配置本地MT特性示例

组网需求

如图1所示，网络中同时部署了组播和MPLS TE-Tunnel，且TE-Tunnel配置了IGP Shortcut，IGP计算出来的路由的出接口可能不再是实际的物理接口，而是TE-Tunnel接口。交换机根据到达组播源地址的单播路由，从TE-Tunnel接口发送组播加入报文，这样，被TE-Tunnel跨越的交换机就无法感知到组播加入报文，因而不会建立组播转发表项。为了解决上述问题，在SwitchB上配置OSPF本地MT功能。如果计算出来的路由出接口为IGP-Shortcut类型的TE-Tunnel，路由管理模块会为组播协议创建单独的MIGP路由表，并为该路由计算出实际的物理出接口，将其加入到MIGP路由表中，组播利用MIGP路由表中的路由进行转发。

图1配置OSPF本地MT特性组网图

配置思路

采用如下的思路配置本地MT特性：

在各交换机上配置OSPF基本功能，实现OSPF网络的基本互通。在各交换机上配置组播PIM-SM，使Host能够接收到Source发送的组播数据。在SwitchB、SwitchC和SwitchD上配置MPLS RSVP-TE隧道功能，并在SwitchB上配置MPLS TE隧道接口，建立一条从SwitchB到SwitchD的TE隧道。在SwitchB上配置IGP-Shortcut功能，实现SwitchB使用TE隧道接口作为出接口。在SwitchB上配置OSPF本地MT功能，实现原来出接口为TE-Tunnel的路由，其下一跳在MIGP路由表中均被计算为物理出接口。

操作步骤

配置各接口所属VLAN# 配置SwitchA。SwitchB、SwitchC、SwitchD和SwitchE的配置与SwitchA类似。

<HUAWEI> system-view[HUAWEI] sysname SwitchA[SwitchA] vlan batch 10 20[SwitchA] interface gigabitethernet 1/0/1[SwitchA-GigabitEthernet1/0/1] port link-type access[SwitchA-GigabitEthernet1/0/1] port default vlan 10[SwitchA-GigabitEthernet1/0/1] quit[SwitchA] interface gigabitethernet 1/0/2[SwitchA-GigabitEthernet1/0/2] port link-type trunk[SwitchA-GigabitEthernet1/0/2] port trunk allow-pass vlan 20[SwitchA-GigabitEthernet1/0/2] quit

配置各VLANIF和LoopBack接口的IP地址# 配置SwitchA。SwitchB、SwitchC、SwitchD和SwitchE的配置与SwitchA类似。

[SwitchA] interface loopback 0[SwitchA-LoopBack0] ip address 10.1.1.1 32[SwitchA-LoopBack0] quit[SwitchA] interface vlanif 10[SwitchA-Vlanif10] ip address 172.16.1.1 24[SwitchA-Vlanif10] quit[SwitchA] interface vlanif 20[SwitchA-Vlanif20] ip address 10.0.0.1 24[SwitchA-Vlanif20] quit

配置OSPF基本功能# 配置SwitchA。

[SwitchA] router id 10.1.1.1[SwitchA] ospf 1[SwitchA-ospf-1] area 0[SwitchA-ospf-1-area-0.0.0.0] network 10.1.1.1 0.0.0.0[SwitchA-ospf-1-area-0.0.0.0] network 10.0.0.0 0.0.0.255[SwitchA-ospf-1-area-0.0.0.0] network 172.16.1.0 0.0.0.255[SwitchA-ospf-1-area-0.0.0.0] quit[SwitchA-ospf-1] quit

# 配置SwitchB。

[SwitchB] router id 10.2.2.2[SwitchB] ospf 1[SwitchB-ospf-1] area 0[SwitchB-ospf-1-area-0.0.0.0] network 10.2.2.2 0.0.0.0[SwitchB-ospf-1-area-0.0.0.0] network 10.0.0.0 0.0.0.255[SwitchB-ospf-1-area-0.0.0.0] network 10.0.1.0 0.0.0.255[SwitchB-ospf-1-area-0.0.0.0] quit[SwitchB-ospf-1] quit

# 配置SwitchC。

[SwitchC] router id 10.3.3.3[SwitchC] ospf 1[SwitchC-ospf-1] area 0[SwitchC-ospf-1-area-0.0.0.0] network 10.3.3.3 0.0.0.0[SwitchC-ospf-1-area-0.0.0.0] network 10.0.1.0 0.0.0.255[SwitchC-ospf-1-area-0.0.0.0] network 10.0.2.0 0.0.0.255[SwitchC-ospf-1-area-0.0.0.0] quit[SwitchC-ospf-1] quit

# 配置SwitchD。

[SwitchD] router id 10.4.4.4[SwitchD] ospf 1[SwitchD-ospf-1] area 0[SwitchD-ospf-1-area-0.0.0.0] network 10.4.4.4 0.0.0.0[SwitchD-ospf-1-area-0.0.0.0] network 10.0.2.0 0.0.0.255[SwitchD-ospf-1-area-0.0.0.0] network 10.0.3.0 0.0.0.255[SwitchD-ospf-1-area-0.0.0.0] quit[SwitchD-ospf-1] quit

# 配置SwitchE。

[SwitchE] router id 10.5.5.5[SwitchE] ospf 1[SwitchE-ospf-1] area 0[SwitchE-ospf-1-area-0.0.0.0] network 10.5.5.5 0.0.0.0[SwitchE-ospf-1-area-0.0.0.0] network 10.0.3.0 0.0.0.255[SwitchE-ospf-1-area-0.0.0.0] network 192.168.3.0 0.0.0.255[SwitchE-ospf-1-area-0.0.0.0] quit[SwitchE-ospf-1] quit

配置PIM-SM# 在所有交换机上使能组播功能，在各接口上使能PIM-SM功能。SwitchB、SwitchC、SwitchD和SwitchE的配置与SwitchA相似，配置过程略。

[SwitchA] multicast routing-enable[SwitchA] interface vlanif 10[SwitchA-Vlanif10] pim sm[SwitchA-Vlanif10] quit[SwitchA] interface vlanif 20[SwitchA-Vlanif20] pim sm[SwitchA-Vlanif20] quit

# 在SwitchA连接用户主机的接口上使能IGMP功能。

[SwitchA] interface vlanif 10[SwitchA-Vlanif10] igmp enable[SwitchA-Vlanif10] igmp version 3[SwitchA-Vlanif10] quit

# 配置C-BSR和C-RP。在SwitchD上配置RP通告的服务范围，及C-BSR和C-RP的位置。

[SwitchD] pim[SwitchD-pim] c-bsr vlanif 50[SwitchD-pim] c-rp vlanif 50[SwitchD-pim] quit

# 通过使用display multicast routing-table命令可以查看交换机组播路由表。以SwitchC为例。

[SwitchC] display multicast routing-tableMulticast routing table of VPN-Instance: public net Total 1 entry 00001. (192.168.3.2, 225.0.0.1) Uptime: 15:03:04 Upstream Interface: Vlanif40 List of 1 downstream interface 1: Vlanif30

配置MPLS RSVP-TE隧道# 配置SwitchB。

[SwitchB] mpls lsr-id 10.2.2.2[SwitchB] mpls[SwitchB-mpls] mpls te[SwitchB-mpls] mpls rsvp-te[SwitchB-mpls] mpls te cspf[SwitchB-mpls] quit[SwitchB] interface vlanif 30[SwitchB-Vlanif30] mpls[SwitchB-Vlanif30] mpls te[SwitchB-Vlanif30] mpls rsvp-te[SwitchB-Vlanif30] quit[SwitchB] ospf 1[SwitchB-ospf-1] enable traffic-adjustment[SwitchB-ospf-1] opaque-capability enable[SwitchB-ospf-1] area 0.0.0.0[SwitchB-ospf-1-area-0.0.0.0] mpls-te enable[SwitchB-ospf-1-area-0.0.0.0] quit[SwitchB-ospf-1] quit

# 配置SwitchC。

[SwitchC] mpls lsr-id 10.3.3.3[SwitchC] mpls[SwitchC-mpls] mpls te[SwitchC-mpls] mpls rsvp-te[SwitchC-mpls] quit[SwitchC] interface vlanif 30[SwitchC-Vlanif30] mpls[SwitchC-Vlanif30] mpls te[SwitchC-Vlanif30] mpls rsvp-te[SwitchC-Vlanif30] quit[SwitchC] interface vlanif 40[SwitchC-Vlanif40] mpls[SwitchC-Vlanif40] mpls te[SwitchC-Vlanif40] mpls rsvp-te[SwitchC-Vlanif40] quit[SwitchC] ospf 1[SwitchC-ospf-1] opaque-capability enable[SwitchC-ospf-1] area 0.0.0.0[SwitchC-ospf-1-area-0.0.0.0] mpls-te enable[SwitchC-ospf-1-area-0.0.0.0] quit[SwitchC-ospf-1] quit

# 配置SwitchD。

[SwitchD] mpls lsr-id 10.4.4.4[SwitchD] mpls[SwitchD-mpls] mpls te[SwitchD-mpls] mpls rsvp-te[SwitchD-mpls] quit[SwitchD] interface vlanif 40[SwitchD-Vlanif40] mpls[SwitchD-Vlanif40] mpls te[SwitchD-Vlanif40] mpls rsvp-te[SwitchD-Vlanif40] quit[SwitchD] ospf 1[SwitchD-ospf-1] opaque-capability enable[SwitchD-ospf-1] area 0.0.0.0[SwitchD-ospf-1-area-0.0.0.0] mpls-te enable[SwitchD-ospf-1-area-0.0.0.0] quit[SwitchD-ospf-1] quit

# 配置MPLS TE隧道，并使能IGP Shortcut。在SwitchB上配置MPLS TE隧道，使能IGP Shortcut。

[SwitchB] interface tunnel 1[SwitchB-Tunnel1] ip address unnumbered interface loopback 0[SwitchB-Tunnel1] tunnel-protocol mpls te[SwitchB-Tunnel1] destination 10.4.4.4[SwitchB-Tunnel1] mpls te tunnel-id 100[SwitchB-Tunnel1] mpls te igp shortcut ospf[SwitchB-Tunnel1] mpls te igp metric relative -10[SwitchB-Tunnel1] mpls te commit[SwitchB-Tunnel1] quit

# 查看SwitchB的OSPF路由表，可以看到，MPLS TE隧道已经被建立。

[SwitchB] display ip routing-tableRoute Flags: R - relay, D - download to fib ------------------------------------------------------------------------------Routing Tables: Public Destinations : 15 Routes : 15Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.0.0/24 Direct 0 0 D 10.0.0.2 Vlanif20 10.0.0.2/32 Direct 0 0 D 127.0.0.1 Vlanif20 10.0.1.0/24 Direct 0 0 D 10.0.1.2 Vlanif30 10.0.1.2/32 Direct 0 0 D 127.0.0.1 Vlanif30 10.0.2.0/24 OSPF 10 2 D 10.0.1.1 Vlanif30 10.0.3.0/24 OSPF 10 2 D 10.2.2.2 Tunnel1 10.1.1.1/32 OSPF 10 1 D 10.0.0.1 Vlanif2010.2.2.2/32 Direct 0 0 D 127.0.0.1 LoopBack0 10.3.3.3/32 OSPF 10 1 D 10.0.1.1 Vlanif30 10.4.4.4/32 OSPF 10 1 D 10.2.2.2 Tunnel1 10.5.5.5/32 OSPF 10 2 D 10.2.2.2 Tunnel1 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 172.16.1.0/24 OSPF 10 2 D 10.0.0.1 Vlanif20 192.168.3.0/24 OSPF 10 3 D 10.2.2.2 Tunnel1

# 在被TE-Tunnel穿越的交换机SwitchC上查看组播路由表。

[SwitchC] display multicast routing-table

没有显示任何组播表项，说明组播报文被丢弃。配置本地MT特性# 在SwitchB上使能本地MT特性。

[SwitchB] ospf 1[SwitchB-ospf-1] local-mt enable[SwitchB-ospf-1] quit

验证配置结果# 此时再次查看SwitchC的组播路由表，已经有组播路由。

[SwitchC] display multicast routing-tableMulticast routing table of VPN-Instance: public net Total 1 entry 00001. (192.168.3.2, 225.0.0.1) Uptime: 00:00:19 Upstream Interface: Vlanif40 List of 1 downstream interface 1: Vlanif30

# 在SwitchB上查看MIGP路由表。

[SwitchB] display migp routing-tableRoute Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: MIGP Destinations : 4 Routes : 4Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.3.0/24 OSPF 10 3 10.0.1.1 Vlanif30 10.4.4.4/32 OSPF 10 2 10.0.1.1 Vlanif30 10.5.5.5/32 OSPF 10 3 10.0.1.1 Vlanif30 192.168.3.0/24 OSPF 10 4 10.0.1.1 Vlanif30

原来出接口为TE-Tunnel的路由，其下一跳在MIGP路由表中均被计算为物理出接口。

配置文件

#sysname SwitchA#router id 10.1.1.1#vlan batch 10 20#multicast routing-enable#interface Vlanif10 ip address 172.16.1.1 255.255.255.0pim sm igmp enable igmp version 3#interface Vlanif20 ip address 10.0.0.1 255.255.255.0 pim sm#interface GigabitEthernet1/0/1 port link-type access port default vlan 10 #interface GigabitEthernet1/0/2 port link-type trunk port trunk allow-pass vlan 20 #interface LoopBack0 ip address 10.1.1.1 255.255.255.255#ospf 1 area 0.0.0.0 network 10.1.1.1 0.0.0.0 network 10.0.0.0 0.0.0.255 network 172.16.1.0 0.0.0.255#return

#sysname SwitchB#router id 10.2.2.2#vlan batch 20 30#multicast routing-enable#mpls lsr-id 10.2.2.2mpls mpls te mpls rsvp-te mpls te cspf#interface Vlanif20 ip address 10.0.0.2 255.255.255.0 pim sm#interface Vlanif30 ip address 10.0.1.2 255.255.255.0 pim sm mpls mpls te mpls rsvp-te#interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 20#interface GigabitEthernet1/0/2 port link-type trunk port trunk allow-pass vlan 30#interface LoopBack0 ip address 10.2.2.2 255.255.255.255#interface Tunnel1 ip address unnumbered interface LoopBack0 tunnel-protocol mpls te destination 10.4.4.4 mpls te tunnel-id 100 mpls te igp shortcut ospf mpls te igp metric relative -10 mpls te commit#ospf 1 opaque-capability enable enable traffic-adjustment local-mt enable area 0.0.0.0 network 10.2.2.2 0.0.0.0 network 10.0.0.0 0.0.0.255 network 10.0.1.0 0.0.0.255 mpls-te enable#return

#sysname SwitchC#router id 10.3.3.3#vlan batch 30 40#multicast routing-enable#mpls lsr-id 10.3.3.3mpls mpls te mpls rsvp-te#interface Vlanif30 ip address 10.0.1.1 255.255.255.0 pim sm mpls mpls te mpls rsvp-te#interface Vlanif40 ip address 10.0.2.2 255.255.255.0 pim sm mpls mpls te mpls rsvp-te#interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 30#interface GigabitEthernet1/0/2 port link-type trunk port trunk allow-pass vlan 40#interface LoopBack0 ip address 10.3.3.3 255.255.255.255#ospf 1 opaque-capability enable area 0.0.0.0 network 10.3.3.3 0.0.0.0 network 10.0.1.0 0.0.0.255 network 10.0.2.0 0.0.0.255 mpls-te enable#return

#sysname SwitchD#router id 10.4.4.4#vlan batch 40 50#multicast routing-enable#mpls lsr-id 10.4.4.4mpls mpls te mpls rsvp-te#interface Vlanif40 ip address 10.0.2.1 255.255.255.0 pim sm mpls mpls te mpls rsvp-te#interface Vlanif50 ip address 10.0.3.1 255.255.255.0 pim sm#interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 50#interface GigabitEthernet1/0/2 port link-type trunk port trunk allow-pass vlan 40#interface LoopBack0 ip address 10.4.4.4 255.255.255.255#ospf 1 opaque-capability enable area 0.0.0.0 network 10.4.4.4 0.0.0.0 network 10.0.2.0 0.0.0.255 network 10.0.3.0 0.0.0.255 mpls-te enable#pim c-bsr Vlanif50 c-rp Vlanif50#return

#sysname SwitchE#router id 10.5.5.5#vlan batch 50 60#multicast routing-enable#interface Vlanif50 ip address 10.0.3.3 255.255.255.0 pim sm#interface Vlanif60 ip address 192.168.3.1 255.255.255.0 pim sm#interface GigabitEthernet1/0/1 port link-type trunk port trunk allow-pass vlan 50#interface GigabitEthernet1/0/2 port link-type access port default vlan 60#interface LoopBack0 ip address 10.5.5.5 255.255.255.255#ospf 1 area 0.0.0.0 network 10.5.5.5 0.0.0.0 network 10.0.3.0 0.0.0.255 network 192.168.3.0 0.0.0.255#return