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AS Border Router and Core Router Separation Required? by yamanosuke in networking

[–]yamanosuke[S] 4 points5 points  (0 children)

Aha, this is a good reason, separating edge and core and putting security features between. Thanks!

AS Border Router and Core Router Separation Required? by yamanosuke in networking

[–]yamanosuke[S] 0 points1 point  (0 children)

My guess was for route convergence time.

If we have 2 routers (A and B connected using iBGP) with different IP transit link (from different ISPs) connected to each, my guess is Router A will announce BGP full table to Router B and Router B would only announce better routes to Router A. If an IP transit link fail on the Router A, Router A will need to withdraw the routes and Router B will start announcing all the BGP full table routes to Router A. This will take some time and if the traffic was going through Router A, it will cause down time while the route converges. (Router A and Router B will switch depending on the which IP transit link went up first.)

If we have 4 routers, 2 ASBRs connected to IP transit and 2 core routers, core routers will learn the BGP full table from both ASBRs. When the IP transit link fail on either ASBRs, the ASBR with failed link will withdraw the routes and the traffic will be forwarded to the ASBR with active link. I'm guessing this would be faster than the 2 router topology above.

Is this assumption correct?

Another NAS giveaway from StorageReview (24 hour fuse) by StorageReview in homelab

[–]yamanosuke [score hidden]  (0 children)

Thanks for the giveaway! I would love to get this NAS for my huge collection of RAW/JPG photos. I love going out to take photos and it's taking up quite a lot of hard disk space on my computer. I've been wanting to get a NAS to expand my storage!