Router_C#show crypto engine connection active
ID Interface IP-Address State Algorithm Encrypt Decrypt
6 Tunnel0 192.168.1.3 set HMAC_SHA+DES_56_CB 0 0
7 FastEthernet0 20.0.0.11 set HMAC_SHA+DES_56_CB 0 0
8 Tunnel0 192.168.1.3 set HMAC_SHA+DES_56_CB 0 0
2001 FastEthernet0 20.0.0.11 set 3DES+SHA 0 0
2002 Tunnel0 20.0.0.11 set 3DES+SHA 28 0
2004 Tunnel0 20.0.0.11 set 3DES+SHA 0 0
2005 Tunnel0 20.0.0.11 set 3DES+SHA 0 0
2007 Tunnel0 20.0.0.11 set 3DES+SHA 0 28
2008 FastEthernet0 20.0.0.11 set 3DES+SHA 0 0
各拠点で、「ISAKMP SA」、「IPSec SA」が確立されていることが分かります。
各ルータのルーティングテーブルを確認します。
●Router_Aのルーティングテーブル
Gateway of last resort is not set
C 20.0.0.0/8 is directly connected, FastEthernet0
O 172.17.0.0/16 [110/11121] via 192.168.1.2, 00:02:19, Tunnel0
C 172.16.0.0/16 is directly connected, Ethernet0
O 172.18.0.0/16 [110/11121] via 192.168.1.3, 00:02:19, Tunnel0
C 192.168.1.0/24 is directly connected, Tunnel0
●Router_Bのルーティングテーブル
Gateway of last resort is not set
C 20.0.0.0/8 is directly connected, FastEthernet0
C 172.17.0.0/16 is directly connected, Ethernet0
O 172.16.0.0/16 [110/11121] via 192.168.1.1, 00:02:51, Tunnel0
O 172.18.0.0/16 [110/11121] via 192.168.1.3, 00:02:51, Tunnel0
C 192.168.1.0/24 is directly connected, Tunnel0
●Router_Cのルーティングテーブル
Gateway of last resort is not set
C 20.0.0.0/8 is directly connected, FastEthernet0
O 172.17.0.0/16 [110/11121] via 192.168.1.2, 00:01:32, Tunnel0
O 172.16.0.0/16 [110/11121] via 192.168.1.1, 00:01:32, Tunnel0
C 172.18.0.0/16 is directly connected, Ethernet0
C 192.168.1.0/24 is directly connected, Tunnel0