Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

stp root

We have 2 core switches connected to each other.core switch 1 acts as root for vlans 3,5,7 and switch 2 for 2,4,6.

we have a server with 2 interfaces to each core.server is in vlan 3.

Can i make core switch 2 to act as root only for this server?

SAM

2 REPLIES

Re: stp root

Hi

I think this is not possible as we cannot make a STP root switch for a particular end system it can be done on a per vlan basis.

Thanks

Mahmood

Hall of Fame Super Silver

Re: stp root

Hello Sam,

as explained by Mahmood this is not possible.

the root bridge is defined for each Vlan in PVST.

Note that the server will use the NICs in active/standby strategy so you cannot have both NICs active.

if the server tries to use both NICs (active/active) you get a lot of errors of type MAC address flapping.

to use both NICs they should be connected to a single switch and you should use etherchannel (LACP is recommended).

Hope to help

Giuseppe

107
Views
0
Helpful
2
Replies