Configuring RSVP-TE Protocol Parameters

To configure RSVP-TE protocol parameters, use the following command:

configure mpls rsvp-te timers session[{bundle-message-time bundle_message_milliseconds} {hello-keep-multiplier hello_keep_number} {hello-time hello_interval_seconds}{refresh-keep-multiplier refresh_keep_number} {refresh-time refresh_seconds}{summary-refresh-time summary_refresh_milliseconds}] [{vlan} vlan_name | vlan all]

This command configures the RSVP-TE protocol parameters for the specified VLAN (Virtual LAN). The RSVP-TE keyword all indicates that the configuration changes apply to all RSVP-TE enabled VLANs.

The hello-interval time specifies the RSVP hello packet transmission interval. The RSVP hello packet is used by the switch to detect when an RSVP-TE peer is no longer reachable. If an RSVP hello packet is not received from a peer within [hello-interval * keep-multiplier] seconds, the peer is declared down and all RSVP sessions to and from that peer are torn down. The default hello-interval time is zero, indicating that RSVP hellos are not enabled. The hello-interval can be set to any value between zero and 60 seconds.

The refresh-time parameter specifies the interval for sending refresh path messages. RSVP refresh messages provide soft state link-level keep-alive information for previously established paths and enable the switch to detect when an LSP is no longer active. RSVP sessions are torn down if an RSVP refresh message is not received from a neighbor within [(keep-multiplier + 0.5) * 1.5 * refresh-time] seconds. The default refresh-time is 30 seconds and the default keep-multiplier value is three. The minimum and maximum refresh-time values are one and 36,000 seconds (or ten hours), respectively. The minimum and maximum keep-multiplier values are one and 255, respectively.

The bundle-time, specified in tenths of a second, indicates the maximum amount of time a transmit buffer is held so that multiple RSVP messages can be bundled into a single PDU. The default bundle-time is zero, indicating that RSVP message bundling is not enabled. The bundle-time value can be set to any value between zero and 30 (or 3 seconds).

The summary-refresh-time, specified in tenths of a second, indicates the time interval for sending summary refresh RSVP messages. The summary-refresh-time must be less than the configured refresh-time. The default summary-refresh-time is zero, indicating that no summary refresh RSVP messages are sent. The summary-refresh-time value may be set to any value between zero to 100 (or 10 seconds).

If configured, the bundled and summary refresh RSVP messages are only sent to RSVP-TE peers supporting RSVP refresh reduction.

Published March 2020prev | next

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