H3C Technologies H3C S10500 Series Switches - Manual (Page 123)

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NOTE:
The interface-type argument in the ip route-static command must be tunnel. In addition, the preference
value must be set.
For more information about static routing, see
Layer 3—IP Routing Configuration Guide.
Forwarding traffic along MPLS TE tunnels through automatic route advertisement
NOTE:
Automatic route advertisement is available depending on your device.
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 can 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.
Enable OSPF or IS-IS on the tunnel interface of the MPLS TE tunnel before configuring automatic route
advertisement.
1. Configure IGP shortcut
Follow these steps to configure IGP shortcut:
To do… Use the command... Remarks
Enter system view system-view ––
Enter MPLS TE tunnel interface view interface tunnel tunnel-number ––
Configure the IGP to take the MPLS
TE tunnels in up state into account
when performing enhanced SPF
calculation
mpls te igp shortcut [ isis |
ospf ]
Required
MPLS TE tunnels are not considered in
the enhanced SPF calculation of IGP.
If no IGP type is specified, the
configuration applies to both OSPF
and ISIS by default.
Assign a metric to the MPLS TE
tunnel mpls te igp metric { absolute |
relative } value
Optional
The metrics of TE tunnels equal the
metrics of their corresponding IGP
routes by default.
Submit current tunnel configuration mpls te commit Required
Exit to system view quit ––
Enter OSPF view ospf [ process-id ] ––