H3C Technologies H3C Intelligent Management Center - Manual (Page 173)

Figure 42 Configure Interface RSVP TE Attributes page
4. Configure the following parameters:
• Retransmission Increment Value and Retransmission Period (ms).
You may configure RSVP message retransmission. After the interface sends an RSVP message,
it waits for acknowledgment. If no acknowledgment is received before the initial
retransmission interval expires, the interface resends the message. After that, the interface
resends the message at an exponentially increased retransmission interval. The valid range of
retransmission increment value is from 1 to 10. If the value is null, then shut down the
retransmission function on the device. The valid range of retransmission period is from 500 to
3000. If the value is null, then shut down the retransmission function on the device.
• Summary Refresh
Send summary refreshes rather than retransmit standard Path or Resv messages to refresh
related RSVP state. This reduces refresh traffic and allows nodes to make faster processing.
You can select Enabled from the Summary Refresh list to enable the summary refresh.
• RSVP Hello Extension
The RSVP Hello Extension attribute detects the reachability of RSVP neighboring nodes. You
can select Enabled from the RSVP Hello Extension list to enable the reachability detection.
5. Click OK.
Configuring an MPLS TE tunnel using static CR-LSP
Unlike ordinary LSPs established based on routing information, CR-LSPs are established based on criteria
such as bandwidth, selected path, and QoS parameters in addition to routing information. The
mechanism setting up and managing constraints is called Constraint-based Routing (CR). If you want to
create an MPLS TE tunnel along a fixed route with fixed nodes, you can create it using static CR-LSP.
Creating MPLS TE tunnels using static CR-LSPs does not involve configuration of tunnel constraints or the
issue of IGP TE extension or CSPF.
Despite its ease of configuration, the application of MPLS TE tunnels using static CR-LSPs is restricted
because they cannot dynamically adapt to network changes.
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