4500X VSS Trunking issue

[wooiboon.tan]

Hi,

I am having an issue that the VSS is different for each switch and the trunking is not working, is there anyway to configure the trunking on the VSL port without breaking the VSS? I have set the trunking on both switches but somehow after the VSS connection is up the trunking is removed on the switch 2. The following are the snippet of the VSS configuration:

Switch 1:

interface Port-channel1
 description *** VSS Port-Channel 1 ***
 switchport
 switchport mode trunk
 switchport nonegotiate
 switch virtual link 1

interface TenGigabitEthernet1/2/8
 description *** VSS Links ***
 switchport mode trunk
 switchport nonegotiate
 no lldp transmit
 no lldp receive
 no cdp enable
 channel-group 1 mode on
 service-policy output VSL-Queuing-Policy

!

Switch 2:
interface Port-channel2
 switchport
 switch virtual link 2
!

interface TenGigabitEthernet2/2/8
 no lldp transmit
 no lldp receive
 no cdp enable
 channel-group 2 mode on
 service-policy output VSL-Queuing-Policy
!

Now I only have limited command on the Port-Channel 2:

SWITCH01(config)#int po2
SWITCH01(config-if)#?
virtual link interface commands (restricted):
  default         Set a command to its defaults
  description     Interface specific description
  exit            Exit from virtual link interface configuration mode
  load-interval   Specify interval for load calculation for an interface
  logging         Configure logging for interface
  no              Negate a command or set its defaults
  service-policy  Configure CPL Service Policy
  shutdown        Shutdown the selected interface
  switch          Configure switch link

Thanks in advance for any helpful comment.

[Reza Sharifi · Accepted solution]

Hi,

You don't need to configure the VSL link as trunk:

just follow this config example:

Switch-1(config)# interface port-channel 10 

Switch-1(config-if)# switch virtual link 1

Switch-1(config-if)# no shutdown (If the port is admin shutdown)

Switch-1(config)# interface tenGigabitEthernet 5/1

Switch-1(config-if)# channel-group 10 mode on

Switch-1(config-if)# no shutdown (If the port is admin shutdown)

Switch-2(config)# interface port-channel 25 

Switch-2(config-if)# switch virtual link 2

Switch-2(config-if)# no shutdown (If the port is admin shutdown)

Switch-2(config-if)# interface tenGigabitEthernet 5/2

Switch-2(config-if)# channel-group 25 mode on

Switch-2(config-if)# no shutdown (If the port is admin shutdown)

link:

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/15-1-2/XE_340/configuration/guide/config/vss.html#wp1060298

HTH