How To Implement Rsvp; Configuring Traffic Engineering Tunnel Bandwidth; Confirming Diffserv-Te Bandwidth; How To Implement Rsvp Authentication - Cisco ASR 9000 Series Configuration Manual

How to Implement RSVP

• QoS policies can cause a reorder of packets in a steady state.
Because all out-of-sequence messages are dropped, the sender must retransmit them. Because RSVP state
timeouts are generally long, out-of-sequence messages during a transient state do not lead to a state timeout.

How to Implement RSVP

RSVP requires coordination among several routers, establishing exchange of RSVP messages to set up LSPs.
Depending on the client application, RSVP requires some basic configuration, as described in these topics:

Configuring Traffic Engineering Tunnel Bandwidth

To configure traffic engineering tunnel bandwidth, you must first set up TE tunnels and configure the reserved
bandwidth per interface (there is no need to configure bandwidth for the data channel or the control channel).
Cisco IOS XR software supports two MPLS DS-TE modes: Prestandard and IETF.
For prestandard DS-TE you do not need to configure bandwidth for the data channel or the control channel.
Note
There is no other specific RSVP configuration required for this application. When no RSVP bandwidth
is specified for a particular interface, you can specify zero bandwidth in the LSP setup if it is configured
under RSVP interface configuration mode or MPLS-TE configuration mode.
Related Topics
Configuring a Prestandard DS-TE Tunnel, on page 173
Configuring an IETF DS-TE Tunnel Using RDM, on page 175
Configuring an IETF DS-TE Tunnel Using MAM, on page 178

Confirming DiffServ-TE Bandwidth

Perform this task to confirm DiffServ-TE bandwidth.
In RSVP global and subpools, reservable bandwidths are configured per interface to accommodate TE tunnels
on the node. Available bandwidth from all configured bandwidth pools is advertised using IGP. RSVP signals
the TE tunnel with appropriate bandwidth pool requirements.
SUMMARY STEPS
1. configure
2. rsvp
3. interface type interface-path-id
4. bandwidth total-bandwidth max-flow sub-pool sub-pool-bw
5. Use the commit or end command.
Cisco ASR 9000 Series Aggregation Services Router MPLS Configuration Guide, Release 4.3.x
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Implementing RSVP for MPLS-TE
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