06-11-2020 06:57 PM - edited 06-11-2020 06:58 PM
Dears
I currently have 2 x C9500-24Y4C connected via 1 x 10GB Stackwise-virtual link (SVL) and it's up and running.
I would like to add a second SVL 10GB link for redundancy and greater throughput.
If I go with adding the port and configure it, should I need to restart the switch to make the new link run? and am I gonna face any downtime or network interruption? or it will go smoothly with no interruption on the network?
Regards
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06-11-2020 07:56 PM
06-11-2020 07:52 PM
Hi,
You should be able to add a second port to the Porchannel and there is no need to reboot. That said, I would have a maintenance window and do it during off hours just in case something unexpectedly goes wrong.
HTH
06-11-2020 07:56 PM
06-12-2020 11:05 AM
06-12-2020 11:13 AM
Thanks for the feedback!
Let us know if it works without reloading both switches. It is absurd and such a bad design if you have to reload both switches simply because you are adding an extra link to the SVL.
HTH
06-14-2020 06:28 PM
10-01-2020 02:14 AM
Situation :
2 x Cisco 9500-16X
Active SVL on Te1/0/15 <> Te2/0/15
Tried to add second SVL on Te1/0/14 <> Te2/0/14 via redundant fiber-route :
CSW(config)#int te2/0/14
CSW(config-if)# stackwise-virtual link 1
WARNING: All the extraneous configurations will be removed for TenGigabitEthernet2/0/14 on reboot
INFO: Upon reboot, the config will be part of running config but not part of start up config.
CSW(config-if)#int te1/0/14
CSW(config-if)# stackwise-virtual link 1
WARNING: All the extraneous configurations will be removed for TenGigabitEthernet1/0/14 on reboot
I tried rebooten switch 2 first but the Te1/0/14 stayed in SHUTDOWN
Te1/0/14 admin down down StackWise-Virtual Link #1 (MER1 > SER2 fiber 3/4 > MER2)
Te1/0/15 down down StackWise-Virtual Link #1 via MER1 Fiber
CSW(config)#int te1/0/14
CSW(config-if)#no shut
^
% Invalid input detected at '^' marker.
I also tried to reboot switch 1, no luck again.
Therefor I had to reboot both members at once :
10-23-2020 07:49 AM
You have to reboot the switch via redundancy force-switchover. Only this command works to add a additional SVL Link and you have to do it twice.
There is a outage of 1sec/1Ping. If you reboot the whole Stack, then you have an outage of 10min.
07-23-2021 05:13 AM
did anybody try the redundancy force-switchover?
12-20-2022 02:51 PM
I´m going to test it tomorrow.
We previously wanted to use 40Gig, but we had the 40/100 bidi which only goes 100 meters... so we had to step back to 10 gig.
Therefor I changed both links on the first box to 10 gig.
Afterwards i did the same on the second box, but only one of both links was correctly added to the running-config.
So i added the second link on the second box again... and now we have the same situation.
I´ll keep u updated
12-06-2023 02:21 AM
I know this is an old port, but has anyone tried this "redundancy force-switchover" to add a second stackwise virtual link? did it work?
08-08-2024 01:47 PM
It kind of looks like the 9500X ones might allow it, but not what you have.
Dynamic addition and removal of SVL links are supported on the Cisco Catalyst 9500X Series Switches, and therefore, a reload is not required for adding or removing the SVL links when the device is already operating in SVL mode.
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