"switchport trunk allowed vlan add 400" and I ran it under interface Port-Channel1.
Tony Varriale wrote: > What was the command and where did you add it? > > tv > ----- Original Message ----- From: "Jared Gillis" > <[email protected]> > To: <[email protected]> > Sent: Thursday, January 07, 2010 2:23 PM > Subject: [c-nsp] Adding vlan to port-channel trunk causes port-channel > toflap > > >> Hi all, >> >> I just ran into a strange problem on a 3750ME. I've got two gig ports >> in an active LACP port-channel looking like this: >> >> interface GigabitEthernet1/0/1 >> switchport trunk encapsulation dot1q >> switchport trunk allowed vlan 101,102,400,664,1000-2999 >> switchport mode trunk >> speed 1000 >> duplex full >> channel-group 1 mode active >> end >> >> interface GigabitEthernet1/0/2 >> switchport trunk encapsulation dot1q >> switchport trunk allowed vlan 101,102,400,664,1000-2999 >> switchport mode trunk >> speed 1000 >> duplex full >> channel-group 1 mode active >> end >> >> interface Port-channel1 >> switchport trunk encapsulation dot1q >> switchport trunk allowed vlan 101,102,400,664,1000-2999 >> switchport mode trunk >> end >> >> When I added vlan 400 to the trunk allowed vlan list, one of the >> underlying gig ports flapped, which caused the port-channel to flap as >> well. >> Jan 7 12:09:27.647 PST: %LINEPROTO-5-UPDOWN: Line protocol on >> Interface GigabitEthernet1/0/1, changed state to down >> Jan 7 12:09:27.656 PST: %LINEPROTO-5-UPDOWN: Line protocol on >> Interface Port-channel1, changed state to down >> Jan 7 12:09:28.654 PST: %LINK-3-UPDOWN: Interface Port-channel1, >> changed state to down >> Jan 7 12:09:31.464 PST: %LINEPROTO-5-UPDOWN: Line protocol on >> Interface GigabitEthernet1/0/1, changed state to up >> Jan 7 12:09:32.454 PST: %LINK-3-UPDOWN: Interface Port-channel1, >> changed state to up >> Jan 7 12:09:33.461 PST: %LINEPROTO-5-UPDOWN: Line protocol on >> Interface Port-channel1, changed state to up >> Jan 7 12:09:48.745 PST: %LINEPROTO-5-UPDOWN: Line protocol on >> Interface Vlan400, changed state to up >> >> This definitely seems like something that should not happen. I'm >> running Cisco IOS Software, C3750ME Software (C3750ME-I5K91-M), >> Version 12.2(46)SE, RELEASE SOFTWARE (fc2). >> Any thoughts on what I should be checking? >> >> --Jared >> _______________________________________________ >> cisco-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/cisco-nsp >> archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
