No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

S12700 V200R011C10 Configuration Guide - VPN

This document describes the VPN configuration procedures and provides configuration examples.
Rate and give feedback :
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring MPLS GR on the Backbone Network

Configuring MPLS GR on the Backbone Network

Context

You can configure LDP GR to maintain proper MPLS forwarding during the active/standby switchover and system update. If LDP LSPs are used, configure MPLS LDP GR. If RSVP TE tunnels are used, configure MPLS RSVP GR. Other types of tunnels do not require this configuration.

Procedure

  • Configure MPLS LDP GR.
    1. Run system-view

      The system view is displayed.

    2. Run mpls

      MPLS is enabled globally, and the MPLS view is displayed.

    3. Run quit

      Return to the system view.

    4. Run mpls ldp

      The MPLS LDP view is displayed.

    5. Run graceful-restart

      The GR capability of MPLS LDP is enabled.

    6. (Optional) Run graceful-restart timer reconnect time

      The reconnection period of the MPLS LDP session is configured.

      By default, the reconnection period is 300 seconds.

      After a GR Restarter performs an active/standby switchover, a GR helper detects that an LDP session established between the GR Helper and Restarter fails and then starts a Reconnect timer and waits for the reestablishment of the LDP session.
      • If the Reconnect timer expires before the LDP session between the GR Helper and Restarter is established, the GR Helper immediately deletes MPLS forwarding entries associated with the GR Restarter and exits from the GR Helper process.

      • If the LDP session between the GR Helper and Restarter is established before the Reconnect timer expires, the GR Helper deletes the timer and starts a Recovery timer.

      When the GR Restarter and Helper negotiate the time to reestablish the LDP session, the value of the Reconnect timer that takes effect on the local end is the smaller value between the Neighbor-liveness timer value on the GR Helper and the Reconnect timer value on the GR Restarter.

    7. (Optional) Run graceful-restart timer neighbor-liveness time

      The validity period of MPLS LDP neighbors is configured.

      By default, the validity period of MPLS LDP neighbors is 600 seconds.

      LDP GR-enabled devices negotiate the LDP reconnection time and use the smaller value between the Neighbor-liveness time configured on a Helper and the Reconnect time configured on the Restarter. On a network with a few LSPs, the graceful-restart timer neighbor-liveness command can be run to set a small value for the Neighbor-liveness timer to shorten the GR period.

    8. (Optional) Run graceful-restart timer recovery time

      The MPLS LDP recovery period is configured.

      By default, the MPLS LDP recovery period is 300 seconds.

      A GR Helper starts a Recovery timer after an LDP session is reestablished and waits for LSP recovery.
      • If the Recovery timer expires before LSPs are reestablished, the GR Helper considers that the GR process is completed on the GR Restarter and deletes the unrecovered LSP.

      • If all LSPs recover before the Recovery timer expires, the GR Helper considers that the GR process is completed on the GR Restarter only after the Recovery timer expires.

      On a network with a large number of routes is faulty, run the graceful-restart timer recovery command to increase the value of the Recovery timer to ensure that all LSPs recover before the timer expires.

      LDP GR devices negotiate the LSP Recovery timer values. The value that takes effect on the local end is the smaller one between the locally configured value and the value sent by the peer.

    NOTE:

    When the GR capability of MPLS LDP is enabled or the GR parameters are modified, the LDP session is reestablished.

  • Configure RSVP GR.
    1. Run system-view

      The system view is displayed.

    2. Run mpls

      The MPLS view is displayed.

    3. Run mpls te

      MPLS TE is enabled.

    4. Run mpls rsvp-te

      RSVP TE is enabled.

    5. Run mpls rsvp-te hello

      The RSVP Hello extension of the local node is enabled.

    6. Run mpls rsvp-te hello full-gr

      The GR capability of RSVP TE is enabled. In addition, the GR capability of the peer is also supported.

      By default, the GR capability of RSVP TE is disabled.

      After a GR Restarter performs an active/standby switchover, a GR helper detects that an LDP session established between the GR Helper and Restarter fails and then starts a Reconnect timer and waits for the reestablishment of the LDP session.
      • If the Reconnect timer expires before the LDP session between the GR Helper and Restarter is established, the GR Helper immediately deletes MPLS forwarding entries associated with the GR Restarter and exits from the GR Helper process.

      • If the LDP session between the GR Helper and Restarter is established before the Reconnect timer expires, the GR Helper deletes the timer and starts a Recovery timer.

      When the GR Restarter and Helper negotiate the time to reestablish the LDP session, the value of the Reconnect timer that takes effect on the local end is the smaller value between the Neighbor-liveness timer value on the GR Helper and the Reconnect timer value on the GR Restarter.

    7. (Optional) Run mpls rsvp-te hello nodeid-session ip-address

      The Hello session is established between nodes of RSVP TE enabled with GR capability.

      On a TE FRR network, to ensure the protection of the primary tunnel when FRR and RSVP-TE GR simultaneously occur, run the mpls rsvp-te hello nodeid-session command to establish a Hello session between a PLR node and an MP.

    8. Run quit

      Return to the system view.

    9. Run interface interface-type interface-number

      The RSVP-TE interface view is displayed.

    10. Run mpls

      The MPLS view is displayed.

    11. Run mpls te

      MPLS TE is enabled.

    12. Run mpls rsvp-te

      RSVP TE is enabled.

    13. Run mpls rsvp-te hello

      The RSVP Hello extension function is enabled on the interface.

      Although the RSVP Hello extension function is enabled globally, it is disabled on the RSVP-enabled interfaces by default.

Translation
Download
Updated: 2019-04-01

Document ID: EDOC1000178118

Views: 158145

Downloads: 159

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next