r2 is running ospf connected to r1, and (subnet 172.16.10.0/24)
r3 is running rip or eigrp connected to r1,(subnet 172.16.20.0/24)
having said that r1 is running two protocols and if i do show ip route at this point, all I will see
directly connected routes on r1, now
I do mutual redistribution on r1, Now I should see route network 172.16.20.0 on r2 as E2 route, and should also see 172.16.10.0 on r3 as R or EX on r3.
My question when redistribution happened on r1, technically r1 should look for either ospf or rip/eigrp networks in its routing table to redistribute, not directly connected networks. How does it pickup the directly connected routes and redistributes in each protocol knowing that one interface is running ospf while the other one is running rip or eigrp.
Or something close to that, and you want to know why the 172.16.10.0/24 route shows up in eigrp as an external, since it's a connected route, rather than an ospf route? Because when you put the network statement in ospf, ospf takes "ownership" of the route in the routing table, so eigrp "sees" this route as an ospf route. The "ownership bits" are inclusive, rather than exclusive, so only the existence of the ospf bit is checked when redistributing into eigrp, not the lack of existance of the other bits.
Thanks Russ! Good expalanation. That is what I was looking for. Somebody confused me by saying that when redistribution happens, router looks into the routing table and picks the routes if it sees as an ospf route or eigrp etc. When I did this in the lab I noticed that connected routes in redistrubtion router were also showing on r3 and r2. Now I know why?
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.