Ping problems between wired/wireless

I have 2 workstations connected to a wrt54g router setup as a gateway. This is a home network. bigserver and aclient both have fedora core 6 installed. bigserver is connected via a wire and aclient is using wireless. Both have internet access and can ping the router, 192.168.1.1. aclient can ping bigserver and ssh to it. bigserver cannot ping aclient and gets a host unreachable. I also have an xp laptop, using wireless that has internet access, that can ping the the router, bigserver but cannot ping aclient. None of the others can ping the laptop either. Is there some setting in the linksys that causes problems between systems that are wired and others that are using the wireless? Thanks for the help.

Hi… logon to router’s setup page, try changing wireless channel to 1 or 11, go to advanced wireless settings reduce beacon interval to 50, fragmentation and RTS threshold to 2304, change Transmission rate to 54 MBps…try disabling personal firewall on wireless computer, if you've installed any...check whether it makes any difference or not.

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Voice over IP Roaming problems between 2 Wireless Lan Controllers.

Hello,
we have problems with Voice over IP roaming between 2 Wireless Lan Controllers, this problem is not always happening. I have attached the detailed configuration. We are using LWAPP 1242 & WLC 2106 Controllers.
The phones they are using are Siemens Enterprise optiPoint WL2.
Is there maybe something wrong with the configuration our can I try some different settings?
Regards,
Jordy Broekhuizen

When a wireless client associates and authenticates to a WLC, it places an entry for that client in its client database. This entry includes the MAC and IP addresses of the client, security context and associations, quality of service (QoS) contexts, the WLAN, and the associated LAP. When a client roams to another LAP associated to the same WLC, it just updates the client database with the new LAP information so that the data can be forwarded appropriately to the client. When a client roams to a LAP associated with a different WLC, either in same or different subnets, it sends the information in the client database to the new WLC. This helps client to retain its IP address across roams and maintain uninterrupted TCP sessions. For more information on roaming in the WLC environment.
For the further description following URL for the WLC may help you
http://www.cisco.com/en/US/docs/wireless/controller/5.1/configuration/guide/c51ovrv.html

Problems between a Wireless Controller and a Switch.

I have a Wireless Controller 4402 connected to one sw2960G.
I configured the controller with LAG and the switch (sw2960G) with etherchanel.
I connected the controller 2 distribution ports to the 2 ports of the switch (configured with etherchanel).
It worked like it should work.
But the problem is like this: if I take one cable that is connected to the switch and unplugged that cable from the switch (if that cable is the one connected to controllers port one) I have connectivity between both machines.
If I plug in the switch the cable connected to controller port one and take the other cable and unplugged that cable from the switch I stop the connectivity between the two machines.
I think that was not supposed to happenâ¦ because the LAG in the controller should put every AP in the second controller's port, and the connectivity between the machines should not end.
Can any one help me?
Can any one tell me what I am doing wrong?
Thanks in advance,
Rui

With LAG enabled in the controller I think I can have only one ap-manager interface.
The LAG will (it is supposed to) do the load balance automatically.
I mean, if one of the interfaces is âdownâ the other will have to coupe with all the AP's.
I should have always connection between the controller and the switch.
The STP of the controller is configured by default (STP Mode = OFF).
In the case of etherchannel load balanceâ¦ I saw the Cisco documentation and I did not saw any thing about that. I think that The LAG as to do that for the controllerâ¦ I'm right about that?
I will see the link that you advisedâ¦
Can you help me?
Thanks,
Rui

Airport Express Problem with Wired/Wireless networks simultaneously

Hello,
I'm having trouble maintaining a connection with my AX (2012) in a work environment. Basically, I have a Win 7 laptop connected via ethernet to the internet/corporate net. I have configured the AX to create a separate wifi network that does not connect to the internet. In order to connect to the AX, I have to disable both the Ethernet adapter and the WLAN adapter, enable the WLAN adapter, connect it to the AX's network, and wait for it to show up in the utility. Only then can I re-enable the ethernet adapter for internet access. Then, inevitably, the connection dies within 15 minutes and I have to repeat the whole process.
Can anyone tell me what's going on here? Is the wired network interfering with the wireless network? Is something configured wrong? Below is the output from ipconfig/all, if that helps. The AX is configured with a 169.254 range. IP address and behaves the same way whether the IP address is auto or manual, and there is no difference if the signal roams channels or is fixed to a single channel (I've played with them all).
Thanks in advance for your help.
Wireless LAN adapter Wireless Network Connection:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : DW1501 Wireless-N WLAN Half-Mini Card
   Physical Address. . . . . . . . . : 68-A3-C4-0C-CE-5B
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 10.0.1.2(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Thursday, December 06, 2012 2:32:22 PM
   Lease Expires . . . . . . . . . . : Friday, December 07, 2012 2:41:43 PM
   Default Gateway . . . . . . . . . : 10.0.1.1
   DHCP Server . . . . . . . . . . . : 10.0.1.1
   DNS Servers . . . . . . . . . . . : 10.0.1.1
   NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection:
   Connection-specific DNS Suffix . : XXX.com
   Description . . . . . . . . . . . : Intel(R) 82577LM Gigabit Network Connecti
on
   Physical Address. . . . . . . . . : 5C-26-0A-40-37-A9
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 3.197.129.227(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.254.0
   Lease Obtained. . . . . . . . . . : Thursday, December 06, 2012 2:42:43 PM
   Lease Expires . . . . . . . . . . : Thursday, December 13, 2012 2:42:42 PM
   Default Gateway . . . . . . . . . : 3.197.128.1
   DHCP Server . . . . . . . . . . . : 3.156.134.20
   DNS Servers . . . . . . . . . . . : 3.156.130.30
3.156.130.130
3.23.190.40
                                       3.23.192.43
   Primary WINS Server . . . . . . . : 3.156.130.30
   Secondary WINS Server . . . . . . : 3.156.130.130
   NetBIOS over Tcpip. . . . . . . . : Enabled

Here goes - read this through completely and see if it makes sense:
1. Reset the Express to factory settings by unplugging it and plugging it back in while holding in the reset button - release the button when the light starts blinking - then wait for the light to blink slowly indicating factory default.
2. Disable the wireless and enable the ethernet on the laptop and connect an ethernet cable to the WAN port (the circle of dots) of the Express and use the AU toset it up in bridge mode to create a wireless network with a name of your choice - you don't really need a password but you can assign one if you wish - if you do not use a password you will have to choose to ignore the error message for no security.
3. Accept all other defaults and ignore any messages about not having an internet or ethernet connection and update or finish the setup - if you get a blinking amber light, open the AU and correct any error messages.
4. You can now disconnect the ethernet cable and disable the ethernet on the laptop and enable the wireless so you can stream iTunes to the Express - the laptop must stay wireless to do this - you can not accesss both at the same time - you can also use an iPhone or iPad or iPod to use Airplay and then you can use the laptop via ethernet for the internet.
5. To access the Express from now on, you have to use the AU wirelessly from the laptop.
The above is assuming that you don't currently have wireless in your office - the other alternatives are:
1. To hardwire the Express and have it create a wireless network and access the internet - you could then use your laptop wirelessly or wired to connect to the Express and use Airplay and your pc at the same time.
2. If your office has wireless, you can set up the Express to "join" the existing network - you can then do the same as in number 1.
I hope this helps - everyone's situation is different - the above scenarios work for me - you might have to do some tweaks but the info is there - let me know if you have any questions.

Wireless latency/slow ping problems in Snow Leopard

After upgrading to Snow Leopard (SR MBP), I've experienced unusually high and unpredictable latency from the airport connection. The Ethernet connection works fine (consistent and short ping times to the wireless router), but the airport connection's ping times vary wildly. My computer is within a few feet of the router and a computer running 10.5.8 further away has no such difficulty. See example: http://img.photobucket.com/albums/v404/amusiccale/Screenshot2009-09-05at101600AM .png
Running Ubuntu from a live CD, no such ping problem exists and the wireless connection works great, immediately out of the 'box': http://img.photobucket.com/albums/v404/amusiccale/Screenshot.png
Likewise, the problem does not appear from the Snow Leopard installation cd when I run network utility.
A different MBP (unibody) on Leopard does not have this problem with the same router (so it seems unlikely that the router is at fault), and I did not have this problem before my upgrading.
I have attempted deleting preference files for the wireless adapter without success. I have reinstalled snow leopard in place, making me wonder if the issue is the design/driver rather than an installation issue.
Programs I was able to use before in Leopard (such as Skype) that require a steady stream of information are now unusable.
How can I fix this issue?

amusiccale wrote:
Problem was an issue with Undercover 3.1; 3.2 release seems to solve it.
Thank you!
This solved the issue I was having here:
http://discussions.apple.com/message.jspa?messageID=10330767#10330767

NetworkManager - switching between wired and wireless

Hello!
I’ve set up a new laptop with Arch and now have a question concerning NetworkManager. Is it possible in NM to switch between wired and wireless connections like it is with Connman (https://wiki.archlinux.org/index.php/Co … d_wireless)?
So far it appears that NM only disables the wired connection when wireless is used but keeps the wireless alive when switching to wired.
I have already looked for a corresponding configuration but couldn’t find anything that helps.
Thanks in advance.

Easy Mode:
You can install the tlp-rdw package and edit the /etc/default/tlp configuration file which has an option that does that.
Hard Mode:
If you don't want to install a package and its dependencies, you can write your own script and put it in /etc/NetworkManager/dispatcher.d and have the NetworkManager dispatcher hook run the script (which is actually what tlp-rdw does but you don't have to install the tlp package as a dependency)
Note: tlp is a power manager and if you have any other power managers installed it might conflict with them so be wary of that.
Here is the wiki page on tlp https://wiki.archlinux.org/index.php/Tlp
Last edited by fungle (2014-08-05 23:05:00)

Intermittent NW problems wired/wireless

Hi,
My iMac experiences some intermittent NW problems.
Configuration:
iMac is connected (wired) to a USR router which is on its turn connected to my ADSL modem/router.
Symptoms:
Every now and then (couple of time per day) I'm not able to access the Internet. The internal NW is still OK: I can access both of my routers. When this happens I see that iStat Pro shows that the External IP is being updated. Which is strange, because my laptop which is connected to the same USR router is still able to continue to access the Internet at the same time. So no problem with the external IP address. I checked the modem/router at the time of the drop-out, but that was fine.
I tried using the same UTP cable to connect my laptop iso iMac, still no problem. I tried it connecting the iMac wireless to my router, still the same issue.
I returned the iMac to the service center for having it analyzed, but as expected they didn't experience any issue.
Is there anybody else with the same problem? At first I thought it would be a faulty NW i/f or driver, but as it happens with both the wired/wireless i/f I should think of something else.
Thanks.

Hi Gringeiro,
Are you using WEP or WPA wireless security on your router? I would recommend WPA2 with AES, well, if you want to connect it wirelessly. Also, it will help if you set a static IP address on the printer. You can do this by typing the printer's IP address into the address bar of your browser. Select the Network tab, then look for IPV4 under the Wired or Wireless section, depending upon how you have it connected. There should be an option to "Suggest Manual IP". If not, type IPCONFIG from the command prompt (Start/Run cmd) to get your Subnet and Gateway addresses.
If I have solved your issue, please feel free to provide kudos and make sure you mark this thread as solution provided.
Although I work for HP, my posts and replies are my own opinion and not those of HP.

WRT54G2 v1 - Substantial Speed Difference Between Wired and Wireless Connection

Hi everyone,
I have a WRT54G2 v.1 router connected to an RCN Cable Modem. My download transfer rate direct from the cable modem is 18 Mbps. Thankfully, I can get the same download rate when I plug my laptop into a wired ethernet connection from the router. However, the wireless connection only gets a download rate of 0.8Mbps. Also, my wireless card is pretty new (Intel 4965AGN) and has the latest driver (I can get far higher download rates at mobile hotspots, for instance). Here is what I've tried with the router:
- I've upgraded the router firmware to the latest build (Version 1.0.04, 07/08/2009).
- I've tried multiple channels on the network (1, 6, 11).
- I use WPA Security.
- Upon advice from the Linksys live chat support, I've changed the MTU settings to manual and set them to 1300.
- They also recommended that I change the following settings: “RTS Threshold” – 2304 “Fragmentation Threshold” – 2304 “Beacon Interval” – 50
- And of course: I've got my own SSID. The router is 5 feet off the ground. There are no other wireless devices that would cause interference. The router is not near large metal objects, fish tanks, or any other physical obstruction.
Is there anything else I can do? Thank you so much in advance for reading. I really appreciate it.

Also, is there anything to the fact that only the download rate seems to change?
Wired:
Wireless:

WRT54G v.6 loses wired/wireless connection after 2 hours

I have been trying for two weeks to get my router to maintain connection to both my wired and wireless computers. It drops after 2 hours. It says it is connected but I can't get anywhere. I have DSL with a static address. I put the static IP on the router and have the router DHCPing to the others. Have "live chatted" with Lynksys 4 different times with no luck. Based on live-chat advice, I have updated the firmware to 1.01, and changed the MTU from 1500 to various other numbers with no positive results. Both computers drop at the same time. If I take the router out of the loop and plug straight into the DSL modem, it stays up forever. I run XP home on my wired computer and XP Pro on my wireless laptop. I am at my wits end and would appreciate any help that you can offer.

It didn't like that either! I got to thinking about how it said that I was still connected but I couldn't get anywhere so I called my ISP today and had them double check my connection. The technician said that I was having abnormally high errors rates going out of my dsl (new, had it replaced recently) modem. He had me reset the modem, then reset the router, update my DNS numbers.......same thing, about 2 hours later, DROP! I have about decided that it is a problem between my dsl modem and router instead of my router and computers. For one thing, I reset everything during my lunch break. Back at work, right after lunch, I could ping my static IP on my router but, sure enough 2 hours later, I couldn't ping it despite my ISP saying I was connected. That leads me to believe my router doesn't like my modem or vice versa! Any other suggestions?

SRP527W-U --- No multicasts between wired & WiFi ??

I've just received a new SRP527W-U-E-K9 router to replace an old D-link router. However Apple IOS devices are not discoverable by iTunes on a Windows PC. The PC is connected to SRP527 by wired ethernet. All IOS devices are on the same SSID and the same VLAN as the wired ethernet devices.
I have been reading on several other threads in this site about this exact same problem. The fault was that multicast broadcasts were not being forwarded between wired ethernet and WiFi on the same vlan. See this thread.
https://supportforums.cisco.com/thread/2059353
The fault in thie above thread was resolved by a firmware update MR3 (v1.1.19) last year however it appears that the SRP527W-U has slightly different firmware to this version.
The configuration of my SRP527 is the same as the original poster's config in the above thread.
Setup:
WinXP SR3 running iTunes and Bonjour service - connected by ethernet to SRP
MacOSX Mac-mini- connected - connected by ethernet to SRP
4x IOS wireless clients (iPhones and iPads) on same SSID
IGMP v.2 enabled with proxy and immediate leave enabled.
Intervlan routing enabled
RIP disabled
ADSL port disabled
Ethernet Port 4 = WAN
From each IOS device (iPhone or iPad), I can see all other IP devices on the VLAN, but IOS devices are not discoverable on iTunes via Bonjour.
The version information of my SRP is embedded below. As it is brand new, I assume that it is the most recent firmware, so I would have assumed that the bug which was resolved in the above thread above would be incorporated in this firmware version.
Model:
SRP527W, ADSL2+ AnnexA, 802.11n ETSI, 2FXS/1FXO
Version ID:
V01
Hardware Version:
4.1.0
Boot Version:
1.1.22 (Feb 22 2011 - 09:42:55)
Firmware Version:
1.2.4 (003) Jan 11 2012
Recovery Firmware:
1.02.02 (009)
Current Time:
Mon, 22 Oct 2012 19:50:23
Wireless:
1 SSID Enabled
Is Cisco aware of this problem and is there any other firmware that I can load onto my model of SRP to resolve this?
Many thanks,
Paul

Update - Problem solved.
I spent a good part of the day testing my network. I installed Wireshark network analyzer on the Win XP box running iTunes, and discovered that mDNS broadcasts WERE in fact being broadcast between WiFi & wired ethernet ports. It was iTunes that was just failing to acknowledge the IOS devices by listing their presence. I even reinstalled the old D-link router and iTunes still failed to detect the presence of the IOS devices.
The problem with iTunes was resolved by stopping, waiting then restarting the services "Bonjour Service" and "Apple Mobile Device". I tried restarting bonjour in isolation but that didn't seem to work.
Sent from Cisco Technical Support iPad App

HELP: MacBook cannot get IP from DHCP wired/wireless

Hi, everyone.
I recently bought a TP-LINK TL-WR340G route and added it into my home network.
My iBook and PCs are albe to connect to network and internet, but my MacBook even cannot get a IP from the DHCP. I tried both wired & wireless connection.
I've tried to give my MacBook a static IP address, after that it can ping to the gateway and other devices on the network, and the DNS is working fine. But the MacBook just cannot connect to internet.
My MacBook can connect to internet at my office and my relative's house.
Please help to fix the problem. Thanks a lot.

What is the device type?
I have seen this with 4 android 5 devices. I think its something to due with misconfig on android and mfp settings. Although I'm not sure why I have hundreds of other android 5 devices working ok. I see this same when I debug one of the devices that is stuck in DHCP_REQ
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 Processing RSN IE type 48, length 20 for mobile ac:cf:23:41:bb:76
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 Received 802.11i PSK key management suite, enabling Authentication
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 RSN Capabilities: 0
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 apfValidateDot11iCapabilities:1286 Received RSNIE with Capabilities with STA MFPC: 0, STA MFPR:0, & AP MFPC:0MFPR:0
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 Marking Mobile as non-11w Capable
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 apfValidateDot11wGroupMgmtCipher:1716, Received NULL 11w Group Mgmt Cipher Suite for STA, hence returning
*apfMsConnTask_4: Mar 18 10:20:11.346: ac:cf:23:41:bb:76 pemApfDeleteMobileStation2: APF_MS_PEM_WAIT_L2_AUTH_COMPLETE = 0.
*apfMsConnTask_4: Mar 18 10:20:11.347: ac:cf:23:41:bb:76 0.0.0.0 DHCP_REQD (7) Deleted mobile LWAPP rule on AP [64:d9:89:47:fb:d0]
*pemReceiveTask: Mar 18 10:20:11.347: ac:cf:23:41:bb:76 0.0.0.0 Removed NPU entry.
Here is some links with more info about possible mfp issues
http://forum.xda-developers.com/google-nexus-5/help/android-5-0-wlan-bug-peap-maschapv2-t2938281/page4
http://www.reddit.com/r/Nexus5/comments/2pdv2y/wifi_authentication_issues_with_nexus_5_after/
https://code.google.com/p/android/issues/detail?id=78702  comments 30,39,52,53,78
http://w1.fi/cgit/hostap/commit/?id=9f6a7cddc42811883d6035032854089475f2fc65

Ping problem in the neighborhood and Msan can see the mac address of router

Hi everyone
i have a router 1941/K9 with card EHWIC-4SHDSL-EA ,i have configure this card in my router , the problem is I can not ping the ip @ Neighbourhood and the MSAN can't also see the mac-address of the router do you notice that the interface in the MSAN and in the router is UP / UP
anybody help me

Hi,
An ethernet interface will be always up/up and it goes down only if there is problem between the given port and the connected one. The issue can be anywhere else in the middle.

Good external HD? Also, problems with wired TM use?

I have a multi part question here:
I recently got a new MBP and I want to get an external hard drive to use with Time Machine. Is there any sort of consensus on which external hard drives generally work well? I have a 500 GB Western Digital MyBook that has been a constant source of problems. I frequently am unable to eject it and have had to use Disk Utility many times just to get my (old Powerbook G4) computer to see it. I really don't want to get another WD product. Are there any consistently good products out there?
Also, I've just been perusing this forum. I see many people suffering with Snow Leopard and TM using wireless backup. Have there also been many problems with wired backups? I don't use wireless at home, which is where I will keep my TM backups.
Finally, I move my computer around a lot so I won't have it plugged into its TM drive most of the time. I plan on plugging it in each evening before I go to sleep. Is that an appropriate method of using TM?

Pondini wrote:
That's why I'd recommend backing-up more often, but if you don't, another app may be better.
CCC or SD are most often used to make full "bootable clones." When your hard drive fails (and
they all do, sooner or later), you can boot and run from them immediately; with TM, you need to
have the disk replaced (or have another external) to restore your system to.
If anyone is going to take action based on the advice above (or other suggestions) they will need to recognize there is a different set of risks.
When you make a clone of a machine you end up with a clone and you can boot from it.
If you then make a fresh clone a day later you really need to have a different disk around or you are taking a lot of risk. The process of creating the new clone might fail. If it does and you do not have a second drive then you have lost the previous clone while creating the newer clone. In other words you have no backup.
You really should have a series of disk drives so you can put a few good ones on the shelf while making a new copy. You might want to think about where you store them.
Even when using TM you have to think about what will happen if the TM device fails.
Conclusion?
Some people do not make backups.
Some people store only files they think are critical on a server in a cloud (like leaving emails on the Google server for gmail).
Some make a back up to TM under the assumption they are really protecting against a failure with their computer but not a fire or other site wide problem.
Some will use TM for backups and still use CC or similar to make a clone every so often. The failure states can vary so incremental backups make sense for some problems and a bootable close covers some other risks.
If a person is really worried then a series of backups are needed with off-site storage for some or all of backups. That way the computer's data is protected from a local problems and from a site wide problem.
Each person can choose what they want to do, what they afford and how they will contain or reduce the risks. Maybe not all risks are worth dealing with. Just think it through before you commit to a solution.
John

Problem getting a wireless connection to HP iPAQ h5455

Problem getting a wireless connection to HP iPAQ h5455. This unit is small hand held device simlar to a PDA. I has both wireless and bluetooth access.
I get a connection to the modem but I can not connect to the internet.
I have verified the connection by ping and using the information provided on one of the h5455 status page.
I believe the problem I can not find anywhere to enter in my user id and password to get access to my dsl account.
Do I really need to enter in my user id and password to make a connection for the internet?
I have 3 other computer in my home network, 2 hardwired and 1 wireless. All of them can connect and go online with no problems.

#1 What is the brand and model of your router?
#2 What is the brand and model of your modem?
If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.

Ping problem in multimode

Hi,
I tried everything I used ASA with two routers for VLANs ,when I used without context in main mode it is working fine(as expected)....but
after config context and removing IP from main mode it is not working in context even without failover.... it is not pinging ....
I also gave "no mac-address auto " but my "sh arp" showing nothing too I have attached my topology with config.
Thanks,

Hi,
An ethernet interface will be always up/up and it goes down only if there is problem between the given port and the connected one. The issue can be anywhere else in the middle.

Ping problems between wired/wireless

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