OSPF summary-add not-adv
前提
・PE-CE接続はOSPF
・CEのgi0/2どうしの接続はbackup用
Before
iosv-2#sh ip route ospf | b Gate
Gateway of last resort is not set
11.0.0.0/32 is subnetted, 1 subnets
O E2 11.11.11.11 [110/1] via 12.1.1.1, 00:06:43, GigabitEthernet0/0
55.0.0.0/32 is subnetted, 1 subnets
O E2 55.55.55.55 [110/1] via 12.1.1.1, 00:06:43, GigabitEthernet0/0
57.0.0.0/24 is subnetted, 1 subnets
O 57.1.1.0 [110/3] via 12.1.1.1, 00:06:43, GigabitEthernet0/0
O 192.168.3.0/24 [110/4] via 12.1.1.1, 00:06:43, GigabitEthernet0/0
iosv-7#sh ip ro ospf | b Gate
Gateway of last resort is not set
O 2.0.0.0/8 [110/4] via 57.1.1.5, 00:07:02, GigabitEthernet0/0
11.0.0.0/32 is subnetted, 1 subnets
O E2 11.11.11.11 [110/1] via 57.1.1.5, 00:19:23, GigabitEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O 12.1.1.0 [110/3] via 57.1.1.5, 00:07:12, GigabitEthernet0/0
55.0.0.0/32 is subnetted, 1 subnets
O E2 55.55.55.55 [110/1] via 57.1.1.5, 00:19:28, GigabitEthernet0/0
O 192.168.2.0/24 [110/4] via 57.1.1.5, 00:07:02, GigabitEthernet0/0sham-link用にPEで作ったLoopbackがO E2としてCEに広告されてしまっている。
設定
iosv-1(config)#router ospf 100 vrf aaa
iosv-1(config-router)#summary-address 11.11.11.11 255.255.255.255 not-advertise
iosv-1(config-router)#summary-address 55.55.55.55 255.255.255.255 not-advertise
iosv-5(config)#router ospf 100 vrf aaa
iosv-5(config-router)#summary-address 11.11.11.11 255.255.255.255 not-advertise
iosv-5(config-router)#summary-address 55.55.55.55 255.255.255.255 not-advertise After
iosv-2#sh ip route ospf | b Gate
Gateway of last resort is not set
57.0.0.0/24 is subnetted, 1 subnets
O 57.1.1.0 [110/3] via 12.1.1.1, 00:09:37, GigabitEthernet0/0
O 192.168.3.0/24 [110/4] via 12.1.1.1, 00:09:37, GigabitEthernet0/0
iosv-7#sh ip ro ospf | b Gate
Gateway of last resort is not set
O 2.0.0.0/8 [110/4] via 57.1.1.5, 00:11:03, GigabitEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O 12.1.1.0 [110/3] via 57.1.1.5, 00:11:13, GigabitEthernet0/0
O 192.168.2.0/24 [110/4] via 57.1.1.5, 00:11:03, GigabitEthernet0/0sham-link用のLoopbackがCEに広告されなくなった。
ping check
inserthostname-here:~$ ping 192.168.3.1
PING 192.168.3.1 (192.168.3.1): 56 data bytes
64 bytes from 192.168.3.1: seq=0 ttl=42 time=12.872 ms
64 bytes from 192.168.3.1: seq=1 ttl=42 time=10.492 ms
64 bytes from 192.168.3.1: seq=2 ttl=42 time=11.638 ms
^C
--- 192.168.3.1 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 10.492/11.667/12.872 ms
inserthostname-here:~$ traceroute 192.168.3.1
traceroute to 192.168.3.1 (192.168.3.1), 30 hops max, 46 byte packets
1 192.168.2.254 (192.168.2.254) 2.388 ms 2.926 ms 2.786 ms
2 12.1.1.1 (12.1.1.1) 3.560 ms 3.118 ms 5.984 ms
3 13.1.1.3 (13.1.1.3) 15.605 ms 11.071 ms 12.046 ms
4 34.1.1.4 (34.1.1.4) 13.168 ms 11.345 ms 23.358 ms
5 57.1.1.5 (57.1.1.5) 12.306 ms 12.568 ms 12.513 ms
6 57.1.1.7 (57.1.1.7) 19.690 ms 12.774 ms 14.329 ms
7 192.168.3.1 (192.168.3.1) 15.537 ms 11.506 ms 14.185 ms問題なし。