127.0.0.0/8 Direct 0 0 127.0.0.1 InLoop0 127.0.0.1/32 Direct 0 0 127.0.0.1 InLoop0
Router A和Router B，Router B和Router C之间应建立起OSPF邻居关系，执行display ospf peer命令可以看到邻居达到FULL状态。以Router A为例： [RouterA] display ospf peer
OSPF Process 1 with Router ID 1.1.1.9 Neighbors
Area 0.0.0.0 interface 10.1.1.1(Serial1/0)'s neighbors Router ID: 2.2.2.9 Address: 10.1.1.2 GR State: Normal State: Full Mode:Nbr is Master Priority: 1 DR: None BDR: None MTU: 1500 Dead timer due in 39 sec Neighbor is up for 00:02:13 Authentication Sequence: [ 0 ]
(3) 配置MPLS基本能力，并使能# 配置Router A。 [RouterA] mplslsr-id 1.1.1.9 [RouterA] mpls [RouterA-mpls] quit [RouterA] mplsldp [RouterA-mpls-ldp] quit [RouterA] interface serial 1/0 [RouterA-Serial1/0] mpls [RouterA-Serial1/0] mplsldp [RouterA-Serial1/0] quit # 配置Router B。 [RouterB] mplslsr-id 2.2.2.9 [RouterB] mpls [RouterB-mpls] quit [RouterB] mplsldp [RouterB-mpls-ldp] quit [RouterB] interface serial 1/0 [RouterB-Serial1/0] mpls [RouterB-Serial1/0] mplsldp [RouterB-Serial1/0] quit [RouterB] interface serial 1/1 [RouterB-Serial1/1] mpls [RouterB-Serial1/1] mplsldp [RouterB-Serial1/1] quit # 配置Router C。 [RouterC] mplslsr-id 3.3.3.9 [RouterC] mpls [RouterC-mpls] quit
LDP
[RouterC] mplsldp [RouterC-mpls-ldp] quit [RouterC] interface serial 1/0 [RouterC-Serial1/0] mpls [RouterC-Serial1/0] mplsldp [RouterC-Serial1/0] quit
完成上述配置后，Router A和Router B、Router B和Router C之间的本地LDP会话建立成功。 在各设备上执行display mplsldp session命令，可以看到LDP会话的建立情况；执行display mplsldp peer命令，可以看到LDP的对等体情况。以Router A为例： [RouterA] display mplsldp session LDP Session(s) in Public Network Total number of sessions: 1
---------------------------------------------------------------- Peer-ID Status LAM SsnRole FT MD5 KA-Sent/Rcv ---------------------------------------------------------------- 2.2.2.9:0 Operational DU Passive Off Off 5/5 ---------------------------------------------------------------- LAM : Label Advertisement Mode FT : Fault Tolerance [RouterA] display mplsldp peer LDP Peer Information in Public network Total number of peers: 1
----------------------------------------------------------------- Peer-ID Transport-Address Discovery-Source ---------------------------------------------------------------- 2.2.2.9:0 2.2.2.9 Serial1/0
----------------------------------------------------------------
(4) 配置远端LDP会话
# 配置Router A。
[RouterA] mplsldp remote-peer peerc
[RouterA-mpls-ldp-remote-peerc] remote-ip 3.3.3.9 [RouterA-mpls-ldp-remote-peerc] quit # 配置Router C。
[RouterC] mplsldp remote-peer peera
[RouterC-mpls-ldp-remote-peera] remote-ip 1.1.1.9 [RouterC-mpls-ldp-remote-peera] quit
完成上述配置后，在Router A上查看LDP会话的建立情况和LDP的对等体情况，可以看到增加了与Router C的远端LDP会话。
[RouterA] display mplsldp session LDP Session(s) in Public Network Total number of sessions: 2
---------------------------------------------------------------- Peer-ID Status LAM SsnRole FT MD5 KA-Sent/Rcv ----------------------------------------------------------------
2.2.2.9:0 Operational DU Passive Off Off 35/35 3.3.3.9:0 Operational DU Passive Off Off 8/8 ---------------------------------------------------------------- LAM : Label Advertisement Mode FT : Fault Tolerance [RouterA] display mplsldp peer LDP Peer Information in Public network Total number of peers: 2
----------------------------------------------------------------- Peer-ID Transport-Address Discovery-Source ----------------------------------------------------------------- 2.2.2.9:0 2.2.2.9 Serial1/0
3.3.3.9:0 3.3.3.9 Remote Peer : peerc
-----------------------------------------------------------------