Converssion to VSS

[mostafa ouamou]

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  

[Georg Pauwen]

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

[mostafa ouamou]

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.

[Georg Pauwen]

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]

Hello,

The both switchs had already converted to vss but are not synchronized each one had its new interface numbering switch 1 (gig 1/1/1) swich 2 (2/1/1) therefore the switch 1 is in production am afraid that when I connect the switch 2 its config override that of in switch 1.

[Reza Sharifi]

Hi,

You really need to add switch-2 during an outage window, as after connecting it you may have to reboot both chassis to sync the config and have switch-1 as active and switch-2 as stand-by. Also, before adding swtch-2 make a good back up of the config in case something goes wrong.

HTH