Management ip vss

[cisco8887]

Hi all

we have a vss 6800 with vlan 100

but vlan 100 is not part of a trunk or assigned to any port so we can't access the switch on that ip

how would you brind the vlan up for management access?

you can't add it on vss link as well, can you?

[Francesco Molino · Accepted solution]

Hi

when you're building a VSS, all vlans are allowed to passthrough the VSL link and it's a specific link you need to consider as a "Fabric link" (to illustrate its definition).

Now, if you want to access your VSS cluster through IP from vlan 100 and this vlan isn't assigned to a port or even trunk to at least 1 port, this vlan will be always in down mode. For that purpose, I would recommend moving IP for Vlan100 into a Loopback that'll be always UP and you'll be able to access your VSS cluster through that dedicated IP.

Thanks

Hope this clear enough.

PS: Please don't forget to rate and mark as correct answer if this answered your question.

[cisco8887]

Many thanks for this

I am correct assuming VSS link allows all vlans through it with no control over it to modify what is allowed to pass through ?

I didn't undertsand what you meant when you said "s a specific link you need to consider as a "Fabric link" (to illustrate its definition)."

Can you please elaborate?

[Francesco Molino]

Hi

I'll paste Cisco explanation about the VSL Link:

The link belonging to EtherChannel is called Virtual Switch Link (VSL). The VSL serves as logical connection that carries critical system control information such as hot-standby supervisor programming, line card status, Distributed Forwarding Card (DFC) card programming, system management, diagnostics, and more. In addition, VSL is also capable of carrying user data traffic when necessary. Thus, the VSL has a dual purpose, supporting system control synchronization and a data link.

The VSL link is treated as a systems control link and encapsulates all traffic into a special system header called the Virtual Switch Header (VSH).

Does that explain more ?

Thanks