delanajero wrote: » I just discovered something at work earlier. So I work with ASR1000 as part of our core and I was doing a config for a customer wherein as per their request would like to filter a certain subnet to be received by their CE. Since there are other tails terminating on the same VRF and router, I decided to do a peer-group. I decided to use a prefix-list/route-map to filter out the advertised prefix but later on for simplicity i decided to use a distribute list. Upon application of the config, I noticed that when neighbors are in a peer-group I can't apply a route-map filtering and distribute list per neighbor unless i give each neigh its own peer-group. I originally thought that peer-groups where there to group attributes ie remote-as, activate, maximum prefix etc. So to make my filter-list work I had to remove them from a peer-group and it worked.
delanajero wrote: » It just occurred to me, what would be the use case of an IP over IP tunnel, why would you use that over a GRE considering it can only tunnel ipv4?
gorebrush wrote: » Don't feel too bad if you run into a topic you aren't feeling. Especially one like Multicast. I've never run into it in production (aside from the use of the multicast groups in routing protocols of course) but there are only a few scenarios you'll see it in use, I.e. video delivery, trading etc. Also, and this goes for everyone really - don't discount "old" books - some of the older books are still the definitive resources for some topics - especially Multicast because it's mostly unchanged over the years.