Hi everybody
Please consider the following:
R1----egp(bgp)--------R2
R1 routing table:
172.16.0.0/16 is variably subnetted, 4 subnets, 3 masks
C 172.16.15.160/30 is directly connected, Serial0/0
C 172.16.15.128/27 is directly connected, Ethernet0/0
C 172.16.15.254/32 is directly connected, Loopback0
C 172.16.15.64/27 is directly connected, Ethernet0/1
router bgp 1
network 172.16.0.0
neighbor 172.16.15.162 remote-as 2
Where 172.16.15.162 is ip address of R2 connected to R1.
R1#show ip bgp
BGP table version is 8, local router ID is 172.16.15.254
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 172.16.0.0 0.0.0.0 0 32768 i
The " i" indicates prefix 172.16.0.0 is learned via network commnad.
Let check out the bgp routing table on R2
B#show ip bgp
BGP table version is 4, local router ID is 172.16.16.254
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 172.16.0.0 172.16.15.161 0 0 1 i
Based on origin codes, we should have gotten" e" not" i" because 172.16.0.0 is learned via egp from R1.
My understanding is origin codes tells us how the route was learned by bgp. For example " i" indicates the route is learned via network command, " ?" indicates the route is redistributedand "e" indicates the toute is learned via egp.
If my understanding is correct, We should have gotten " e" for 172.16.0.0 as R2 learned this route via egp from R1.
Any input will be greatly appreciated.
thanks and havea good weekend.
