NOTE
redistribute ～ matchで再配送している経路に対して、さらにroute-mapで取捨選択したい
DIAGRAM
VERIFICATION
この時点ではR1にはinternal と type 1だけ再配送
R2#sh ip ro os | b Gate
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
O 10.0.0.3/32 [110/2] via 10.2.3.3, 00:06:10, FastEthernet0/1
O E1 192.168.1.0/24 [110/21] via 10.2.3.3, 00:06:10, FastEthernet0/1
O E2 192.168.2.0/24 [110/20] via 10.2.3.3, 00:01:27, FastEthernet0/1
O E1 192.168.3.0/24 [110/21] via 10.2.3.3, 00:06:10, FastEthernet0/1
O E2 192.168.4.0/24 [110/20] via 10.2.3.3, 00:01:27, FastEthernet0/1
R2#
R2#sh ip bgp nei 10.1.2.1 adv | b Network
Network Next Hop Metric LocPrf Weight Path
*> 10.0.0.2/32 0.0.0.0 0 32768 ?
*> 10.0.0.3/32 10.2.3.3 2 32768 ?
*> 10.2.3.0/24 0.0.0.0 0 32768 ?
*> 192.168.1.0 10.2.3.3 21 32768 ?
*> 192.168.3.0 10.2.3.3 21 32768 ?
Total number of prefixes 5
R1#sh ip bgp nei 10.1.2.2 route | b Network
Network Next Hop Metric LocPrf Weight Path
*> 10.0.0.2/32 10.1.2.2 0 0 65002 ?
*> 10.0.0.3/32 10.1.2.2 2 0 65002 ?
*> 10.2.3.0/24 10.1.2.2 0 0 65002 ?
*> 192.168.1.0 10.1.2.2 21 0 65002 ?
*> 192.168.3.0 10.1.2.2 21 0 65002 ?
Total number of prefixes 5
ここでroute-map を使い、192.168.1.0/24以外の4つだけ広報したい
R2(config)#ip prefix TEST-PREFIX s 10 deny 192.168.1.0/24 R2(config)#ip prefix TEST-PREFIX s 1000 permit 0.0.0.0/0 le 32 R2(config)# R2(config)#route-map TEST-MAP R2(config-route-map)# match ip add prefix TEST-PREFIX R2(config-route-map)# R2(config-route-map)#router bgp 65002 R2(config-router)# redist os 65002 match int ext 1 route-map TEST-MAP R2(config-router)# R2(config-router)#do clear ip bgp * soft R2(config-router)#
R2#sh ip bgp nei 10.1.2.1 adv | b Network
Network Next Hop Metric LocPrf Weight Path
*> 10.0.0.2/32 0.0.0.0 0 32768 ?
*> 10.0.0.3/32 10.2.3.3 2 32768 ?
*> 10.2.3.0/24 0.0.0.0 0 32768 ?
*> 192.168.2.0 10.2.3.3 20 32768 ?
*> 192.168.3.0 10.2.3.3 21 32768 ?
*> 192.168.4.0 10.2.3.3 20 32768 ?
Total number of prefixes 6
R2#
R1#sh ip bgp nei 10.1.2.2 route | b Network
Network Next Hop Metric LocPrf Weight Path
*> 10.0.0.2/32 10.1.2.2 0 0 65002 ?
*> 10.0.0.3/32 10.1.2.2 2 0 65002 ?
*> 10.2.3.0/24 10.1.2.2 0 0 65002 ?
*> 192.168.2.0 10.1.2.2 20 0 65002 ?
*> 192.168.3.0 10.1.2.2 21 0 65002 ?
*> 192.168.4.0 10.1.2.2 20 0 65002 ?
Total number of prefixes 6
R1#
残念ながらroute-map 併用するとその条件に従い、match は無視されるらしい(併用された状態？)
CONFIGURATION
hostname R1 ! interface Loopback0 ip address 10.0.0.1 255.255.255.255 ! interface FastEthernet0/0 no ip address shutdown ! interface FastEthernet0/1 ip address 10.1.2.1 255.255.255.0 no shutdown ! router bgp 65001 bgp router-id 10.0.0.1 neighbor 10.1.2.2 remote-as 65002 ! end
hostname R2 ! interface Loopback0 ip address 10.0.0.2 255.255.255.255 ip ospf 65002 area 0 ! interface FastEthernet0/0 ip address 10.1.2.2 255.255.255.0 no shutdown ! interface FastEthernet0/1 ip address 10.2.3.2 255.255.255.0 ip ospf 65002 area 0 no shutdown ! router ospf 65002 router-id 10.0.0.2 ! router bgp 65002 bgp router-id 10.0.0.2 redistribute ospf 65002 match internal external 1 neighbor 10.1.2.1 remote-as 65001 ! end
hostname R3 ! interface Loopback0 ip address 10.0.0.3 255.255.255.255 ip ospf 65002 area 0 ! interface Loopback1 ip address 192.168.1.3 255.255.255.0 ! interface Loopback2 ip address 192.168.2.3 255.255.255.0 ! interface Loopback3 ip address 192.168.3.3 255.255.255.0 ! interface Loopback4 ip address 192.168.4.3 255.255.255.0 ! interface FastEthernet0/0 ip address 10.2.3.3 255.255.255.0 ip ospf 65002 area 0 no shutdown ! interface FastEthernet0/1 no ip address shutdown ! router ospf 65002 router-id 10.0.0.3 redistribute connected subnets route-map CON-INTO-OSPF ! route-map CON-INTO-OSPF permit 10 match interface Loopback1 Loopback3 set metric-type type-1 ! route-map CON-INTO-OSPF permit 20 match interface Loopback2 Loopback4 set metric-type type-2 ! end
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