VRFルートリーク(MP-BGP)

(config)#router bgp <AS>
(config-router)#bgp router-id <router-id>
(config-router)#address-family ipv4 vrf <vrf-name>
(config-router-af)#redstirbitute <routing-process>
(config-router-af)#network <network> mask <subnetmask>

<AS> : AS番号
<router-id> : BGPルータID
<vrf-name> : VRF名
<routing-process> : 再配送元のルーティングプロセス
<network> : ネットワークアドレス
<subnetmask> : サブネットマスク

(config)#ip vrf <vrf-name>
(config-vrf)#rd <RD>
(config-vrf)#route-target import <RT>
(config-vrf)#route-target export <RT>
(config-vrf)#export map <route-map-name>

<vrf-name> : VRF名
<RD> : RD
<RT> : RT
<route-map-name> : ルートマップ名

(config)#route-map <map-name> {permit|deny} [<seq>]
(config-route-map)#match <condition>
(config-route-map)#set extcommunity rt <RT> [additive]

<map-name> : ルートマップ名
<seq> : シーケンス番号
<condition> : 追加のRTを付加するルートの条件
<RT> : RT

R1#show bgp vpnv4 unicast all
BGP table version is 27, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf AAA)
*> 172.16.0.0/24    0.0.0.0                  0         32768 ?
*> 172.16.1.0/24    172.16.0.3          409600         32768 ?
*> 192.168.0.0      0.0.0.0                  0         32768 ?
*> 192.168.1.0      192.168.0.2             11         32768 ?
*> 192.168.2.0      192.168.0.2             11         32768 ?
Route Distinguisher: 2:100 (default for vrf BBB)
*> 172.16.0.0/24    0.0.0.0                  0         32768 ?
*> 172.16.1.0/24    172.16.0.3          409600         32768 ?
*> 172.16.2.0/24    172.16.0.3          409600         32768 ?
*> 192.168.0.0      0.0.0.0                  0         32768 ?
*> 192.168.1.0      192.168.0.2             11         32768 ?

R1#show bgp vpnv4 unicast all 192.168.1.0
BGP routing table entry for 1:100:192.168.1.0/24, version 19
Paths: (1 available, best #1, table AAA)
  Not advertised to any peer
  Local
    192.168.0.2 from 0.0.0.0 (1.1.1.1)
      Origin incomplete, metric 11, localpref 100, weight 32768, valid, sourced, best
      Extended Community: RT:1:100 RT:100:100
        OSPF DOMAIN ID:0x0005:0x000000010200 OSPF RT:0.0.0.0:2:0
        OSPF ROUTER ID:1.1.1.1:0
      mpls labels in/out 23/nolabel
BGP routing table entry for 2:100:192.168.1.0/24, version 22
Paths: (1 available, best #1, table BBB)
  Not advertised to any peer
  Local, imported path from 1:100:192.168.1.0/24
    192.168.0.2 from 0.0.0.0 (1.1.1.1)
      Origin incomplete, metric 11, localpref 100, weight 32768, valid, external, best
      Extended Community: RT:1:100 RT:100:100
        OSPF DOMAIN ID:0x0005:0x000000010200 OSPF RT:0.0.0.0:2:0
        OSPF ROUTER ID:1.1.1.1:0

R1#show bgp vpnv4 unicast vrf AAA
BGP table version is 27, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network          Next Hop            Metric LocPrf Weight Path
Route Distinguisher: 1:100 (default for vrf AAA)
*> 172.16.0.0/24    0.0.0.0                  0         32768 ?
*> 172.16.1.0/24    172.16.0.3          409600         32768 ?
*> 192.168.0.0      0.0.0.0                  0         32768 ?
*> 192.168.1.0      192.168.0.2             11         32768 ?
*> 192.168.2.0      192.168.0.2             11         32768 ?

R1#show ip route vrf AAA

Routing Table: AAA
Codes: 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

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 2 subnets
B       172.16.0.0 is directly connected, 01:37:26, FastEthernet0/1
B       172.16.1.0 [20/409600] via 172.16.0.3 (BBB), 01:37:26, FastEthernet0/1
C    192.168.0.0/24 is directly connected, FastEthernet0/0
O    192.168.1.0/24 [110/11] via 192.168.0.2, 01:47:55, FastEthernet0/0
O    192.168.2.0/24 [110/11] via 192.168.0.2, 01:47:55, FastEthernet0/0

R1#show ip vrf
  Name                             Default RD          Interfaces
  AAA                              1:100               Fa0/0
  BBB                              2:100               Fa0/1
R1#show ip vrf detail
VRF AAA; default RD 1:100; default VPNID 
  Interfaces:
    Fa0/0
  Connected addresses are not in global routing table
  Export VPN route-target communities
    RT:1:100
  Import VPN route-target communities
    RT:100:100               RT:1:100
  No import route-map
  Export route-map: ROUTE-LEAK-EX
  VRF label distribution protocol: not configured
  VRF label allocation mode: per-prefix
VRF BBB; default RD 2:100; default VPNID 
  Interfaces:
    Fa0/1
  Connected addresses are not in global routing table
  Export VPN route-target communities
    RT:2:100
  Import VPN route-target communities
    RT:100:100               RT:2:100
  No import route-map
  Export route-map: ROUTE-LEAK-EX
  VRF label distribution protocol: not configured
  VRF label allocation mode: per-prefix

R1#show route-map
route-map ROUTE-LEAK-EX, permit, sequence 10
  Match clauses:
    ip address (access-lists): 1
  Set clauses:
    extended community RT:100:100 additive
  Policy routing matches: 0 packets, 0 bytes
route-map ROUTE-LEAK-EX, permit, sequence 100
  Match clauses:
  Set clauses:
  Policy routing matches: 0 packets, 0 bytes