Good day. I've been having a problem with my cisco routers (7600s) where sub-interfaces that we create for ldp tunnels are added automatically to the main ospf process as no passive when created. In order, here is how to reproduce the issue:
- Configure ospf process as "passive-interface default"
- Configure interfaces that have to be active as "no passive-interface blah"
- ospf works as expected.
- Create new sub- interface somewhere with encapsulation on a certain vlan for xconnect.
- New sub-interface gets added as "no passive-interface" in main ospf process.
- When adding a new port-channel interface, behavior is the same.
Is that normal for cisco, should I continue removing sub-interfaces manually every time from the ospf process?
I'll be happy to provide any additional information if needed.
I had the same experience with IS-IS on C7600 with 12.2(18)SXF with a previous customer
In our case interfaces associated to a VRF were advertised in global routing table!
We removed passive-interface default on all nodes
I personally consider a behaviour like the one I have described a SW bug and yours looks like similar
Hope to help
It seems like the general consensus that this is in fact a sw bug. I'll wait to see if anybody else has another solution before letting is go. The oly problem that this causes me is the addition of sub-ifs in ospf, which cannot do any real harm since they have no ip address.
Thanks for replying.
quite interesting. Ozguler was right