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Option: Configuring Automatic Site Selection


You can configure BGP-signaled VPLS instances to automatically specify the site IDs for the routers participating in the VPLS domain. Site IDs help to minimize label usage in VPLS instances with numerous PE routers.

The automatic-site-id statement includes the following options:

  • startup-wait-time—Time to wait at startup to receive all VPLS information for configured route targets from other PE routers.

  • new-site-wait-time—Time to wait to receive VPLS information from a newly configured routing instance or a new site. Effectively, it is the time to wait before a site makes an attempt to locate an unused site ID for its claim advertisement.

  • collision-detect-time—Time to wait after issuing a claim advertisement before the PE router can start using the site ID if it does not receive a competing claim. If the PE router receives a competing claim within this time interval, it runs a collision resolution procedure. Explicitly configured site IDs always take precedence over automatically generated site IDs.

  • reclaim-wait-time—Time to wait before attempting to claim a site ID after a collision. There are default values for all of these options, so they do not need to be explicitly configured.

To configure a VPLS automatic site ID, include the automatic-site-id statement at the [edit routing-instances routing-instance-name protocols vpls site site-name] hierarchy level: