10-30-2016 05:08 AM - edited 03-08-2019 07:58 AM
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
10-30-2016 08:21 AM
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
10-30-2016 01:24 PM
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.
10-30-2016 01:52 PM
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 --<
10-30-2016 03:19 PM
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.
10-30-2016 07:29 PM
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
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