[c-nsp] Problems adding VLAN's to portchannel trunk

[Mike Louis]

When the channel goes down is it err-disabled because of port-channel misconfig?

You could set the sides to

channel-group 1 mode on

on each side and then add the vlan. that should work.
________________________________________
From: cisco-nsp-bounces at puck.nether.net [cisco-nsp-bounces at puck.nether.net] On Behalf Of Nate Carlson [cisco-nsp at natecarlson.com]
Sent: Wednesday, October 24, 2007 3:53 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Problems adding VLAN's to portchannel trunk

We've got a 6509 [12.2(17a)SX1] connected to a couple switches in a HP
c-Class blade chassis, which are Cisco 3020's [CBS30X0-LANBASE-M,
12.2(25)SEF1]. We've got an issue where we can't add a VLAN to the trunk
without it going down because of VLAN mismatch while we are trying to add
it to all three interfaces on each side (the two gig's, and the
portchannel interface.] Here's what our config looks like; if anyone has
advice on how we could add VLAN's to the allowed list without the links
dropping, I'd love to hear it!

3020:
!
interface Port-channel1
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,20,25
  switchport mode trunk
  spanning-tree link-type shared
!
interface GigabitEthernet0/17
  description description Trunk to cat1 (6509) port 6/19
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,20,25
  switchport mode trunk
  channel-group 1 mode desirable
  spanning-tree link-type shared
!
interface GigabitEthernet0/18
  description description Trunk to cat1 (6509) port 7/19
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,20,25
  switchport mode trunk
  channel-group 1 mode desirable
  spanning-tree link-type shared
!


6509:
!
interface Port-channel1
  description hp c-class switch port 6/19, 7/19
  no ip address
  flowcontrol receive on
  switchport
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,20,25
  switchport mode trunk
  switchport nonegotiate
  spanning-tree link-type shared
!
interface GigabitEthernet6/19
  description trunk to hp c-class port 0/17
  no ip address
  logging event link-status
  flowcontrol receive on
  switchport
  switchport trunk allowed vlan 1,20,25
  switchport mode trunk
  switchport nonegotiate
  spanning-tree link-type shared
  channel-group 1 mode desirable
!
interface GigabitEthernet7/19
  description trunk to hp c-class port 0/18
  no ip address
  logging event link-status
  flowcontrol receive on
  switchport
  switchport trunk allowed vlan 1,20,25
  switchport mode trunk
  switchport nonegotiate
  spanning-tree link-type shared
  channel-group 1 mode desirable
!


------------------------------------------------------------------------
| nate carlson | natecars at natecarlson.com | http://www.natecarlson.com |
|       depriving some poor village of its idiot since 1981            |
------------------------------------------------------------------------
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