[c-nsp] strange vlan issue

[Bøvre Jon Harald]

I had similar problem a year ago.

two 7609/SUP720 trunked together with 20-30 VLAN's
one vlan (vlan 800 or close to 800)  running one of the important BGP sessions refused any traffic
Removed all vlan 800 config, reapplied back without success. Reload was not an option.
changed to vlan 900, everything OK.

To your problem with 2950:
Did anything change around this switch?
Connected switches?
DTP, VTP, port security, duplex?

Jon
 

________________________________________
Fra: cisco-nsp-bounces at puck.nether.net [cisco-nsp-bounces at puck.nether.net] på vegne av Lee Starnes [lee.t.starnes at gmail.com]
Sendt: 15. september 2010 18:44
Til: cisco-nsp at puck.nether.net
Emne: [c-nsp] strange vlan issue

Hi All,

I'm really puzzled by a switch that has stopped working on one vlan only.
This switch has vlans 1 and 2. vlan 1 no longer will pass traffic. I can't
even ping out to it's gateway from the switch, but you can ping the switch
from it's gateway. A show cdp nei shows what it is connected to.

I have replaced the cable and switched to different ports with no luck. I
have never seen an issue where a switch will just stop passing traffic on 1
vlan. We replaced the switch and all is fine, so just want to know if
someone else has seen this issue before.

The switch is a 2950. It has been in service and running flawlessly with the
same config since November of 2002.

Thanks,

Lee
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