Subj : Connectivity problems?
To   : Michiel van der Vlist
From : Markus Reschke
Date : Tue Apr 22 2014 20:15:54

Hi Michiel!

Apr 21 22:12 2014, Michiel van der Vlist wrote to Markus Reschke:

 MvdV> "IGP problem"? Please explain.

= Interior Gateway Protocol. For the EGP (Exterior ...) some routers in a network generate a route for the address allocations, i.e. by a blackhole with a low weigth. Inside the network all routers distribute their known local networks via the IGP. Those local networks are more specific or the IGP has a higher weigth, in case the local network matches the blackhole. Based on the actual network design it's possible that an internal IGP  problem causes a broken routing for some users while other users don't have any problem at all. If the routing runs directly via the tunnel router everything seems fine, but traffic via the router generating the EGP route is blackholed (if the router doesn't know about the local networks of the tunnel router).

Regards,
Markus

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