实验步骤
步骤1：完成EIGRP BGP 及宣告配置
步骤2：完成LDP 的配置
过程校验
步骤1：校验和理解LDP 邻居关系的发现和邻接关系的建立
R4#show mpls ldp discovery detail
Local LDP Identifier:
4.4.4.4:0
Discovery Sources:
Interfaces:
FastEthernet0/0 (ldp): xmit/recv
Enabled: Interface config
Hello interval: 5000 ms; Transport IP addr: 4.4.4.4
LDP Id: 5.5.5.5:0; no host route to transport addr
Src IP addr: 45.45.45.5; Transport IP addr: 5.5.5.5
Hold time: 15 sec; Proposed local/peer: 15/15 sec
Reachable via 5.5.5.0/24
FastEthernet0/1 (ldp): xmit/recv
Enabled: Interface config
Hello interval: 5000 ms; Transport IP addr: 4.4.4.4
LDP Id: 2.2.2.2:0; no host route to transport addr
Src IP addr: 24.24.24.2; Transport IP addr: 2.2.2.2
Hold time: 15 sec; Proposed local/peer: 15/15 sec
Reachable via 2.2.2.0/24
步骤2：校验邻接关系是否建立
R4#show mpls ldp neighbor
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 4.4.4.4:0
TCP connection: 2.2.2.2.646 - 4.4.4.4.58866
State: Oper; Msgs sent/rcvd: 32/33; Downstream
Up time: 00:18:54
LDP discovery sources:
FastEthernet0/1, Src IP addr: 24.24.24.2
Addresses bound to peer LDP Ident:
12.12.12.2 24.24.24.2 23.23.23.2 2.2.2.2
Peer LDP Ident: 5.5.5.5:0; Local LDP Ident 4.4.4.4:0
TCP connection: 5.5.5.5.55110 - 4.4.4.4.646
State: Oper; Msgs sent/rcvd: 32/33; Downstream
Up time: 00:18:28
LDP discovery sources:
FastEthernet0/0, Src IP addr: 45.45.45.5
Addresses bound to peer LDP Ident:
45.45.45.5 56.56.56.5 35.35.35.5 5.5.5.5
步骤3：校验LDP 的标签分配、分发、关联
3.1 查看LIB
R2
R2#show mpls ldp bindings
tib entry: 2.2.2.0/24, rev 4
local binding: tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 300
remote binding: tsr: 4.4.4.4:0, tag: 401
……………………………………
tib entry: 5.5.5.0/24, rev 10
local binding: tag: 203
remote binding: tsr: 3.3.3.3:0, tag: 302
remote binding: tsr: 4.4.4.4:0, tag: 403
…………………………………
R4
R4#show mpls ldp bindings
tib entry: 2.2.2.0/24, rev 4
local binding: tag: 401
remote binding: tsr: 2.2.2.2:0, tag: imp-null
remote binding: tsr: 5.5.5.5:0, tag: 500
…………………………
tib entry: 5.5.5.0/24, rev 10
local binding: tag: 403
remote binding: tsr: 2.2.2.2:0, tag: 203
remote binding: tsr: 5.5.5.5:0, tag: imp-null
R5#show mpls ldp bindings
tib entry: 2.2.2.0/24, rev 4
local binding: tag: 500
remote binding: tsr: 3.3.3.3:0, tag: 300
remote binding: tsr: 4.4.4.4:0, tag: 401
tib entry: 5.5.5.0/24, rev 10
local binding: tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 302
remote binding: tsr: 4.4.4.4:0, tag: 403
此时利用show mpls ldp neighbor 获取对端设备共享的绑定地址
利用show ip route 查看目标网络真实下一跳地址
确认拥有下一跳地址和绑定地址重样的设备远程标签被关联
3.2 查看LFIB 确认正确的理解和分析了标签关联过程
R2#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
200 400 35.35.35.0/24 0 Fa0/1 24.24.24.4
201 Pop tag 3.3.3.0/24 0 Se1/0 point2point
202 Pop tag 4.4.4.0/24 0 Fa0/1 24.24.24.4
203 403 5.5.5.0/24 0 Fa0/1 24.24.24.4
204 Pop tag 45.45.45.0/24 0 Fa0/1 24.24.24.4
R4#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
400 Pop tag 35.35.35.0/24 0 Fa0/0 45.45.45.5
401 Pop tag 2.2.2.0/24 8444 Fa0/1 24.24.24.2
402 501 3.3.3.0/24 0 Fa0/0 45.45.45.5
201 3.3.3.0/24 0 Fa0/1 24.24.24.2
403 Pop tag 5.5.5.0/24 5258 Fa0/0 45.45.45.5
404 Pop tag 23.23.23.0/24 0 Fa0/1 24.24.24.2
R4#
R5#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
500 401 2.2.2.0/24 0 Fa0/0 45.45.45.4
R5#