BGP　ルーター　1対1　構成

CISCO BGPの設定

BGPの基本設定

設定イメージ


・インターフェース設定
R1への設定

interface GigabitEthernet8
ip address 100.0.0.1 255.255.255.0
duplex auto
speed auto

interface Vlan1
ip address 192.168.0.1 255.255.255.0

R2への設定

interface GigabitEthernet8
ip address 100.0.0.2 255.255.255.0
duplex auto
speed auto

interface Vlan1
ip address 172.16.0.1 255.255.255.0


・BGPの設定
R1への設定

router bgp 100
bgp log-neighbor-changes
network 192.168.0.0
neighbor 100.0.0.2 remote-as 200


R2への設定

router bgp 200
bgp log-neighbor-changes
network 172.16.0.0 mask 255.255.255.0
neighbor 100.0.0.1 remote-as 100

確認コマンド

show ip bgp 
show ip bgp neighbors
show ip bgp summary 
show ip route


・show ip route 

R2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override


・show ip bgp 

R2# show ip bgp
BGP table version is 5, local router ID is 172.16.0.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  172.16.0.0/24    0.0.0.0                  0         32768 i
 *>  192.168.0.0      100.0.0.1                0             0 100 i

※cisco 891を使用した場合、ルーターに端末およびL2SWなどが接続されていなければルーティングテーブルに記載が乗らない