Hello- I was practising a lab yesterday using 2 routers and a host off each router. Router A's PC had a 172.16.20.0 network Router A to Router B had a point to point link 172.16.1.0 network(uisng addresses 172.16.1.1 and 172.16.1.2) Then the host from Router B used
172.16.1.129 as its default gateway and 172.16.1.130 as it address.Using two network statements 172.16.1.0 0.0.0.3 area 0 (point to point) and
172.16.1.0 0.0.0.63 for the Host network.For some reason Router Bs host coulde ping everywhere but router A , and the host could not ping past Router Bs serial address- 172.16.1.129 was unreachable
In the show ip route ,Router B had learnt its routes-whereas Router A only had directly connected routes available. When a default route was put in to Router A 0.0.0.0 0.0.0.0 s0 , connectivity was gained. What I couldnt understand was why Router B knew routes,when Router B didnt.
Thanks alot-hope its clear-it was a Cisco Lab for Semester 3