环境如图:
SH office 2以前使用10.200.4.0网段,现需求扩大IP 地址段.
方法1:更改mask,但这个会影响到目前所有设备的更改及地址规划等问题
方法2: 添加一个新的IP地址段给sh office 2使用
现在我们就来实现方法2
SH office 2与 SH office1 通过 MPLS 连接,R6有环回口6.6.6.6
R1-R4跑的是静态路由 <模拟现状>
R6-R5 跑得是OSPF
R4#sh ip vrf detail
VRF mpls14 (VRF Id = 1); default RD 1:1; default VPNID <not set>
Interfaces:
Fa0/1
VRF Table ID = 1
Export VPN route-target communities
RT:16:16
Import VPN route-target communities
RT:16:16
No import route-map
No export route-map
VRF label distribution protocol: not configured
VRF label allocation mode: per-prefix
R4#sh ip vrf interfaces
Interface IP-Address VRF Protocol
Fa0/1 14.1.1.4 mpls14 up
R4#sh ip route vrf mpls14
Gateway of last resort is 14.1.1.1 to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via 14.1.1.1, FastEthernet0/1
6.0.0.0/32 is subnetted, 1 subnets
B 6.6.6.6 [200/2] via 5.5.5.5, 00:11:54
14.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 14.1.1.0/24 is directly connected, FastEthernet0/1
L 14.1.1.4/32 is directly connected, FastEthernet0/1
56.0.0.0/24 is subnetted, 1 subnets
B 56.1.1.0 [200/0] via 5.5.5.5, 00:11:54
R5#sh ip route vrf mpls56
Gateway of last resort is 4.4.4.4 to network 0.0.0.0
B* 0.0.0.0/0 [200/0] via 4.4.4.4, 00:12:32
6.0.0.0/32 is subnetted, 1 subnets
O 6.6.6.6 [110/2] via 56.1.1.6, 00:12:48, FastEthernet0/0
56.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 56.1.1.0/24 is directly connected, FastEthernet0/0
L 56.1.1.5/32 is directly connected, FastEthernet0/0
R4#sh ip protocols vrf mpls14
*** IP Routing is NSF aware ***
Routing Protocol is "bgp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is disabled
Redistributing: static
Maximum path: 1
Routing Information Sources:
Gateway Distance Last Update
Distance: external 20 internal 200 local 200
R5#sh ip protocols vrf mpls56
*** IP Routing is NSF aware ***
Routing Protocol is "ospf 56"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 56.1.1.5
It is an area border and autonomous system boundary router
Redistributing External Routes from,
bgp 1, includes subnets in redistribution
Number of areas in this router is 1. 1 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
56.1.1.0 0.0.0.255 area 0
Routing Information Sources:
Gateway Distance Last Update
6.6.6.6 110 00:14:15
Distance: (default is 110)
Routing Protocol is "bgp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is disabled
Redistributing: ospf 56
Maximum path: 1
Routing Information Sources:
Gateway Distance Last Update
Distance: external 20 internal 200 local 200
R5#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
500 Pop Label 4.4.4.4/32 0 Se1/1 point2point
501 No Label 6.6.6.6/32[V] 570 Fa0/0 56.1.1.6
502 No Label 56.1.1.0/24[V] 0 aggregate/mpls56
R4#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
400 Pop Label 5.5.5.5/32 0 Se1/1 point2point
401 No Label 0.0.0.0/0[V] 570 Fa0/1 14.1.1.1
R5#sh ip bgp vpnv4 all labels \\察看VPNV4关联的标签
Network Next Hop In label/Out label
Route Distinguisher: 1:1 (mpls56)
0.0.0.0 4.4.4.4 nolabel/401
6.6.6.6/32 56.1.1.6 501/nolabel
56.1.1.0/24 0.0.0.0 502/nolabel(mpls56)
R4#sh ip bgp vpnv4 rd 1:1 //查看MP-BGP RD为1:1的路由信息
BGP table version is 6, local router ID is 4.4.4.4
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:1 (default for vrf mpls14)
*> 0.0.0.0 14.1.1.1 0 32768 ?
*>i6.6.6.6/32 5.5.5.5 2 100 0 ?
*>i56.1.1.0/24 5.5.5.5 0 100 0 ?
R5#sh ip bgp vpnv4 rd 1:1 //查看MP-BGP RD为1:1的路由信息
BGP table version is 5, local router ID is 5.5.5.5
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 1:1 (default for vrf mpls56)
*>i0.0.0.0 4.4.4.4 0 100 0 ?
*> 6.6.6.6/32 56.1.1.6 2 32768 ?
*> 56.1.1.0/24 0.0.0.0 0 32768 ?
R4#sh ip bgp vpnv4 all 6.6.6.6
BGP routing table entry for 1:1:6.6.6.6/32, version 5
Paths: (1 available, best #1, table mpls14)
Not advertised to any peer
Local
5.5.5.5 (metric 2297856) from 5.5.5.5 (5.5.5.5)
Origin incomplete, metric 2, localpref 100, valid, internal, best
Extended Community: RT:16:16 OSPF DOMAIN ID:0x0005:0x000000380200
OSPF RT:0.0.0.0:2:0 OSPF ROUTER ID:56.1.1.5:0 //MP-BGP所携带的扩展社团属性
mpls labels in/out nolabel/501
主要是在R1的F0/0 接口下配置
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
!
interface FastEthernet0/0.1
encapsulation dot1Q 1 native
ip address 10.200.4.254 255.255.255.0
!
interface FastEthernet0/0.2
encapsulation dot1Q 2
ip address 10.200.43.254 255.255.255.0
!
interface FastEthernet0/1
ip address 14.1.1.1 255.255.255.0
duplex auto
speed auto
SW1---R1 之间为trunk链路 SW3-SW2之间为trunk链路
测试结果就是:
PC9-PC8-PC7 可以相互ping通,且都可以ping通6.6.6.6
试验拓扑图可以在我的网盘下载到
本文出自 “Erick WAY” 博客，谢绝转载！
原文地址：http://ericfu.blog.51cto.com/416760/1702496
