6509-E VSS Upgrade question

[Scott Conklin]

Hi, I am planning on upgrading my 6509s to use VSS within the next few weeks.  I have checked all of the hardware and software prerequisites, and we are good to go from that perspective.

I do have more of a procedural question- my switches are already configured and in production, VLANs, HSRP (3 IP addresses per VLAN- 1 per switch plus virtual IP), etc.  Does the VSS upgrade take all of this into account and rewrite the configuration correctly, or should I plan on redoing the entire config for the switches after the upgrade?

[Reza Sharifi]

Hi Scott,

I would plan in redoing the config, as most of the interface configs will change.  For example, if the current switch uses port 1/1 to connect to a server, after upgrading to VSS, the port will need to be change to 1/1/1 (switch 1 blade 1 port 1)

If you are connecting the same server to switch 2, the port assignment will be 2/1/1 (switch 2 blade 1 port 1).

Also, you would need to delete all your HSRP config, as not needing HSRP or VRRP is one of the benefits of VSS.

Good Luck

HTH

[Scott Conklin]

Thanks for the reply.  Would you recommend that I delete the HSRP config before i perform the VSS upgrade?  Or after the VSS upgrade, after the reload, does the HSRP config get deleted?

[Reza Sharifi]

I would just delete it before you convert it to VSS

HTH

[Scott Conklin]

Ok, just so I'm clear, your advice would be to back up the config (which I already have, and will do again right before the upgrade), erase the config on both switches, perform the VSS upgrade, and then put the new config in place, removing all unnecessary config such as HSRP?

And thanks for your help thus far.

[Reza Sharifi · Accepted solution]

That is correct. Also, if you are using Sup-2T, it uses PFC4 and some of the QOS commands have changed.  So you may have to redo some of you QOS parameters.

HTH 

[Scott Conklin]

Great, thanks again for all of your input.