3750 problems

[glen.grant]

Anyone seeing problems with these units ? We are testing them out and we put them on the network setup as a layer 2 switch with no ip routing running and within 5 minutes the the thing goes to sleep and you cannot ping or telnet to it . If I then go in via the console and ping an outside address from the 3750 it will ping that address and then you can also ping the 3750 or telnet to it . It almost seems like a mac aging time issue and it doesn't handle an arp correctly .Have looked at CCO for bugs but didn't see anything that seemed to relate to this . It is running version 12.2.25 SEB1 . Thought maybe it was a stack issue but disconnected the stack and only ran 1 switch but the problem is still there . Nothing in the logs to indicate a problem either . Everything in vlan 1 . Any thoughts or has anyone seen anything like this with these boxes ???

[Prashanth Krishnappa]

I have not heard anything like this. If this is not in production, can you do some tests such as debug ip packet or capture sniffer traces when the problem is happening. Also, post an output of sh ver and sh run.

[glen.grant]

The 3750 is hooked to a older 2924 running 11.2.8.12.SA6. All are hooked on the same network in vlan 1 . When the 3750 goes to sleep I cannot even ping it from the directly attached switch . The 3750 does not reply to ping or telnet from a directly attached switch . Debugging ip packet does not even recognize the incoming request though .It does see all the other broadcasts etcc on the network. If you ping out from the 3750 it sees the outgoing request and the reply ok but once it goes to sleep it does not recognize an incoming ping request. Has to be a bug I would think ,can't think of what else it would be . the only other thing I notice is that I am getting a native vlan mismatch error on the old 2924 even though both are in vlan 1 and there is no corresponding message on the 3750 indicating that so I don't know what that is about . have also tried different cables to elimnate that also .

[Prashanth Krishnappa]

You are seeing native VLAN mismatches mostly because your old IOS in XL does not support CDP version 2.

I quicky tried a similar set up in my lab and did not notice any issues. I do not think this to be a bug at this time. I suggest that you open a TAC case to get to the root of it.

[glen.grant]

Ok I narrowed this down to a 2924 problem , I bypassed the 2924 and ran the network connection to a 4006 and the problem went away . Was also seeing some of the same flakey behavior on the 4006 when it went thru the 2924 so I decided to bypass that and the problem went away . Weird to say the least .