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Configuring Fast Convergence from Contrail Command

This topic describes how to configure fast convergence.

To configure fast convergence:

  1. Navigate to the Infrastructure > Cluster > and click Advanced Options.
  2. From the Global Config tab, click Edit System Configuration.
    Figure 1: Configure Fast Convergence Parameters Edit System Configuration interface in Contrail Command showing network settings like Always Compare MED, IGMP, Security Policy Draft, Fast Convergence enabled, NH Reachability disabled, and XMPP Hold Time set to 9, with Cancel and Save buttons.

    • Fast Convergence—Select this check box to enable convergence.

    • NH Reachability—Select this check box to preform next-hop reachability check for gateway and vRouter. This field is displayed only if the Fast Convergence check box is selected.

    • XMPP Hold Time—Enter a value in the range 1—90 in seconds. The XMPP hold time is used to detect vRouter failures. The timer expires when there is a vRouter failure, and the same is propagated to the control node, which in turn initiates convergence.

    Note:

    Before you enable next-hop reachability check for fast convergence, make sure that BGP peering between the spines and control nodes is enabled for family inet/inet6 to exchange tunnel endpoint IP addresses. Also, enable redistribution of /32 vRouter host addresses from the underlay routing table to BGP.
  3. Click Save to complete the configuration.

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