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Configuration Guide - IP Unicast Routing

S9300, S9300E, and S9300X V200R011C10

This document describes IP Unicast Routing configurations supported by the switch, including the principle and configuration procedures of IP Routing Overview, Static Route, RIP, RIPng, OSPF, OSPFv3, IS-IS(IPv4), IS-IS(IPv6), BGP, Routing Policy ,and PBR, and provides configuration examples.
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Configuring BFD for OSPF

Configuring BFD for OSPF

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ospf [ process-id ]

    The OSPF view is displayed.

  3. Run bfd all-interfaces enable

    BFD for OSPF is enabled, and BFD sessions are created.

    If all the interfaces in a single process are configured with BFD and their neighbor relationships are in the Full state, OSPF establishes BFD sessions on all the interfaces in the process.

  4. (Optional) run bfd all-interfaces { min-rx-interval receive-interval | min-tx-interval transmit-interval | detect-multiplier multiplier-value } *

    Parameters are set for the BFD sessions.

    • The parameter min-rx-interval receive-interval specifies the expected minimum interval for receiving BFD packets from the neighbor.
    • The parameter min-tx-interval transmit-interval specifies the minimum interval for sending BFD packets to the neighbor.
    • The parameter detect-multiplier multiplier-value specifies the local detection multiplier.
    NOTE:

    Using the default receive-interval, transmit-interval, and multiplier-value values is recommended.

    Configure parameters based on the network status and network reliability requirements. A short interval between BFD packet transmission can be configured if high network reliability is required.

    NOTE:
    • Actual interval between BFD packet transmission on the local switch = Max { configured interval transmit-interval between BFD packet transmission on the local switch, configured interval receive-interval between BFD packet receipt on the peer switch }
    • Actual interval between BFD packet receipt on the local switch = Max { configured interval transmit-interval between BFD packet transmission on the peer switch, configured interval receive-interval between BFD packet receipt on the local switch }
    • Actual time for detecting BFD packets = Actual interval between BFD packet receipt on the local switch x Configured detection multiplier multiplier-value on the peer switch

    For example, if

    • On the local switch, the configured interval between BFD packet transmission is 200 ms; the configured interval between BFD packet receipt is 300 ms; the detection multiplier is 4.
    • On the peer switch, the configured interval between BFD packet transmission is 100 ms; the configured interval between BFD packet receipt is 600 ms; the detection multiplier is 5.

    Then:

    • On the local switch, the actual interval between BFD packet transmission is 600 ms calculated by using the formula max {200 ms, 600 ms}; the interval between BFD packet receipt is 300 ms calculated by using the formula max {100 ms, 300 ms}; the detection period is 1500 ms calculated by multiplying 300 ms by 5.
    • On the peer switch, the actual interval between BFD packet transmission is 300 ms calculated by using the formula max {100 ms, 300 ms}, the actual interval between BFD packet receipt is 600 ms calculated by using the formula max {200 ms, 600 ms}, and the detection period is 2400 ms calculated by multiplying 600 ms by 4.

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Updated: 2019-10-22

Document ID: EDOC1000178418

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