02-25-2008 07:33 AM - edited 03-05-2019 09:21 PM
Hi,
a few days ago I updated my 2950 from IOS 120-5.3.WC.1 to 12.1-22-EA11.
Since then my infrastucture started to behave in bizarre way. The leds suddenly stop blinking and after a few seconds recover their normal status.
The switches are connected through a trunk to a cat 3550 (mz.121-6.EA1).
The 2950 trunk configuration is:
interface GigabitEthernet0/1
switchport mode trunk
The 3550 trun configuration is:
interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
snmp trap link-status
The topology is fully resilience to faults (clustered). Two 3550 with an etherchannel between them, several 2950 & 2960 connected to the 3550 and between them trough trunk links
The 2960 with IOS 12.2(25)SEE are running without problems.
Due to the extrange behavior I had to rearrange the boxes connected to 2950 to the 2960.
My topology is running pvst.
Any ideas?
I will appreciate any help
Best regards.
02-25-2008 10:40 AM
Hi,
Can you explain a bit how your 2950 is connected exactly to your 3550? You say Port-channel1 (3550) <-> trunk (2950)? Shouldn't it be trunk<->trunk?
Regards,
Pascal
02-25-2008 01:49 PM
Hi Pascal,
let me outline my topology
3550 <--Etherchannel--> 3550
| | | |
| |trunk trunk| |
| | | |
| 2950-----trunk-----2950 |
| |
|trunk trunk|
| |
2960-------trunk-------- 2960
All the switches are clustered. Now currently the 2950 are turned off to avoid extrange behavior, as I commented before.
I forgot before, when the leds stop blinking the port on the 3550 turns off, turns orange and finally blinks green.
May be something related to ST, but when only the 2960 and the 3550 are running they operate normally.
Thanks in advance and best regards.
02-26-2008 01:30 PM
Hi Pascal again and sorry for yesterday's drawing.
Attached, you can find a file with to drawings. The first one represents my topology when the problem arised. Today I removed all the 2950 from the cluster and the new topology is the one represented by the second drawing. In this way we still have the problem without affecting the network. We have connected 6 test PCs to the 2950.
Best Regards.
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