Stefan, I was just hunting through your blog for ideas when I saw your post :-) Thanks for jumping in. A few responses in-line below.....
On Tue, 24 Apr 2012, Stefan Fouant wrote:
If that adjacency goes down, a simple floating static (static route w/ higher preference than the dynamic BGP/IS-IS route) can be used pointing to next-table will do the trick. No need to used Logical-Tunnels or use auto-export.
If my two routers were directly connected all of the time, this would be fine. But I'm also thinking of the case of when there might be another L3 hop between the two routers. I guess I could insert another floating static on the third router, but that just seemed to add a little more complexity to me. I was hoping for a way to just let the dynamic routing protocols do the work for me instead of fooling with a bunch of statics with filter-based forwarding. Don't get me wrong, I like FBF. I was just hoping to leverage dynamic routing more.
Of course, in your case you've got not just two VRFs but also an East and West path which further complicates things - why not just connect the MX West device into your L2 Packet Scrubber as well and keep things the same on both the East and West device so that you can take full advantage of two planes. This will keep configurations uniform regardless of whether traffic comes in on the East or West devices.
I should have given the reason why I do not put the L2 scrubber between the two routers: conservation of fiber. I already have fiber connecting the routers in different wiring centers for traffic that does not need to be scrubbed. Chewing up another set of strands is much more expensive than simply connecting both sides of the L2 scrubber to just one router in the same rack.
Clarke Morledge College of William and Mary Information Technology - Network Engineering Jones Hall (Room 18) Williamsburg VA 23187 _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
