[BGP] best path selection_9
9. lowest Peer IP
Originator ID를 동일하게 하기 위해 R3, R4에 router-id = 10.10.10.10으로 동일하게 설정
|
*A:R2# show router bgp routes =============================================================================== BGP Router ID:2.2.2.2 AS:4766 Local AS:4766 =============================================================================== Legend - Status codes : u - used, s - suppressed, h - history, d - decayed, * - valid l - leaked, x - stale, > - best, b - backup, p - purge Origin codes : i - IGP, e - EGP, ? - incomplete
=============================================================================== BGP IPv4 Routes =============================================================================== Flag Network LocalPref MED Nexthop (Router) Path-Id Label As-Path ------------------------------------------------------------------------------- u*>i 20.1.11.0/24 100 None 30.1.1.1 None - 500 *i 20.1.11.0/24 100 None 30.1.1.2 None - 500 ------------------------------------------------------------------------------- Routes : 2 =============================================================================== *A:R2# show router bgp routes 20.1.11.0/24 detail =============================================================================== BGP Router ID:2.2.2.2 AS:4766 Local AS:4766 =============================================================================== Legend - Status codes : u - used, s - suppressed, h - history, d - decayed, * - valid l - leaked, x - stale, > - best, b - backup, p - purge Origin codes : i - IGP, e - EGP, ? - incomplete
=============================================================================== BGP IPv4 Routes =============================================================================== Original Attributes
Network : 20.1.11.0/24 Nexthop : 30.1.1.1 Path Id : None From : 3.3.3.3 Res. Nexthop : 10.1.13.2 Local Pref. : 100 Interface Name : Te1/1/3 Aggregator AS : None Aggregator : None Atomic Aggr. : Not Atomic MED : None AIGP Metric : None Connector : None Community : No Community Members Cluster : No Cluster Members Originator Id : None Peer Router Id : 10.10.10.10 Fwd Class : None Priority : None Flags : Used Valid Best IGP Route Source : Internal AS-Path : 500 Route Tag : 0 Neighbor-AS : 500 Orig Validation: NotFound Source Class : 0 Dest Class : 0 Add Paths Send : Default Last Modified : 00h00m20s
Modified Attributes
Network : 20.1.11.0/24 Nexthop : 30.1.1.1 Path Id : None From : 3.3.3.3 Res. Nexthop : 10.1.13.2 Local Pref. : 100 Interface Name : Te1/1/3 Aggregator AS : None Aggregator : None Atomic Aggr. : Not Atomic MED : None AIGP Metric : None Connector : None Community : No Community Members Cluster : No Cluster Members Originator Id : None Peer Router Id : 10.10.10.10 Fwd Class : None Priority : None Flags : Used Valid Best IGP Route Source : Internal AS-Path : 500 Route Tag : 0 Neighbor-AS : 500 Orig Validation: NotFound Source Class : 0 Dest Class : 0 Add Paths Send : Default Last Modified : 00h00m24s
------------------------------------------------------------------------------- Original Attributes
Network : 20.1.11.0/24 Nexthop : 30.1.1.2 Path Id : None From : 4.4.4.4 Res. Nexthop : 10.1.13.2 Local Pref. : 100 Interface Name : Te1/1/3 Aggregator AS : None Aggregator : None Atomic Aggr. : Not Atomic MED : None AIGP Metric : None Connector : None Community : No Community Members Cluster : No Cluster Members Originator Id : None Peer Router Id : 10.10.10.10 Fwd Class : None Priority : None Flags : Valid IGP TieBreakReason : PeerIP Route Source : Internal AS-Path : 500 Route Tag : 0 Neighbor-AS : 500 Orig Validation: NotFound Source Class : 0 Dest Class : 0 Add Paths Send : Default Last Modified : 00h00m21s
Modified Attributes
Network : 20.1.11.0/24 Nexthop : 30.1.1.2 Path Id : None From : 4.4.4.4 Res. Nexthop : 10.1.13.2 Local Pref. : 100 Interface Name : Te1/1/3 Aggregator AS : None Aggregator : None Atomic Aggr. : Not Atomic MED : None AIGP Metric : None Connector : None Community : No Community Members Cluster : No Cluster Members Originator Id : None Peer Router Id : 10.10.10.10 Fwd Class : None Priority : None Flags : Valid IGP TieBreakReason : PeerIP Route Source : Internal AS-Path : 500 Route Tag : 0 Neighbor-AS : 500 Orig Validation: NotFound Source Class : 0 Dest Class : 0 Add Paths Send : Default Last Modified : 00h00m25s
------------------------------------------------------------------------------- ------------------------------------------------------------------------------- Routes : 2 =============================================================================== |
|
BGP Summary =============================================================================== Legend : D - Dynamic Neighbor =============================================================================== Neighbor Description AS PktRcvd InQ Up/Down State|Rcv/Act/Sent (Addr Family) PktSent OutQ ------------------------------------------------------------------------------- 1.1.1.1 4766 18814 0 01d00h19m 0/0/1 (IPv4) 3381 0 3.3.3.3 4766 18822 0 00h04m32s 1/1/1 (IPv4) 303 0 4.4.4.4 4766 18163 0 00h04m30s 1/0/1 (IPv4) 204 0 ------------------------------------------------------------------------------- |
중 peer ip인 3.3.3.3과 4.4.4.4 중 작은 쪽인 3.3.3.3을 타게 됩니다.