[c-nsp] MPLS TE Autoroute with OSPF and IS-IS?

[Pete Templin]

Oliver Boehmer (oboehmer) wrote:

> oh, don't think this config is supported as you can't tell TE which of
> the two IGP's to use for CSPF. Apparently ISIS is used (as shown in your
> autoroute output, and I bet "show mpls traffic-eng topology" also refers
> to ISIS), and so I assume OSPF's AD of 110 wins over the ISIS routes
> (including the auto-routes) with AD=115 when it comes to route
> installation.

Correct, unfortunately.

> What does "show isis rib <prefix> <mask>" tell you for one of the
> prefixes you would expect to see auto-routed over the tunnel?

core1-dlls#sh isis rib 66.118.28.33 255.255.255.255

IPv4 local RIB for IS-IS process
66.118.28.33/32
   [115/L2/28] via 66.118.28.33(Tunnel432), from 66.118.28.33, tag 0, 
LSP[24/30]
   [115/L2/28] via 66.118.28.33(Tunnel431), from 66.118.28.33, tag 0, 
LSP[24/30]
   [115/L2/28] via 66.118.28.33(Tunnel403), from 66.118.28.33, tag 0, 
LSP[24/30]
   [115/L2/28] via 66.118.28.33(Tunnel402), from 66.118.28.33, tag 0, 
LSP[24/30]
   [115/L2/28] via 66.118.28.33(Tunnel401), from 66.118.28.33, tag 0, 
LSP[24/30]
   [115/L2/28] via 66.118.28.33(Tunnel433), from 66.118.28.33, tag 0, 
LSP[24/30]
core1-dlls#

Yep, ISIS wins.  The good news is the last two nodes needing a software 
upgrade got it this morning, so we'll be able to start changing 
administrative distance across the network very soon.

Thanks for the pointers!

pt