CISCO Gigabit switch / Java UDP datagram

Hi,
1. I experience flooding of UDP packets and machine freeze when put rate is high. Using java MulticastSocket and Datagrams.
2. Tested with 2 machines to be in same multicast group, observerd that packets go to all other machines also which are not in multicast group.
Enabled IGMP snooping on CISCO switch but same problem. Looks like IGMP forwarding table is not correct.
Any help?
Thanks

1. I experience flooding of UDP packets and machine freeze when put rate is high. Using java MulticastSocket and Datagrams. Freeze at the sender or the receiver?
2. Tested with 2 machines to be in same multicast group, observerd that packets go to all other machines also which are not in multicast group.That's correct. Multicasts will go to all hosts behind a given router. What they won't do is go through the router, unless the router thinks there's a member on the other side.

Similar Messages

Load balancers vs. Gigabit switches + SSL decryptors

Please I would need your suggestions on how best to solve some pressing IDS re-implementation issues. Here is the problem:
We are planning on introducing the next generation IDS. This will replace the current
RealSecure 7.0 sensor deployments. At present, we are using Toplayer load balancers. But with aggregated traffic from the different sources hardly exceeding
470Mb, we think that we are not getting much value with the expensive load balancers. We are in effect, trying to explore the options of using gigabit switches to span
the traffic from different sources; and then feed the sensors with the spanned output.
The questions are?
1. What are the options are available to dispense with the load balancers?
2. If we have to use Cisco gigabit switches, which is the effective type, do we have to use IOS or how do we implement it, i.e. architecture; and do you think it is going to be a good replacement of the load balancers?
3. Is there a middle ground architecture?
4. Also, we are trying to introduce SSL decryptors for Web bound SSL traffic. There are different options out there including using sensors with embedded decryptors (such as McAfee's), using a plugin decryptor like breachview and doing termination. What do you think is the best option or are there some other alternatives?
Regards,
Charles Iheagwara

The document Gigabit Campus Design, Configuration, & Recovery Analysis has more information on Cisco gigabit switches that can replace the top layer load balancers.
http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns17/networking_solutions_white_paper09186a00800a3e0b.shtml

Trouble with Windows7 and Gigabit link on Cisco 3560X switch

Hello,
In my company, we are using Cisco IP Phones 7945G (with 2 gigabit network ports) and Cisco 3560X-48P (1GB ports) switches for our users.
Our client computers are running on Windows 7 SP1 (64bit - Enterprise edition) and are connected behind the IP Phone. We use a "Boradcom
Xtreme Gigabit" onboard network card on the computers. All ports (on the switch site and IP Phone side) and on the network card of the computer are configured in "auto negotiation". Duplex and speed are set to "auto".
We tried now to deploy a new engineering software and we are facing a very strange problem. This means that the engineer software fails to download some files from the server. We are using a flat network, all the servers and computers are on the same network segment with no firewall inbetween.
The firewall and Anti-virus on the computers are configured to allow all incoming/outing connections.
To troubleshoot, I tried to change all the network cables but I still get same result --> download fails.
I connected the client computer directly to the Cisco 3560X switch, without the IP Phone and I get the same result.
I installed a separate network card from INTEL (Intel PRO1000 PT) but I get the same result.
As last test, I have connected to same client computer directly to a Cisco 2960-8TC switch (100Mbit; auto negotiate) and here is working fine. The software successfully downloads all the files from the server.
If I connect the computer behind the Cisco 7945 IP Phone, set the speed and duplex of the PC-Port on the Cisco IP Phone 7945G to "100MBit/full duplex" is also working fine.
Is there any know issue with Windows7 and Gigabit network connections?
Do I need to set any Registry key on my Windows 7?
The firmware version of my Cisco 3560X-48P switch is 12.2(53)SE2; do I need to update it?
The firmware version of the IP Phone 7945G is 9.2.1.
Thanks in advanced for your help.
Marc Hoffmann

Hello, Thanks for your answers. First of all, I have updated the firmware of my Cisco Catalyst 3560X-48P switch to the version 12.2(55)SE5. Unfortunately, this did not solve my problem. As second step, I ran an TDR test on my 3560X switch but I do not get any result. The "Pair status" always says "not completed". Even if I wait for 5 minutes, the status remains at "Not completed". Am I doing something wrong ? To do the TDR test, I use the commande "test cable-diagnostics tdr interface gigabitEthernet 0/XY". For your information, the port gigabitEthernet 0/XY is in a "Connected" status when I run the "show int status" command. Jeff, I think there is no issue on the server side, because if I connect my workstation on a 100MB switch (example Cisco Catalyst 2960-8TC-L) the application works absolutely fine. Also, if I run the application locally on the server, it works fine. As next step, I will connect the workstation directly on our backbone switch and try the same test. Is there perhaps any Registry key in our Windows7 which could cause this trouble? If you have any other ideas or options, please let me know. Thanks a lot, Marc Hoffmann

Linksys Cisco SRW248G4P 48-port 10/100 + 4-port Gigabit Switch Help

The switch which is a Linksys Cisco SRW248G4P 48-port 10/100 + 4-port Gigabit Switch, was configured by a contractor which was long ago run off, and the documentation left behind to log into the switch is incorrect. How can we reset this switch so we can configure to the new required settings?
I have attempted to go in through the web browser gui, and no luck logging in via factory default creditials, cannot log in using any of the common admin creditials, nor can we get in via the documented admin name and pw the contractor left.
Attempted ot go in through the console, that doesn't work right at all. Takes 15-20 min before I start even seeing user name or password boxes. Cannot type a single thing into those boxes. I have set the hyperterminal to com1, 38400, 8, none, 1, hardware. It kinda lets me see some of the log in screen, but will not let me type into the username whatsoever.
Logging via web browser I see all the login option but not a single username or pw works. Please if anyone can help, this has been an issue which is now critical.

Hi, My name is Eric Moyers. I am a Network Support Engineer in the Cisco Small Business Support Center.
The settings for connection using Hyperterminal through the Console port should be:
Bits per second: 38400
Databits: 8
Pairity: None
Stop bits: 1
Flow Control: None
When you finish configuring the HyperTerminal, the Login screen appears. The first time you open the Console Interface, use the default username admin and leave the password blank and press the Enter key. You can set a password later from the User and Password Settings screen.The Main Menu screen displays six menu choices: System Configuration Menu, Port Status, Port Configuration, PoE Configuration, Help, and Log Out.
User and Password Settings, IP Configuration, File Management, Restore System Default Settings, Reboot System and Back to Main Menu.
To restore the Switch back to the factory default settings, select Restore System Default Setting and press Enter. A confirmation message appears asking Are you sure? [Y/N]. Press the Y key to continue or the N key to cancel the action.
System Configuration Menu options: (Which is where you will need to go) consist of: System Configuration, Management Settings
After pressing Y, at this point reboot your system and it will be back to Factory Fresh.
If you have any questions or this doesn't work, please let me know. I am attachng the Admin Guide for you as well.
Eric Moyers
Cisco Support Network Engineer
1-866-606-1866

Cisco SGE2010P 48-port Gigabit Switch - Setup & Configure via Web UI?

Hello,
I'm looking to purchase a Cisco SGE2010P 48-port Gigabit Switch (POE) for a 100% Macintosh environment. Because of this, none of the machines will be able to access the switch (including initial, out of the box setup) via the console port. So, I'm wondering if anyone can confirm if this switch is configurable, out of the box, via the Web UI (which would allow a Macintosh system to set it up no problem via a web browser)? I have asked all my suppliers and talked to a Cisco Product Specialist via web chat and also tried via phone, and no one can confirm if this is possible for sure.
The reason I ask is that I was also looking at a Nortel switch and even thought it had a Web UI for management, out of the box it had to be initially set up (ie. configuring the devices IP) via the console port first, and once that was done, only then could you access the Web UI.
I'm hoping this isn't the case with the Cisco switch and that it in fact is out of the box with a default IP so it can be accessed via the Web UI (without the need to go in via the console port).
Could anyone answer this question for me!?
If it helps, this is the website for the switch I'm considering...
http://www.cisco.com/en/US/products/ps9985/index.html
Regards,
Kristin.

SGE2000 and SGE2000P must have a DHCP server to get an IP-address. You “just” have to figure out the address they have been given.SGE2010 and SGE2010P has a default IP (192.168.1.254 – 255.255.255.0)All 4 devises has a web interface. I don’t see why it shut not work with a Mac browser. The primarily reason for buying SGE switches is their ability to stack. But 24 ports (SGE2000/P) and 48 ports (SGE2010/P) switches are not able to stack with each other. They have had several years to fix the problem so it is not likely it will ever bee fixit. If you stick to eater 24 ports ore 48 ports it will work.

Cisco Gigabit 3504 Performance

I have a Cisco Gigabit 3504 to which all the uplinks of my switches are connected.The bandwidth utilization when monitored is 0.7% and the users report slow performance despite connected directly to the switches.CDP,SNMP etc are disabled and the switch is running on minimal configuration.What are the steps to follow and how can i increase the performance so that the bandwidth of the gigabit is utilized and the increase Network Performance.

You should implement etherchanneling (bundling multiple links for bandwidth aggregation).
Disabling CDP and SNMP won't augment your performance.
Can we see the switch configs ?

New 150/65 only at 94 Download AND Won't Work with Gigabit Switch

I just had this installed today, converting up from the 35/35, and ran into these two problems:
1. The 150 download is only resulting in a 94.87 Mpbs. The installer originally said it must be my PC NIC card, but I do have a GB card, so there's does not appear to be legitimate reason for the shortfall there. I tried to change the link speed and duplex from "auto negotation" to "1 Gbps Full Duplex," but then my computer no longer even could connect.
2. The second issue is that I have always run my connection through a D-Link DGS-2208 Gigabit Switch because I have multiple wired ethernet computers in my office. The installer wanted to test the connection speed directly through my computer (see above) and ran into problems, so I never even tried to revert to my original setup with the switch until he left. However, when I did the Gigabit switch does not even recognize any activity when I plug the source ethernet cord into the switch. It does recognize the connection to the PC and the port is lit, but no lights from connection to the wall.
Any thoughts on what the problems could be? I've included the "additional details" from the Fios Speed test at the standard site (can't get any details from the high speed version):
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
SendBufferSize set to [261360]
running 10s outbound test (client to server) . . . . . 42.90Mb/s
running 10s inbound test (server to client) . . . . . . 69.90Mb/s
------ Client System Details ------
OS data: Name = Windows 7, Architecture = x86, Version = 6.1
Java data: Vendor = Oracle Corporation, Version = 1.7.0_05
------ Web100 Detailed Analysis ------
Client Receive Window detected at 65340 bytes.
622 Mbps OC-12 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.
Web100 reports the Round trip time = 6.78 msec; the Packet size = 1452 Bytes; and
No packet loss - but packets arrived out-of-order 0.02% of the time
This connection is receiver limited 37.88% of the time.
Increasing the the client's receive buffer (63.0 KB) will improve performance
This connection is sender limited 61.7% of the time.
Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
Server says [{edited for privacy}] but Client says [192.168.1.16]
Solved!
Go to Solution.

tdaignault wrote:
I tried to change the link speed and duplex from "auto negotation" to "1 Gbps Full Duplex," but then my computer no longer even could connect.
If your computer can't negotiate a 1Gbps connection, then that is what is limiting you to 94Mbps, which is about right for a "100Mbps" port.
There could be several reasons for this.
A bad NIC
A bad port on the switch
IMO, the most likely cause is a bad cable. 1Gbps requires all 4 pairs in the cable be connected. If only 2 of the 4 pairs are connected correctly, you will get a 100Mbps connect, but will not be able to connect at 1Gbps. Try replacing the cable with one known to work at 1Gbps.

Airport wifi problems with uverse and gigabit switch resolved

I think there is a bug in airport firmware 7.6 with how spanning tree works in addition to problems with the Uverse router. Having an Airport with a uverse 2wire 3801 and gigabit switch will not work. Putting the extreme in NAT mode with DMZ plus behind the uverse resolved the problem.
Network configuration:
Uverse 2wire 3801 router
    3801 provides prioritization for upstream traffic so skype and VoIP work better when doing a lot of stuff on Internet
Airport extreme firmware 7.6
two airport express 802.11n hardwired to extreme. Set up in bridge mode. All access points have same SSID "create a network" to enable roaming. Ignore anything to do with extending a network. firmware 7.6
two gigabit switches
    Netgear GS608 - 8 port gigabit switch
    Trendnet TEG-S80g - 8 port gigabit switch
    100BT 5 port switch - did not figure into problem
Three Uverse set top boxes wired on Ethernet. They have to be wire directly to the 2wire box to work correctly. See: http://forums.att.com/t5/Features-and-How-To/At-amp-t-U-Verse-modem-setup-Airpor t-Extreme/td-p/2300785
However, you need to be careful to place your own PCs and other internet devices on the network created by your gear (airport extreme in your case), but keep AT&T's set top boxes for the IPTV services IN FRONT of your own router - so they remain on AT&T's provided network.
So it would work like this ...
Network 1: 2wire RG (4 lan ports) -> Any Set tops, and to the WAN port on your AirportExtreme
Network 2: Airport Extreme LAN ports -> to any computers or internet devices (but not AT&T set top boxes).
The RG prioritizes the traffic for your Uverse Voice and your Uverse TV ahead of internet data traffic, as it rationalizes data heading out of your home. If you place your own equipment in that equation (like putting AT&T set top boxes behind your Airport Extreme) the performance and function of your AT&T set top boxes could really flake out on you.
Symptom:
    Everything would be working fine, then intermittently all my wifi access points would stop working. ~6,000 ms latency, dropped packets. Ethernet worked fine. Here is an example of my macbook pinging the extreme when associated with the extreme over wifi with a strong signal.
ping: sendto: Host is down
Request timeout for icmp_seq 23
Request timeout for icmp_seq 24
64 bytes from 192.168.1.64: icmp_seq=25 ttl=255 time=267.051 ms
Request timeout for icmp_seq 26
Request timeout for icmp_seq 27
Request timeout for icmp_seq 28
64 bytes from 192.168.1.64: icmp_seq=26 ttl=255 time=3402.599 ms
Request timeout for icmp_seq 30
Request timeout for icmp_seq 31
Request timeout for icmp_seq 32
64 bytes from 192.168.1.64: icmp_seq=30 ttl=255 time=3060.673 ms
64 bytes from 192.168.1.64: icmp_seq=34 ttl=255 time=24.115 ms
64 bytes from 192.168.1.64: icmp_seq=35 ttl=255 time=31.056 ms
64 bytes from 192.168.1.64: icmp_seq=36 ttl=255 time=39.828 ms
Root cause:
    It looks like the 2wire 2801 router has a problem with spanning tree when interoperating with gigabit switches and airports. There is interplay with the airport.
I did not have this problem until the 7.6 airport firmware. I had been using the Netgear hub for about a year with the extreme in bridge mode. I added the Trendnet hub and upgraded airport firmware at the same time which made fault isolation difficult.
Problem recreation:
Set up airport expresses hard wired to extreme
Connect gigabit switch anywhere to network
Everything OK
Dettach one computer from wifi then reattach, then all wifi stops working. It takes a few seconds for the problem to propagate.
Ethernet still works fine
Problem Resolution:
Connect to 2wire with ethernet
Set 2wire route to have subnet as 192.168.2.x
Set extreme in NAT mode behind 2wire. It will complain about double NAT. Override the warning. Set the subnet to 192.168.1.x so you don't have to change any static IP addresses. Note that 2wire uses 192.168.1.254 as default route whereas airport uses 192.168.1.1.
I set DHCP to start at .10 to leave the lower addresses for assigning static IP addresses to computers I want to expose outside the firewall.
Go into firewall settings. Select airport extreme. Select the bottom setting which is "DMZ Plus". When you go into the airport extreme settings, you will now see that it has the uverse public IP address on its WAN port. NAT port mappings work fine on the extreme behind the 2wire router.

Keeping this very short here is a summary of the actual problem and solution to allow your Apple Airport Extreme to run in Bridge mode on the same subnet as your uVerse settop boxes (if your Layer 2 switch is configurable).
Devices: Uverse, Cisco SG300, and Airport Extreme
uVerse uses Multicast to broadcast video streams between the uVerse network to the settop box, and from settop box to settop box.
X number of Multicast Groups are created based on X number of settop boxes you have. You can see the multicast definitions by logging into the webinterface of the iNid. Each settop box is a member and can choose to display a broadcasted TV stream or not.
Multicast membership is setup by the use of ICMP messages for IPv4 (MLD for IPv6). Each of the settop boxes become members of each others multicast group by reporting up to the iNid (MultiCast Proxy).
In an ideal world a layer 2 switch will track these memberships and only forward a broadcast packet to the ports on the switch to which the settop boxes are connected to. The switch would do these via snooping on the ICMP packets. Most switches by default do not do this by default and simply forward the broadcast packett out every one of it's switch ports.
Here in lies the problem. Problem is that the Apple AES doesn’t do ICMP snooping / filtering and floods the wireless network with these broadcast streams.
In order to fix this you must turn on ICMP snooping and filtering on the switch (or buy a switch that does this). I have a Cisco SG300 and list out the configuration below.
Other notes:
Ensure that all Media renderers (settop boxes) and servers are wired directly off the switch and not attached to any of the Airport Express ports. This way no media transverses the Airport (only control point traffic goes through the WiFi - which is fine). Obviously if the IGMP snooping switch sees any client requesting Multicast streaming traffic on the same port as the WAP, it will add that Multicast address to the forwarding table for that port, and then, yes it could get flooded.
Remember, you need to allow some Multicast traffic through your WAP to allow UPnP discovery to work (assuming that you will be using Wireless control points.)
Read the Multicast chapter in the SG 300 switch Admin Guide as it explains things very well.
Setting up multicast on the SG300s using the WebUI:
1. Multicast/Properties/
Tick enable Bridge Multicast Filtering Status for VLAN 1, and
set the Forwarding Method to IP Group Address for both IPv4 & IPv6.
2. Multicast/ IGMP snooping/
Tick enable IGMP snooping status then select and edit the entry and ensure that IGMP querier status is ticked.
It's essential for IGMP snooping to work that there must be at least one active IGMP querier on the network - if more than one is enabled, they will carry out an "election" to decide which one should be active (normally the one with the lowest IP address.)
3. Multicast Router Port
Set whichever port that is connected to the uVerse iNid to Status which means that it the uVerse router connected to this port is the Multicast Router
4. Multicast/ Unregistered Multicast
set all ports to Filtering. (The default is Forwarding.)
There are a lot of other variables within all the above - the defaults are OK, you should probably leave them alone!
In the config file you would then expect to see the above appearing as something like this:
ip igmp snooping
ip igmp snooping vlan 1
ip igmp snooping vlan 1 immediate-leave
interface vlan 1
bridge multicast mode ipv4-group
bridge multicast ipv6 mode ip-group
interface range gi1-10
bridge multicast unregistered filtering
ip igmp snooping vlan 1 querier
ip igmp snooping vlan 1 querier address <IP-Addr>

How can I mirror all ports on CISCO 3750 switches to one Gigabyte port?

Hi,
I have a requirement to mirror all the ports on my 7 CISCO 3750 switches, which are in 3 separate stacks, to one single Gigabyte Ethernet port.
Does anyone know how I can do that?
Thanks in advance.

Vlad, thanks a heap for your response.
I want to apply to my sitation. Please let me know if I get them right in the following:
Catalyst A
vlan 901
remote-span
monitor session 1 source interface fastethernet 1-48 (I want to monitor all ports on the CISCO 3725)
monitor session 1 destination remote vlan 901
Catalyst B
vlan 901
remote-span (If I don't need to monitor this switch, do I still need to put anything into this switch at all?)
Catalyst C
vlan 901
remote-span
monitor session 1 source interface fastethernet 1-48 (I want to monitor all ports on this switch as well)
monitor session 1 source remote vlan 901
monitor session 1 destination interface gigabitethernet 3 (There are 4 Gigabit Ethernet Uplink in CISCO 3750, I want all the traffic to go to port 3, is this the right way to do?)
Thanks in advance.

Cisco Blade Switch

I am having problems with configuring speed on uplink ports on cisco blade switches (Cisco Gigabit Ethernet Switch Module for HP BladeSystem p-Class). I can configure fixed speed on uplink ports (Gi0/19-22) but after reload I am getting message that this command was rejected:
speed 1000
^
% Invalid input detected at '^' marker.
and then auto-1000 speed is specified.I need fixed speeds on those ports.What is strange that access ports (Gi0/1-18) dont have this problems.I excluded firmare problem,vlan,vtp negotation. The problem is still recouring even if I configure this ports only with speed comand and nothing more. Could someone give me some clues? Thanks

Checked that olso,ports are 10/100/1000/auto Base-TX with half/full/auto duplex, so it seems that it is not an issue. I am getting this problem after this communicate:
cisco 371098-001 (PowerPC405) processor (revision B0) with 118784K/12280K bytes
of memory.
Processor board ID FOC0948T07C
Last reset from power-on
1 Virtual Ethernet interface
24 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:15:FA:D2:1A:00
Motherboard assembly number : 73-9666-09
Motherboard serial number : FOC09480QLE
Model revision number : B0
Motherboard revision number : A0
Model number : 371098-001
Daughterboard assembly number : 73-9697-04
Daughterboard serial number : FOC09480SJU
System serial number : FOC0948T07C
Top Assembly Part Number : 800-25741-01
Top Assembly Revision Number : C0
Version ID : V01
Daughterboard revision number : A0
Hardware Board Revision Number : 0x02
Switch Ports Model W Version SW Image
* 1 24 371098-001 12.2(25)SED CGESM-LANBASEK9-M
speed 1000
^
% Invalid input detected at '^' marker.
speed 1000
^
% Invalid input detected at '^' marker.
speed 1000
^
% Invalid input detected at '^' marker.
speed 1000
^
% Invalid input detected at '^' marker.
Press RETURN to get started!
Maybe there the answer lays. Do You know what is happeing then?

48Port Gigabit switch without FAN

Hello,
is there any 48Port Gigabit switch without fan in the actually Cisco SMB productlineup?
Best regatrds
Monika Javet

There won't be a small business switch which is gigabit without a fan.
All models;
SG300
SG500
SGE2010
SRW2048
All mentioned units are the small business 48 port units, they all include fans.
You may consider SG300-28 or SG500-28 for gig swithches without fans.
-Tom
Please rate helpful posts

Broadcast large UDP datagrams between VLANs

Hello,
I wish to broadcast large UDP packets between two VLANs (on the one set of stacked 3750 switches).
I have setup an ip helper which allows me to broadcast between vlans. That works fine, but I am limited to datagrams around 5912 bytes in size.
I want to be able to broadcast larger datagrams.
I can successfully broadcast larger datagrams (65000-ish bytes) within the one vlan, but not between two vlans.
Am I able to increase the size of broadcast UDP datagrams between vlans and if so, how?
Thanks in advance.

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
Hmm, I'm wondering whether a helper cannot forward fragments.
If not, if you enable jumbo support on the 3750, you might be able to send larger diagrams, but perhaps not larger than MTU.

Stacking with Cisco Blade Switches

Hi,
We have a HP p-class Blade System with two Cisco Gigabit Ethernet Switch Modules (Cisco IOS Release 12.2(25)SE) for every enclosure. My question is how I can stack the two blade switches (in the same enclosure) so that every HP blade server to be connected with the two switches in the active/standby state? In other words, can and how I make a port-channel which includes ports from the two switches?
Unfortunately I couldn't found any documentation for the purpose.

Hi,
With the CGESM switches you have you cannot use 802.3ad teaming against the two blade switches. This is possible with the Cisco 3120 blade switches for HP c-class.
Now, in your case, you can use standard Active/Standby NIC teaming, where the active NIC of each server connects to one switch and the standby NIC connects to the other switch. Should a blade switch completely fail, all of the servers with their active NIC connected to the failed switch should see the link go down and switch over to the standby NIC on the second switch. This should work very well.
One problem that can happen however is that the blade switch itself does not completely fail. Instead maybe the blade switch uplink fails, or the upstream switch it is connected to fails. In this situation the server NIC does not experience a failure and continues to send traffic to the blade switch that does not have anywhere to send the traffic, a black hole. This is perhaps the problem you are seeing?
The fortunate thing is that Cisco has a solution to this problem called Trunk Failover with Link State Tracking. What this allows you to do is to tell the blade switch that if it experiences a failure on its uplinks that it should also bring down the links to the servers as well. This will cause the servers to see a failure on their active NIC and perform a switchover to the second blade switch.
I looked up your switch and found that your 12.2(25)SE1 code does not support this feature. You will need to upgrade to 12.2(25)SEE4 and you will be able to configure this on your switches.
Here is a link to see how this configuration works:
http://www.cisco.com/en/US/docs/switches/blades/3020/software/release/12.2_25_sef1/configuration/guide/swethchl.html#wp1346176
Hope this helps.
If so please rate my posts.
Thanks,
Brad

Packet loss when pinging from/to a cisco 3560e switch

I see Packet loss when pinging from/to a cisco 3560e switch. CPU utilization is normal.
Switches are running with IOS c3560e-universalk9-mz.122-35.SE5.bin.
Packet loss is observed for all the devices irrespective of directly connected or remote devices.
If i do self pinging, there are no packet loss.
I don't see any error on interface.
Can anyone please help me in resolving this issue.

TCB       Local Address           Foreign Address        (state)
03737C48 10.47.0.229.60053       10.41.81.55.49         CLOSEWAIT
039ACDC4 10.47.0.229.61929       10.41.35.250.49        CLOSEWAIT
03B316C0 10.47.0.229.27544       10.41.81.55.49         CLOSEWAIT
038228F0 10.47.0.229.16506       10.41.35.250.49        CLOSEWAIT
039C3D04 10.47.0.229.15207       10.41.81.55.49         CLOSEWAIT
039A9BD0 10.47.0.229.52983       10.41.81.55.49         CLOSEWAIT
0394152C 10.47.0.229.22425       161.61.35.250.49       CLOSEWAIT
037D811C 10.47.0.229.21117       10.41.81.55.49         CLOSEWAIT
039C12BC 10.47.0.229.37437       10.41.81.55.49         CLOSEWAIT
03933B84 10.47.0.229.34085       161.61.35.250.49       TIMEWAIT
03B32340 10.47.0.229.45729       10.41.81.55.49         CLOSEWAIT
038247D0 10.47.0.229.32816       10.41.81.55.49         CLOSEWAIT
039A92D8 10.47.0.229.38680       161.61.35.250.49       CLOSEWAIT
037370F0 10.47.0.229.13212       10.41.81.55.49         CLOSEWAIT
037D85F0 10.47.0.229.38728       10.41.81.55.49         CLOSEWAIT
03B2B284 10.47.0.229.23428       10.41.81.55.49         CLOSEWAIT
03B2ADB0 10.47.0.229.56836       10.41.81.55.49         CLOSEWAIT
0394BFF0 10.47.0.229.23257       161.61.35.250.49       CLOSEWAIT
036604DC 10.47.0.229.44437       10.41.81.55.49         CLOSEWAIT
0394C700 10.47.0.229.22          192.37.184.211.61639   ESTAB
039B9A68 10.47.0.229.20543       10.41.81.55.49         CLOSEWAIT
03739B28 10.47.0.229.15392       10.41.81.55.49         CLOSEWAIT
TCB       Local Address           Foreign Address        (state)
0392EA48 10.47.0.229.13862       10.41.81.55.49         CLOSEWAIT
0365E23C 10.47.0.229.27856       10.41.81.55.49         CLOSEWAIT
03817C0C 10.47.0.229.64929       10.41.81.55.49         CLOSEWAIT
039357C8 10.47.0.229.22088       10.41.81.55.49         CLOSEWAIT
037375C4 10.47.0.229.21832       10.41.81.55.49         CLOSEWAIT
039C20E8 10.47.0.229.18169       10.41.81.55.49         CLOSEWAIT
03716D08 10.47.0.229.61993       10.41.81.55.49         CLOSEWAIT
039A74E4 10.47.0.229.62948       10.41.81.55.49         CLOSEWAIT
03655480 10.47.0.229.14052       10.41.81.55.49         CLOSEWAIT
039407F0 10.47.0.229.49643       161.61.35.250.49       CLOSEWAIT
039A53AC 10.47.0.229.13233       10.41.81.55.49         CLOSEWAIT
03739FFC 10.47.0.229.16605       10.41.81.55.49         CLOSEWAIT
039B82B8 10.47.0.229.16458       10.41.35.250.49        CLOSEWAIT
039BEBA4 10.47.0.229.64377       10.41.81.55.49         CLOSEWAIT
03741980 10.47.0.229.13866       10.41.81.55.49         CLOSEWAIT
03B3ABF8 10.47.0.229.19365       10.41.81.55.49         CLOSEWAIT
039B5810 10.47.0.229.24768       10.41.81.55.49         CLOSEWAIT
03956E48 10.47.0.229.55980       161.61.35.250.49       CLOSEWAIT
03946820 10.47.0.229.65053       161.61.35.250.49       CLOSEWAIT
037DBE94 10.47.0.229.15283       10.41.81.55.49         CLOSEWAIT
039A4854 10.47.0.229.48562       10.41.81.55.49         CLOSEWAIT
TCB       Local Address           Foreign Address        (state)
03B33320 10.47.0.229.29803       10.41.81.55.49         CLOSEWAIT
03B3B79C 10.47.0.229.12142       10.41.81.55.49         CLOSEWAIT
03713C9C 10.47.0.229.63799       10.41.81.55.49         CLOSEWAIT
039BBECC 10.47.0.229.14763       10.41.81.55.49         CLOSEWAIT
03656E40 10.47.0.229.16357       10.41.81.55.49         CLOSEWAIT
0362A73C 10.47.0.229.62450       10.41.81.55.49         CLOSEWAIT
039B878C 10.47.0.229.64402       161.61.35.250.49       CLOSEWAIT
03826CFC 10.47.0.229.16108       10.41.81.55.49         CLOSEWAIT
03B2CA34 10.47.0.229.17634       10.41.81.55.49         CLOSEWAIT
03AD78D0 10.47.0.229.15249       161.61.35.250.49       CLOSEWAIT
03AD967C 10.47.0.229.20389       161.61.35.250.49       CLOSEWAIT
03B2C560 10.47.0.229.37079       10.41.81.55.49         CLOSEWAIT
039C5128 10.47.0.229.24711       10.41.81.55.49         CLOSEWAIT
03822F74 10.47.0.229.54866       10.41.81.55.49         CLOSEWAIT
0372C5FC 10.47.0.229.13298       10.41.81.55.49         CLOSEWAIT
0372D278 10.47.0.229.12407       10.41.81.55.49         CLOSEWAIT
039A33D0 10.47.0.229.36573       10.41.81.55.49         CLOSEWAIT
039BCEF8 10.47.0.229.53853       10.41.81.55.49         CLOSEWAIT
039C02D8 10.47.0.229.53725       10.41.81.55.49         CLOSEWAIT
039B5CE4 10.47.0.229.58027       10.41.81.55.49         CLOSEWAIT
0381866C 10.47.0.229.17100       10.41.81.55.49         CLOSEWAIT
TCB       Local Address           Foreign Address        (state)
039BB374 10.47.0.229.53148       10.41.81.55.49         CLOSEWAIT
03AD3634 10.47.0.229.19716       161.61.35.250.49       CLOSEWAIT
0362DAA4 10.47.0.229.19479       10.41.81.55.49         CLOSEWAIT
0365AE60 10.47.0.229.62209       10.41.81.55.49         CLOSEWAIT
0362D5D0 10.47.0.229.41327       10.41.81.55.49         CLOSEWAIT
037D7C48 10.47.0.229.58283       10.41.81.55.49         CLOSEWAIT
03955474 10.47.0.229.33810       161.61.35.250.49       CLOSEWAIT
0373B15C 10.47.0.229.23331       10.41.81.55.49         CLOSEWAIT
036628D0 10.47.0.229.46856       10.41.81.55.49         CLOSEWAIT
03819584 10.47.0.229.19861       10.41.81.55.49         CLOSEWAIT
0394D000 10.47.0.229.64732       10.41.35.250.49        CLOSEWAIT
0394B760 10.47.0.229.19967       161.61.35.250.49       CLOSEWAIT
039B6BD4 10.47.0.229.40096       10.41.81.55.49         CLOSEWAIT
03AD7150 10.47.0.229.65184       10.41.35.250.49        CLOSEWAIT
039BC3A0 10.47.0.229.64702       10.41.81.55.49         CLOSEWAIT
03B3A724 10.47.0.229.60399       10.41.81.55.49         CLOSEWAIT
037145E0 10.47.0.229.43951       10.41.81.55.49         CLOSEWAIT
03955EDC 10.47.0.229.29015       161.61.35.250.49       TIMEWAIT
0365FB34 10.47.0.229.13961       10.41.81.55.49         CLOSEWAIT
03828D54 10.47.0.229.12743       10.41.81.55.49         CLOSEWAIT
037DB40C 10.47.0.229.23708       10.41.81.55.49         CLOSEWAIT
TCB       Local Address           Foreign Address        (state)
039AF814 10.47.0.229.15100       10.41.81.55.49         CLOSEWAIT
0392E344 10.47.0.229.23399       10.41.35.250.49        CLOSEWAIT
0393DC3C 10.47.0.229.15393       161.61.35.250.49       CLOSEWAIT
03AD85D0 10.47.0.229.40932       161.61.35.250.49       TIMEWAIT
039574CC 10.47.0.229.25935       10.41.35.250.49        CLOSEWAIT
03738B74 10.47.0.229.58656       10.41.81.55.49         CLOSEWAIT
039AD91C 10.47.0.229.56760       10.41.81.55.49         CLOSEWAIT
03B3BC70 10.47.0.229.15058       10.41.81.55.49         CLOSEWAIT
03B2DC54 10.47.0.229.51131       161.61.35.250.49       CLOSEWAIT
03B393F0 10.47.0.229.11957       10.41.35.250.49        CLOSEWAIT
039B2610 10.47.0.229.33728       10.41.81.55.49         CLOSEWAIT
03B311EC 10.47.0.229.18047       10.41.81.55.49         CLOSEWAIT
039A8E04 10.47.0.229.52022       161.61.35.250.49       CLOSEWAIT
0365D460 10.47.0.229.12241       10.41.81.55.49         CLOSEWAIT
03B33E78 10.47.0.229.47640       10.41.81.55.49         CLOSEWAIT
0372C128 10.47.0.229.60323       10.41.81.55.49         CLOSEWAIT
03661CD8 10.47.0.229.39923       10.41.81.55.49         CLOSEWAIT
0393C73C 10.47.0.229.41864       10.41.35.250.49        CLOSEWAIT
03829584 10.47.0.229.56673       161.61.35.55.49        CLOSEWAIT
0362AC10 10.47.0.229.31952       10.41.81.55.49         CLOSEWAIT
039BF078 10.47.0.229.22636       10.41.81.55.49         CLOSEWAIT
TCB       Local Address           Foreign Address        (state)
0365CF8C 10.47.0.229.14476       10.41.81.55.49         CLOSEWAIT
039B443C 10.47.0.229.59226       10.41.81.55.49         CLOSEWAIT
0393E794 10.47.0.229.56282       10.41.35.250.49        CLOSEWAIT
03657740 10.47.0.229.25769       10.41.81.55.49         CLOSEWAIT
03B2F6E8 10.47.0.229.19328       10.41.81.55.49         CLOSEWAIT
0373AC88 10.47.0.229.25766       10.41.81.55.49         CLOSEWAIT
039B213C 10.47.0.229.28882       10.41.81.55.49         CLOSEWAIT
039C07AC 10.47.0.229.38201       10.41.81.55.49         CLOSEWAIT
03AD8DD0 10.47.0.229.23002       10.41.35.250.49        CLOSEWAIT
03739048 10.47.0.229.29572       10.41.35.250.49        CLOSEWAIT
039BA464 10.47.0.229.32273       10.41.81.55.49         CLOSEWAIT
03B31E6C 10.47.0.229.32521       10.41.81.55.49         CLOSEWAIT
0365EBE0 10.47.0.229.41319       10.41.81.55.49         CLOSEWAIT
03938804 10.47.0.229.62841       10.41.35.250.49        CLOSEWAIT
039A1AF8 10.47.0.229.12758       10.41.81.55.49         CLOSEWAIT
039B7DE4 10.47.0.229.20921       10.41.81.55.49         CLOSEWAIT
036549F8 10.47.0.229.51903       10.41.81.55.49         CLOSEWAIT
03714CC8 10.47.0.229.45145       10.41.81.55.49         CLOSEWAIT
037425F8 10.47.0.229.56492       10.41.81.55.49         CLOSEWAIT
03B39D74 10.47.0.229.18174       10.41.81.55.49         CLOSEWAIT

A 10/100 Router and a gigabit switch...will they get along?

I am setting up my business network between multiple computers. I need gigabit speeds for large file transfers (video, audio, images), but I also need internet connectivity. I was planning on using a simple 10/100 4 port broadband router and a Netgear Prosafe 24 port 10/100/1000 gigabit switch. If I connect the router to the switch, will my network's performance decrease since the router is responsible for assigning ip addresses, or will the switch's gigabit speeds still work within my network (since switches operate using MAC addresses)? Can anyone help me on this one? Thank you!
P.S. --It's also between Mac and Window systems
Powerbook G4 17" Mac OS X (10.4.7)

If the devices plugged into the gig-switch have gigabit ethernet ports, then you will see a speed advantage over 100mbps performance. I have a similar setup, with a 4-port linksys router that is 10/100 and an 8-port linksys gig-switch connected to it. I connect my printer and VOIP adapter directly to the router, since they aren't gig anyway, and connect my other devices to the gigabit switch.

CISCO Gigabit switch / Java UDP datagram

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