R3303-HP HSR6800 Routers MPLS Configuration Guide
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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
may 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 may need to recalculate paths. This tends
to be resource consuming as recalculation involves IGP flooding. To reduce recalculations and flood only
significant changes, you can 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.
To configure flooding thresholds:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter MPLS TE tunnel interface
view.
interface interface-type
interface-number
N/A
3. Configure the up/down
thresholds for IGP to flood
bandwidth changes.
mpls te bandwidth change
thresholds { down | up } percent
Optional.
Both up and down flooding
thresholds are 10 by default.
Specifying the link metric type for tunnel path calculation
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A