[c-nsp] tag-switching advertise-tags for?

[Oliver Boehmer (oboehmer)]

Jon Lewis <> wrote on Monday, October 24, 2005 7:14 PM:

> If I wanted to use MPLS/tag-switching only for the transport of MPLS
> VPN traffic, leaving all other IP traffic routed rather that
> tag-switched, could I use some invocation of tag-switching
> advertise-tags for do this? 

yes:

no tag-switching advertise-tags
tag-switching advertise-tags for ACL

where ACL matches all your PE's loopbacks used for BGP next-hops.

> Does tag-switching advertise-tags for <acl number> apply only to main
> table IP traffic, or would it also affect tag advertisement for
> connected vpnv4 vrf prefixes?

No, it only limits labels advertised by LDP. MP-BGP advertised labels
for VPNv4 prefixes is not affected.

> Will interfaces connecting 2 routers with "tag-switching ip"
> configured tag switch tagged packets and "ip route / cef switch"
> non-tagged packets? 

yes.

	oli