11-10-2014 05:24 AM - edited 03-07-2019 09:27 PM
Hi,
We are having Cisco 4500 switches running in VSS mode. Currently VSS links are connected on ports with capacity of 1 GB & we wanted to replace those ports with new 10 GB DAC cable.
We manage this switch remotely via SSH. If we disable VSS link or broke the VSS between 2 switches , is it still possible to access switches over SSH ?
or we need someone near to device for Console session ?
Thanks in advance.
11-10-2014 08:58 AM
It depends on how the setup is.
If you have the devices access through the console server then you should be able to access the box.
Reason: When you bring down the VSL link the dua active condition triggered.
Switch 1 detects that switch 2 is now also active triggering dual active
condition thus switch 1 brings down all the local interfaces to avoid network
instability. Until VSL link restoration occurs, switch 1 is isolated from the
network;
Once the VSL link comes up, the role negotiation determines that switch 1
needs to come up in STAND_BY mode hence it reboots itself; finally, all
interface on switch 1 are brought on line and switch 1 assumes STAND_BY role.
HTH
11-10-2014 10:08 AM
Hi,
Once you pull out the second VSL link, the switch will go into the dual active detection and the primary switch (switch-1) will reboot. Now you can access switch-2 remotely, but since you are changing the VSL links from 1Gig to 10Gig then switch-1 should be able to recognize it because it is in the process of rebooting, but not sure is switch-2 will.
I think, for this you need someone with console cable near the switches just in case.
HTH
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