- Silver, 250 points or more
hello l have a question about prefix list with 3 routers. l configure 3 router R-1 as the branch, R-2 as the WAN and R-3 the head office (with a lot of loopbacks).
l want to configure prefix list on the WAN(R-2) to block all address with /30 and some of the loopbacks from displaying on the branch office routing table.
it works fine but the problem is, l cannot ping from the branch to any of the loopback. the ICMP does't pass through WAN router.
it works fine with 2 routers as the configuration is done on the head office that will display and work fine.
It looks like its an expected behavior as per your configuration. R3 doesn't have information about any of the prefixes of R1 as per the routing table entry. For R3 to reach R1, atleast we need a default-route which is not available.
I EIGRP advertising the default route as "network 0.0.0.0" won't work until you have a static route like ip route 0.0.0.0 0.0.0.0
Thanks & Regards,