[c-nsp] Limiting networks announced on special link of OSPF

[lists at hojmark.org]

> After setting up vlan3 interface on L3 module, I noticed
> catalyst6509-a and catalyst6509-b establish ospf neighbor
> relationship. And, route from 6509-b to some subnet on
> 6509-a point to vlan 3 and vlan8. but, i just don't want
> vlan3 on trunk link to carry any traffic beside those inside
> vlan3. 

You want the interface to be passive:

 router ospf X
   passive-interface vlan3

Or (typically easier on distribution switches) you could do:

 router ospf X
   passive default
   no passive vl8

See http://tinyurl.com/ak9nk

HTH,
-A