MSR系列路由器
MPLS TE 快速重路由功能的配置
关键字：MSR;MPLS;TE;Fast-Reroute;快速重路由;RSVP-TE
一、组网需求：
RTA、RTB、RTC、RTD、RTE通过ISIS发布路由，RTA通过RSVP-TE + 显式路径建立一条到RTD的TE隧道，RTB为保护节点，通过显式路径建立一条经过RTE到RTC的链路，保护RTB与RTC的直连链路
设备清单：MSR系列路由器5台
二、组网图：
三、配置步骤：
设备和版本：MSR系列、Version 5.20, Release
1509
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RTA配置 |
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# router id # mpls lsr-id # # mpls mpls te //使能RSVP-TE，快速重路由只能使用RSVP-TE，不能使用CRLDP mpls rsvp-te mpls te cspf # //定义严格显式路径建立TE隧道主路径 explicit-path pri next ho next ho next ho next ho # is-level level-2 cost-style
wide network-entity
01.0000.1111.1111.1111.00 is-name RTA traffic-eng level-2 # interface Ethernet0/0 port link-mode route description connects to
RTB ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls rsvp-te # interface
LoopBack0 ip address # interface
Tunnel0 ip address tunnel-protocol mpls
te destination mpls te record-route
label mpls te
bandwidth bc0 10 //根据显式路径建立隧道 mpls te
path explicit-path pri //使隧道使能快速重路由感知 mpls te
fast-reroute mpls te igp shortcut mpls te igp metric absolute 20 mpls te
commit # |
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RTB配置 |
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# router id # mpls lsr-id # mpls mpls te mpls
rsvp-te mpls te cspf # //用于保护主链路的旁路显式路径 explicit-path bypass next ho next ho next ho # is-level level-2 cost-style wide network-entity
01.0000.2222.2222.2222.00 is-name RTB traffic-eng level-2 # interface Ethernet5/0 port link-mode route description connects to
RTE ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # interface
LoopBack0 ip address # interface Ethernet0/0 port link-mode route description connects to
RTA ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # interface Ethernet0/1 port link-mode route description connects to
RTC ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 //绑定重路由的旁路 mpls te
fast-reroute bypass-tunnel Tunnel0 mpls
rsvp-te # //定义旁路TE隧道 interface Tunnel0 ip address tunnel-protocol mpls te destination
mpls te record-route label //根据显式路径建立，必配 mpls te path explicit-path bypass //指定备份带宽，必配 mpls te backup bandwidth 10 mpls te commit # |
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RTC配置 |
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# router id # mpls lsr-id # mpls mpls te mpls
rsvp-te mpls te cspf # is-level level-2 cost-style
wide network-entity 01.0000.3333.3333.3333.00 is-name RTC traffic-eng level-2 # interface Ethernet5/0 port link-mode route description connects to
RTE ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # interface
LoopBack0 ip address # interface Ethernet0/0 port link-mode route description connects to
RTD ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # interface Ethernet0/1 port link-mode route description connects to
RTB ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # |
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RTD配置 |
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# router id # mpls lsr-id # mpls mpls te mpls
rsvp-te mpls te cspf # is-level level-2 cost-style
wide network-entity
01.0000.4444.4444.4444.00 is-name RTD traffic-eng level-2 # interface Ethernet0/0 port link-mode route description connects to
RTC ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # |
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RTE配置 |
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# router id # mpls lsr-id # mpls mpls te mpls
rsvp-te mpls te cspf # is-level level-2 bandwidth-reference 10000 cost-style wide network-entity 01.0000.5555.5555.5555.00 is-name RTE traffic-eng level-2 # interface Ethernet0/0 port link-mode route description connnects to RTB ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # interface Ethernet0/1 port link-mode route description connects to
RTC ip address mpls mpls te mpls te
max-link-bandwidth 100 mpls te
max-reservable-bandwidth 50 mpls
rsvp-te # interface
LoopBack0 ip address # |
四、配置关键点：
1) 快速重路由只能使用RSVP-TE作为信令协议；
2) 需要在RTA和RTB上建立显式路径，并且根据显式路径建立隧道；
3) RTA的Tunnel口上需要配置快速重路由感知；
4) RTB的Tunnel口必须要配置备份带宽；
5) RTB 将旁路Tunnel绑定在主隧道的出接口上。