BGP As prepend
R3(config-router-bgp)#show ip bgp
BGP routing table information for VRF default
Router identifier 192.168.23.3, local AS number 2
Route status codes: * - valid, > - active, # - not installed, E - ECMP head, e - ECMP
S - Stale, c - Contributing to ECMP, b - backup, L - labeled-unicast
Origin codes: i - IGP, e - EGP, ? - incomplete
AS Path Attributes: Or-ID - Originator ID, C-LST - Cluster List, LL Nexthop - Link Local Nexthop
Network Next Hop Metric LocPref Weight Path
* > 1.1.1.0/24 192.168.23.2 0 100 0 1 i
* 1.1.1.0/24 192.168.13.1 0 100 0 1 1 1 1 1 i
R1
interface Ethernet1
no switchport
ip address 192.168.13.1/24
interface Loopback0
ip address 1.1.1.1/24
ip routing
!
route-map PREPEND permit 10
set as-path prepend 1 1 1 1
!
router bgp 1
router-id 1.1.1.1
neighbor 192.168.13.3 remote-as 2
neighbor 192.168.13.3 route-map PREPEND out
network 1.1.1.0/24
R2
interface Ethernet1
no switchport
ip address 192.168.23.2/24
!
interface Loopback0
ip address 1.1.1.1/24
!
ip routing
!
router bgp 1
router-id 2.2.2.2
neighbor 192.168.23.3 remote-as 2
network 1.1.1.0/24
R3
interface Ethernet1
no switchport
ip address 192.168.13.3/24
!
interface Ethernet2
no switchport
ip address 192.168.23.3/24
!
ip routing
!
router bgp 2
neighbor 192.168.13.1 remote-as 1
neighbor 192.168.23.2 remote-as 1