3com S7906E Installationsanweisungen

 

1-30 

Configuring traffic forwarding involves these tasks: 

z

 

z

 

Follow these steps to create static routes for routing traffic along an MPLS TE tunnel: 

Enter system view 

–– 

Create a static route for 
forwarding traffic along an 
MPLS TE tunnel 

ip route-static dest-address

 

{ mask | mask-length } 
interface-type interface-number

 

[ gateway-address ] | 
vpn-instance 
d-vpn-instance-name

 

 } 

[ preference preference-value ] 
[ tag tag-value ] [ description 
description-text

 ] 

Required 

 

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The  interface-type argument in the ip  route-static command must be tunnel. In addition, the 
preference value must be set.  

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For more information about static routing, refer to Static Routing Commands in the IP Routing 

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Two approaches, IGP shortcut and forwarding adjacency, are available to automatic route 
advertisement to advertise MPLS TE tunnel interface routes to IGPs, allowing traffic to be routed down 
MPLS TE tunnels.  

In either approach, TE tunnels are considered point-to-point links and TE tunnel interfaces can be set 
as outgoing interfaces.  

IGP shortcut and forwarding adjacency are different in that in the forwarding adjacency approach, 
routes with TE tunnel interfaces as outgoing interfaces are advertised to neighboring devices but not in 
the IGP shortcut approach. Therefore, TE tunnels are visible to other devices in the forwarding 
adjacency approach but not in the IGP shortcut approach.  

You may assign a metric, either absolute or relative, to TE tunnels for the purpose of path calculation in 
either approach. If it is absolute, the metric is directly used for path calculation. If it is relative, the cost of 
the corresponding IGP path must be added to the metric before it can be used for path calculation.  

Note that you need to enable OSPF or IS-IS on the tunnel interface of the MPLS TE tunnel before 
configuring automatic route advertisement. 

1)  Configure IGP shortcut