cisco Switch IP Address................. Not Configured
Administrative State ............................ ADMIN_ENABLED
Operation State ....
............................. REGISTERED
Mirroring Mode .................................. Disabled
AP Mode ......................................... Local
Public Safety ................................... Disabled
AP SubMode ...................................... Not Configured
Remote AP Debug ................................. Disabled
Logging trap severity level ..................... informational
Logging syslog facility ..
....................... kern
S/W Version .................................... 7.4.110.0
Boot Version ................................... 15.2.2.0
Mini IOS Version ................................ 7.4.1.37
Stats Reporting Period .......................... 180
Stats Collection Mode ........................... normal
LED State........................................
Enabled
PoE Pre-Standard Switch.......................... Disabled
PoE Power Injector MAC Addr...................... Disabled
Power Type/Mode.................................. Power injector / Normal mode
Number Of Slots.................................. 2
AP Model......................................... AIR-CAP1602I-E-K9
AP Image...............................
.......... C1600-K9W8-M
IOS Version...................................... 15.2(2)JB2$
Reset Button..................................... Enabled
AP Serial Number................................. FGL1725W7F7
AP Certificate Type.............................. Manufacture Installed
AP User Mode..................................... AUTOMATIC
AP User Name..................................... Not Configured
AP Dot1x User Mode............................... Not Configured
AP Dot1x User Name............................... Not Configured
Cisco AP system loggi
ng host..................... 255.255.255.255
AP Up Time....................................... 3 days, 23 h 26 m 50 s
AP LWAPP Up Time................................. 0 days, 00 h 14 m 12 s
Join Date and Time............................... Tue Jan 28 18:11:43 2014
Join Taken Time.................................. 0 days, 00 h 11 m 41 s
Attributes for Slot 0
    Radio Type................................... RADIO_TYPE_80211n-2.4
    Administrative State ........................ ADMIN_ENABLED
    Operation State ............................. UP
    Radio Role .................................. ACCESS
    Radio Mode .................................. Local
    CellId ...................................... 0
    Station Configuration
      Configuration ............................. AU
TOMATIC
      Number Of WLANs ........................... 3
      Medium Occupancy Limit .................... 100
      CFP Period ................................ 4
      CFP MaxDuration ........................... 60
      BSSID ..................................... 0c:68:03:dd:16:e0
      Operation Rate Set
        1000 Kilo Bits........................... MANDATORY
        2000 Kilo Bits........................... MANDATORY
        5500 Kilo Bits........................... MANDATORY
        11000 Kilo Bits.......................... MANDATORY
        6000 Kilo Bits........................... SUPPORTED
        9000 Kilo Bits........................... SUPPORTED
        12000 Kilo Bits.......................... SUPPORTED
        18000 Kilo Bits.......................... SUPPORTED
        24000 Kilo Bits.......................... SUPPORTED
36000 Kilo Bits.......................... SUPPORTED
        48000 Kilo Bits.......................... SUPPORTED
        54000 Kilo Bits.......................... SUPPORTED
      MCS Set
        MCS 0.................................... SUPPORTED
        MCS 1.................................... SUPPORTED
        MCS 2.................................... SUPPORTED
        MCS 3.................................... SUPPORTED
        MCS 4.................................... SUPPORTED
        MCS 5.................................... SUPPORTED
        MCS 6.................................... SUPPORTED
        MCS 7.................................... SUPPORTED
        MCS 8.................................... SUPPORTED
        MCS 9.................................... SUPPORTED
        MCS 10................................... SUPPORTED
        MCS 11................................... SUPPORTED
        MCS 12..
................................. SUPPORTED
        MCS 13................................... SUPPORTED
        MCS 14................................... SUPPORTED
        MCS 15................................... SUPPORTED
        MCS 16................................... DISABLED
        MCS 17................................... DISABLED
        MCS 18................................... DISABLED
        MCS 19................................... DISABLED
        MCS 20................................... DISABLED
        MCS 21................................... DISABLED
        MCS 22................................... DISABLED
        MCS 23................................... DISABLED
      Beacon Period ............................. 100
      Fragmentation Threshold ................... 2346
      Multi Domain Capability Implemented ....... TRUE
      Multi Domain Capability Enabled ........... TRUE
      Country String ............................ GB
    Multi Domain Capability
      Configuration ............................. AUTOMATIC
      First Chan Num ............................ 1
      Number Of Channels ........................ 13
    MAC Operation Parameters
      Configuration ............................. AUTOMATIC
      Fragmentation Threshold ................... 2346
      Packet Retry Limit ........................ 64
    Tx Power
      Num Of Supported Power Levels ............. 4
      Tx Power Level 1 .......................... 16 dBm
      Tx Power Level 2 .......................... 13 dBm
      Tx Power Level 3 .......................... 10 dBm
      Tx Power Level 4 .......................... 7 dBm
      Tx Power Configuration .................... AUTOMATIC
      Current Tx Power Level .................... 3
      Tx Power Assigned By ...................... DTPC
    Phy OFDM parameters
      Configuration ............................. AUTOMATIC
      Current Channel ........................... 6
      Channel Assigned By ....................... DCA
      Extension Channel ......................... NONE
      Channel Width.............................. 20 Mhz
      Allowed Channel List....................... 1,2,3,4,5,6,7,8,9,10,11,12,
        ......................................... 13
      TI Threshold .............................. -50
      Legacy Tx Beamforming Configuration ....... CUSTOMIZED
      Legacy Tx Beamforming ..................... ENABLED
      Antenna Type............................... INTERNAL_ANTENNA
      Internal Antenna Gain (in .5 dBi units).... 8
      Diversity.................................. DIVERSITY_ENABLED
      802.11n Antennas
         A....................................... ENABLED
         B....................................... ENABLED
         C....................................... ENABLED
    Performance Profile Parameters
      Configuration ............................. AUTOMATIC
      Interference threshold..................... 10 %
      Noise threshold............................ -70 dBm
      RF utilization threshold................... 80 %
      Data-rate threshold........................ 1000000 bps
      Client threshold........................... 12 clients
      Coverage SNR threshold..................... 12 dB
      Coverage exception level................... 25 %
      Client minimum exception level............. 3 clients
    Rogue Containment Information
    Containment Count............................
    CleanAir Management Information
        CleanAir Capable......................... No
    Radio Extended Configurations
      Beacon period.............................. 100 milliseconds
      Beacon range............................... AUTO
      Multicast buffer........................... AUTO
      Multicast data-rate........................ AUTO
      RX SOP threshold........................... AUTO
      CCA threshold.............................. AUTO

Cross-platform network instability

I recently started a new job where everything is Apple, including the Airport Extreme. After investigating some to figure out how to configure the WEP key on both the Airport and my PC laptop, I was finally able to connect to the network.
Since then, however, the network has become unstable. The modem stays connected, but the Airport fails routinely - possibly releasing its DHCP settings. The failure doesn't seem to coincide with any operations, Mac or PC. My network/PC background is strong, but I never used Mac hardware prior to this week. As suggested by the Apple support page, I contacted our ISP and they reported no issues with 802.11-compatible wireless networks.
If anyone has suggestions, I'm all ears...

When you checked into the Extreme settings, did you use the Windows®
AirPort Utility (download from Support) or does someone else there admin
the base stations and keep it secure so as to not allow other non-admin
access? Friends and relatives who have PCs have no issues in connects
to my or other Apple AirPort Extreme Base Station networks.
If all the computers in the local wireless network use the 802.11/g setting
and the base station is set specifically for that (and not b/g) it should be
more stable and alot faster, but 802.11/b users would not have access.
There are several pages of AirPort Support documents; some are general,
a few apply to Windows & Mac users: http://www.apple.com/support/airport/
Hopefully someone with mixed platform experience will have a more direct
answer for you to check. Best of luck in this issue!
PS: Did you find an applicable software update for your PC
among these for working with AirPort base stations? There
are a few and maybe they are not needed; or they are.
http://docs.info.apple.com/article.html?artnum=75422

Sudden networked printer issues cropping up.

Thai has been happening recently for several network users connected to network printers via static IP setup. When someone sends something to the printer , it doesn’t automatically print. Either we have to open the side tray and add paper or press the “OK” button a couple of times to get it print from Tray 2 in the bottom. I have had had to go into Properties—Paper/Quality and select Tray 2. For some reason its default changed (all was fine until recently). Defaults wont stick.

Crud. Unfortunately I don't know too much about the print servers other than they're all or mostly Windows based. All these printers are connected through Ethernet, and need Windows Domain credentials to access (in Windows, you're normally just prompted).
One model is a Laser 8150dn (I think), which is one I have successfully set up by printing directly to it and bypassing the print server.
Another model is a Laserjet 4050 (on a different server, with the same issues), one's a Sharp copier of some sort (that also functions as a printer)-I think that's one that I CAN'T print to directly unfortunately, and I do use that to run off a bunch of printouts at once).
There's also a...shoot...Color Laserjet 4700 I think. It's Ethernet port is dead so it's hooked up directly through parallel to a regular XP Pro machine, just using normal sharing-I haven't been able to connect to it, though it was giving me somewhat different error messages than the rest (it at least prompted me for my credentials, which it wouldn't accept).
I was also planning on sharing an HP Desktop soon off of a regular Windows box, but now I'm wondering if my Macbook wouldn't be able to print to it if it's shared.

Watching DVDs on network, also network instability

I have DVD's backed up to an external HD connected to my AE(dual). Shouldn't that have enough bandwidth to watch these backups directly over the network on my MBP? Performance is stuttery and sluggish.
Any other experiences?
In general I have a big problem with network consistency. My throughput can be as good as a sustained 7mbs, but very often, quickly drops to under 100kps. It averages about 500kps. Rebooting, resetting network components often gets it back up, shortly. Sometimes it just goes out completely and no devices are visible in Airport Utility. These need devices unplugged.
Tried various channels, bought a new non-interfering cordless phone, tried only using some components. Always the same result.
Any advice on this one?

Allen Sibley wrote:
... Shouldn't that have enough bandwidth to watch these backups directly over the network on my MBP?
If you're talking about your wireless network the answer is no. The data rate required for watching DVDs varies, but MPEG-2 compression results in a bit rate pretty close to 7 Mb/s. The overhead for transmitting it wirelessly will require more. Forget about HD video.
You're definitely pushing the limit of your wireless network. I would not expect to successfully stream anything other than low quality video over any wireless network. A wired network is a different story altogether - connecting your MBP to the Extreme via Ethernet ought to be acceptable for streaming video.

Lesson Learned: Extreme Network Instability Root C...

I was having a massive amount of network stability issues with a replacement E7-00 (previous was broken) which did not have Anna--the one I replaced did have Anna. My assumption was that the lack of update was the root cause, but after discovering yesterday that I couldn't use the web on my cellular network at all, I was forced to do a hard reset.
After doing the hard reset all my Wifi and 3G/3.5G stability and issues were gone. I did not do the restore and instead have put everything back manually. This has been much more stable.
So I hope this saves someone else some misery and hours on the phone with support.

I had the same issue, hope this work for you too.
Make a file in /etc/X11/xorg.conf.d/ called 50-device.conf with this:
Section "Device"
Identifier "Default Device"
Driver "radeon"
Option "MigrationHeuristic" "greedy"
Option "SwapbuffersWait" "off"
Option "ColorTiling" "on"
Option "ColorTiling2D" "on"
Option "EnablePageFlip" "on"
Option "AccelDFS" "on"
Option "XV_VSYNC" "on"
#Option "AccelMethod" "glamor"
Option "AccelMethod" "EXA"
EndSection
Seems to be a problem with glamor

WRT610N Wired Network Instability

Every day I have to power cycle my router at least once.
I keep seeing frequent disconnects from my network both wired and wireless. What really doesn't make sense is that sometimes I lose connection from my network, but still I'm downloading from the internet.
Network Magic pops up saying I have lost connection from my network, and then 30 seconds later it pops saying it's connected again. This cycle happens at least 10 times per day, that I've noticed.
Is there a setting I can change that might make my connections more stable?

On your Router setup page change the MTU size to 1350 and click on Save Settings.... Then click on the wireless tab and below change the Wireless Channel to 11 and let the wireless ssid broadcast should be enable and click on Save Settings.... Then clik on the advance wireless settings and below change the Change the Beacon Interval to 75,Change the Fragmentation Threshold to 2304,Change the RTS Threshold to 2304 and Click on Save Settings...
Now see if you can locate your Wireless Network and attempt to connect...
If still the same problem then you can try to update the firmware on your Router. Once the firmware on your router is updated then you need to reset your router and re-configure all the settings on your router from scratch.

Sudden network problem

Not sure where to post this. I have 2 MacBook Pro, 1 iMac, an iPad and an iPhone. Run everything through my Verizon wireless router. Never had a problem until today. I cannot access the weight watchers website on any of my devices. All other websites work fine. I can use my iPhone to access it if I turn off my wireless data. It's got to be a problem with the router. I spent an hour on the phone with my ISP provider. I rebooted the router and the modem, flushed the DNS cache, reset Safari and nothing is working. It is specific to this particular website. Has anyone heard of this problem? I can google and see where people have had a similar issue but I'm not sure how to fix it. I read something about hard coding the sites IP address into the router but I'm not sure how to do this.
Anybody got a suggestion?

jmanfre wrote:
Not sure where to post this.
How about Weight Watchers Technical troubleshooting forum area.

Sudden network drop in iphone 4 on airtel haryana

I am facing this problem since i purchased iphone 4 in last september. Can anybody help me on it, i have updated with latest version even then same issues coming.

I had been holding off downloading iOS 6 ever since it was released and today was to be the day... no more.
Thank you for the warning!

All of a sudden, unable to connect to internet

I can get on the net, but after a while I get the message that I can't connect. I click on network diagnostics and the problem resolves itself. All is good for a bit but then suddenly the issue arises again. I may go for a few days without this issue cropping up, but then it may happen 3 times during a surfing session. This issue has only recently started happening. I know this description is vague, but any ideas? Thanks.

If your connection is Ethernet, and Network Diagnostics is flagging Ethernet and everything else all-red, check and make sure that the connecting cable isn't nicked or pinched and that the cable ends aren't loose (try jiggling them near the connector or gently pulling and see if the network connection goes up and down (flashes red or green on Ethernet status indicator on left side of Network Diagnostics) with your jiggling/tugging. If it does, replace the cable. The cable should never pull out the port without clicking the unlocking tab on the connector. Often this tab is bent and ineffective at locking the cable into the port firmly or is broken off. In either of those cases, replace the cable.
If your connection is AirPort, make sure you don't have a boat-load of too many competing networks operating in proximity of the computer. A symptom of this is the number of networks viewable by AirPort from the menu bar. Confirming collaborating info is when the alt key + menu drop down shows your airport speed keeps changing every time you click it up. If your connection is truly stable, speed changes will be rare or never and should be close to theoretical maximums for the class of WiFi connections you setup (B= ~12 Mbps max, G= ~56 Mbps max, etc).. You I recently was forced to wire my connections to the AirPort Extreme hub I use because there are like 8-11 networks popping up any time I check using the menu bar Airport status menu drop down (use it with alt key held for a LOT more useful info including signal strengths and throughput speeds). If there are too many competing networks, the chaos caused by all of the various networks with automated settings for rolling channels when they find too much signal interference causes a cascade of network instability for all of the networks as they each keep changing channels to try avoiding each other and everyone's network connections start suffering or collapsing as a result. If you have a wireless issue like this and don't want the tether of a wired connection, consider talking to your neighbors about changing all of their wireless settings off of automated channel selections and sit down and everyone decide to pick a particular channel and stick with it so everyone's network connections can remain stable and usable until the next idiot ads a new WiFi network again and everything starts collapsing as his network starts stomping on everyone else's channels looking for a less busy one... Did I say wireless *****?
If Network Diagnostics tells you that ONLY the ISP, Internet and/or server connection is failing, look further upstream at your connection from your home or office to the net ISP itself. If it is a phone company DSL connection, consider getting a more reliable service like FiOS or Cable modem if available as DSL is notoriously unreliable and may go down frequently / randomly if you are any good distance from the phone company switching office in your locale. Cable and FiOS are generally very stable connections with FiOS being the most stable and fastest of all connection types available to consumers. If it is the Server only that is failing, that can also be a problem at your ISP which your only resort is to switch ISPs if they are so incapable of providing reliable service....
The only other problem can be using too many net-connected applications at once with wrong settings for throttling in the apps. When I had cable modem service, I used to cripple my household network so no computers could load anything if I used a fast Mac running a bit torrent client and failed to throttle the upload speeds of the app. It would saturate the upload link, then all the other Macs weren't able to get through their URL requests uploaded to receive webpages back because their URL queries simply got drowned out by the sheer volume of data being pumped out by the bit torrent software and a lack of bandwidth available to get out further data. Lesson here: Watch your upload speeds if you start having trouble with download speeds.

Time capsule not working as wireless base station suddenly

I have been using my time capsule as base station for wireless network in our house for some time and suddenly network is not working for all wireless devices in the house. Desktop imac is connected to internet via ethernet cable through time capsule and works fine so I know problem is not with cable modem or signal coming to house. Laptops appear to be connected to my network fine but when attempting to connect any site through safari or firefox I just get the spinning wheel thingy.

Check that the laptops are getting DNS and router (gateway) from the TC.. if not reset it and do the setup again.
What OS are you actually running on the laptops.. this problem started with Lion and is much worse in ML.. it is actually not a Snow Leopard issue which you list as the OS.

TS4148 on my iphone network loosing and no service appears .what can be the reason

hello
on 2g network selected condition all of sudden network signal missing and no service displays .what can be reason please

i have an iphone 5 its practically new and after a week or so i am using my iphone and suddenly from nowwhere a purple spot comes out on the bottom right corner of my screen i havent dropped it or anything can someone help me????

Network Magic thinks wireless router is wired.

Please tell me how to correct this issue. Network Magic sees my wiresless d-Link router (DIR-601) as a wired network. I have checked the router settings and everything says wireless. How can I correct this? thanks?

shaunpcoleman wrote:
Network Magic Version: 5.5.9195.-Pure0
Platform Version: 11.2.9195.1
O/S: Windows 7 Pro SP1
Router: D-Link DIR-655 ver 1.32
Switch: D-Link Green DGS-1008D
I turned on my computer today and all of a sudden Network Magic thinks that my computer is on a new network! It is NOT on a new network. I did some reading and it says that on the Network Map screen there should be something to click on to make your current network your home network - I see nothing.
So, how do you make your current network your home network when Network Magic thinks it isn't?
Hi shaunpcoleman,
How are you connecting to the Router? Wired or Wireless?
thecreator - Running Network Magic version -5.5..9195.0-Pure0 on Windows XP Home Edition SP 3
Running Network Magic version -5.5.9195.0-Pure0 on Wireless Computer with McAfee Personal Firewall Build 11.5.131 Wireless Computer has D-Link DWA-552 connecting to D-Link DIR-655 A3 Router.

DB upgrade error

Hi,
I have a wierd problem.
I had ERP04 on Oracle 9.2.0.6. We are going to ERP05
So i was upgrading my DB to 10.2.0.2
I had completed all the prerequisites, installed 10.0.0.1 and upgraded to patch 10.0.0.2 according to DB upgrade guide.
I was running DBUA, it was upgrading and was around 10-12% complete.
Then suddenly network broke for a min or 2. And DBUA screen went off.
When I am starting to restart DBUA, it is working.
I changed again name back to my old DB in /etc/oratab.
Old DB is getting mounted but not getting opened.
My trace file under /oracle/RD1/saptrace/usertrace gives the below listed error
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01406: fetched column value was truncated
And alert log files says that there was an error shown in trace file above.
Is there anything i can do to solve this?
Regards,
Tajinder

Hello Tajinder,
> Is there anything i can do to solve this?
Unfortunately not. This problem is described in metalink note #427585.1.
Solution: Restore a cold backup of the database from before the upgrade attempt was made and then reaccomplish the upgrade
I had this issue once. Also restored the database and restarted.
Regards
Stefan

Design Time Connection of SAP Server failure using TIBCO Designer

Hi All,
While Connection to SAP Server using TIBCO Designer using Design Connection Configuration followed error we are facing.
Connection Error. Unable to Create a Connection with the target application bdhn4973.na.pg.com using connection parameters
programID=BWAH-IFS-L6A430 gatewayService=sapgw00 and the target application error is 102RFC_ERROR_COMMUNICATIONConnect to SAP gateway failedConnect_PM TPNAME=BWAH-IFS-L6A430, GWHOST=bhdn4973.na.pg.com, GWSERV=3300LOCATION CPIC (TCP/IP) on local ost with Unicode ERROR partner 'bdhn4973.na.pg.com:3300' not reached TIME Mon Jul 18 03:28:21 2011 RELEASE 720 COMPONENT NI (network interface) VERSION 40RC - 10 MODULE nixxi.cppLINE 3284DETAIL NiPConnect2: 155.125.167.58:3300SYSTEM CALL connectERRNO 239 ERRNO TEXT Connection refusedCOUNTER 6
Note: SAP Server is running but still we are not able to connect from TIBCO Designer. Few times it's able to connect and few time it will throw an error while connecting to SAP Server.
Can you please help me if any one you have any idea regarding this.
Regards,
Vijaya

Hi,
Since you are able to connect, seems the issue with network instability.
1) Create an RFC connection and perform the connection test. Note down the time taken (milli seconds), a notable delay also can be the cause of the issue.
2) Do the ping from Tibco system to SAP and note down the time taken
3)Also check the firewalls in between the two systems and check the valid access
You may need Nework admin teams help to cross check these.
Regards,
Syed

Sudden Network Instability

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