R2511-HP MSR Router Series MPLS Configuration Guide(V5)
350
Ste
p
Command
Remarks
3. Enable IGP to advertise the
route of the MPLS TE tunnel to
IGP neighbors..
mpls te igp advertise [ hold-time
value ]
Routes of MPLS TE tunnels are not
advertised to IGP neighbors by
default.
4. 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.
5. Submit current tunnel
configuration.
mpls te commit N/A
6. Return to system view.
quit
N/A
7. Enter OSPF view.
ospf [ process-id ] N/A
8. Enable forwarding
adjacency.
enable traffic-adjustment advertise
Disabled by default.
Configuring traffic forwarding tuning parameters
In MPLS TE, you can configure traffic forwarding tuning parameters, such as the failed link timer and
flooding thresholds, to change paths that IP or MPLS traffic flows traverse or to define type of traffic that
might travel down a TE tunnel.
The configurations described in this section are used in conjunction with CSPF and a dynamic signaling
protocol, such as RSVP-TE.
Configuring the failed link timer
A CSPF failed link timer starts once a link goes down. If IGP removes or modifies the link before the timer
expires, CSPF updates information about the link in TEDB and stops the timer. If IGP does not remove or
modify the link before the timer expires, the state of the link in TEDB changes to up.
To configure failed link timer:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter MPLS view.
mpls N/A
3. Configure the CSPF failed link
timer.
mpls te cspf timer failed-link
timer-interval
Optional.
The default is 10 seconds.
Configuring flooding thresholds
After bandwidths of links regulated by MPLS TE change, CSPF might need to recalculate paths. This tends
to be resource consuming as recalculation involves IGP flooding. To reduce recalculations and flood only
significant changes, you might configure the following two IGP flooding thresholds in percentages:
• Up threshold—When the percentage of available-bandwidth increase to the maximum reservable
bandwidth exceeds the threshold, the change is flooded.
• Down threshold—When the percentage of available-bandwidth decrease to the maximum
reservable bandwidth exceeds the threshold, the change is flooded.