HP 12500 Series Configuration Manual page 76

NOTE:
interface-type
The
•
value must be set.
For more information about static routing, see
•
Forwarding traffic along MPLS TE tunnels through automatic route advertisement
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.
Enable OSPF or IS-IS on the tunnel interface of the MPLS TE tunnel before configuring automatic route
advertisement.
Configure IGP shortcut
1.
To configure IGP shortcut:
To do...
Enter system view
Enter MPLS TE tunnel interface view
Configure the IGP to take the MPLS
TE tunnels in up state into account
when performing enhanced SPF
calculation
Assign a metric to the MPLS TE
tunnel
Submit current tunnel configuration
Exit to system view
Enter OSPF view
Enable the IGP shortcut function
Configure forwarding adjacency
2.
argument in the ip route-static command must be tunnel. In addition, the preference
Use the command...
system-view
interface tunnel tunnel-number
mpls te igp shortcut [ isis | ospf ]
mpls te igp metric { absolute |
relative } value
mpls te commit
quit
ospf [ process-id ]
enable traffic-adjustment
Layer 3—IP Routing Configuration Guide
68
.
Remarks
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––
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.
Optional
The metrics of TE tunnels equal the
metrics of their corresponding IGP
routes by default.
Required
––
––
Required
Disabled by default