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Converssion to VSS

mostafa ouamou
Beginner
Beginner

Hello,

I have two C6509-E with Sup2T. I converted each one to VSS mode separately.
I want to know the impact or what will be happen if i connected them through the VSL.

The configuration file " Interface numbering" in the both device is not synchronisate yet.

Switch-1>show switch virtual role

RRP information for Instance 1

--------------------------------------------------------------------

Valid  Flags   Peer      Preferred  Reserved

               Count     Peer       Peer

--------------------------------------------------------------------

TRUE    V        0           0          0

Switch  Switch   Status      Priority     Role     Local   Remote

        Number               Oper(Conf)            SID     SID

--------------------------------------------------------------------

LOCAL   1         UP         110(110)     ACTIVE    0       0  

====================

Switch-2>show switch virtual role

RRP information for Instance 1

--------------------------------------------------------------------

Valid  Flags   Peer      Preferred  Reserved

               Count     Peer       Peer

--------------------------------------------------------------------

TRUE    V        0           0          0

Switch  Switch   Status      Priority     Role     Local   Remote

        Number               Oper(Conf)            SID     SID

--------------------------------------------------------------------

LOCAL   2         UP         100(110)     ACTIVE    0       0  

5 Replies 5

Georg Pauwen
VIP Master VIP Master
VIP Master

Hello,

once connected through VSL, one of the switch virtual roles will be active, the other standby. Check this post, it has a pretty comprehensive overview of what you will get:

https://supportforums.cisco.com/document/124626/virtual-switching-system-vss-configuration-cisco-4500-series-switches

Hello,

thanks for your response,

Both switch are configured as vss but they never synchronize the configuration so one of them is in production I want to know if I activate the VSL which one will be reload and which config will be override,

Thanks.

When you configure the VSS domain, you can specify which switch becomes the active and which the standby. The one with the lower priority becomes active:

6509SW1(config-vs-domain)# switch 1 priority 110
6509SW1(config-vs-domain)# switch 2 priority 100

6509SW2(config-vs-domain)# switch 1 priority 110
6509SW2(config-vs-domain)# switch 2 priority 100

The configurations don't really matter, as they will be synchronized and reduced to a basic set of commands:

--> When you configure VSL, all existing configurations are removed from the interface except for specific allowed commands. When you configure VSL, the system puts the interface into a restricted mode. This means that only specific configuration commands can be configured on the interface.

The following VSL configuration commands are inserted automatically on all VSL member ports:

•switchport mode trunk

•switchport nonegotiate

•no lldp transmit

•no lldp receive

•no cdp enable

•service-policy output VSL-Queuing-Policy

In VSL restricted mode, only these configuration commands are available:

•channel-group

•default

•description

•exit

•load-interval

•logging

•no

•power

•shutdown --<

mostafa ouamou