12-25-2019 06:43 AM
Hi everyone,
I need explain about config SLV on C9600:
1. When SVL group links down, By DAD link, act switch convert to Act Switch-Recoverry mode, Stanby Sw- active. But SVL up why act sw-recoverry mode cannot switch back to the original.
2. As Cisco document, default SVL is etherchannel, why I unplug 01 SVL link Stanby switch reload ? I config 02 link on 01 switch to group link SVL.
Thanks and Regrards,
TD
Solved! Go to Solution.
12-25-2019 02:43 PM
Hi,
1. When SVL group links down, By DAD link, act switch convert to Act Switch-Recoverry mode, Stanby Sw- active. But SVL up why act sw-recoverry mode cannot switch back to the original.
That is by design, so there is never loop on the network.
2. As Cisco document, default SVL is etherchannel, why I unplug 01 SVL link Stanby switch reload ? I config 02 link on 01 switch to group link SVL.
Unplugging one of the SVL links should not reload the active or the standby switch.
This maybe a bug or a config issue.
HTH
12-25-2019 01:42 PM
Any body help me ?
12-25-2019 02:22 PM
Hello,
to partially answer your question: I think there is no mechanism to 'preempt' (similar to HSRP) the active SVL switch. The logical reason I can think of for that is that, since both SVL switches are of the same model, software version and license level, a preemptive switchback would only increase the downtime and not have any advantage.
12-25-2019 02:43 PM
Hi,
1. When SVL group links down, By DAD link, act switch convert to Act Switch-Recoverry mode, Stanby Sw- active. But SVL up why act sw-recoverry mode cannot switch back to the original.
That is by design, so there is never loop on the network.
2. As Cisco document, default SVL is etherchannel, why I unplug 01 SVL link Stanby switch reload ? I config 02 link on 01 switch to group link SVL.
Unplugging one of the SVL links should not reload the active or the standby switch.
This maybe a bug or a config issue.
HTH
12-25-2019 06:51 PM - edited 12-25-2019 07:37 PM
Here is config. Pls review help me
stackwise-virtual
domain 2
interface twentyFiveGigE 1/1/0/45
stackwise-virtual link 1
interface twentyFiveGigE 1/2/0/45
stackwise-virtual link 1
interface twentyFiveGigE 2/1/0/45
stackwise-virtual link 1
My version:
Cisco IOS XE Software, Version 16.11.01
Cisco IOS Software [Gibraltar], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 16.11.1, RELEASE SOFTWARE (fc3)
interface twentyFiveGigE 2/2/0/45
stackwise-virtual link 1
12-27-2019 05:50 AM
Thanks for supporting, I upgraded to new version 16.12.02 (before 16.11.01). All problem is resloved.
12-27-2019 09:16 AM
Hi,
Thanks for the update. I guess it was bug in the version you were running.
HTH
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