RIPv2 Conditional Default Routing
I cant understand why I do "not" need to filter out default route on R4.
I tried this lab and, as mentioned in the configuration section, default route did not get installed in R4, but why?
-Path of G1.45: split horizon is enable on both R4 and R5, so default route advertisement from R4 will not reflect back by R5.
-Path of Tunnel0:split horizon is "disabled" on R5, so default route will reflect back to R4.
Therefore, by reflecting default route by R5 via tunnel0, I assumed R4 will install default route.
My assumption why R4 did not installed reflected default route is because reflected RIP advertisement packet "next hop" field
has its own(R4) ip address, and therefore R4 ignored it. Is my assumption correct?
(I tried to find document that states my assumption but I could not find it)
Another issue I found while debugging this issue is that "debug ip rip" will not display some of the prefix received by neighbor.
It seems like it will not show the prefix router itself ignored. (EX: Above default route, I confirmed its in the packet by wireshark, but
couldn't find it in debug).
Then, are there any way to check all the advertised prefix received by neighbor?