[c-nsp] 7600/6500 L3 vs SVI

[sthaug at nethelp.no]

> >What config option am I overlooking that lets me configure the SVI as
> >interface vlan2000, yet have connected switches think it's vlan 1?  I
> >assume this is possible since it's what the 6500 does automatically when I
> >configure the port as a layer 3 port.
> 
> Set the port to be an access port and turn off CDP since it will 
> complain of vlan mismatch.
> When the port is an L3 port CDP has no knowledge of the vlan, where 
> with an switchport it does.

When I was looking into these things (a couple of years ago) I believe
I concluded that the VLAN id was actually also encoded into the STP
BPDU, and IOS reacted/complained when the VLANs were different. I have
not checked this lately.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no