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    RSTP or VSTP Forced to Run as IEEE 802.1D STP

    In a Layer 2 environment, you can force the configured Rapid Spanning-Tree Protocol (RSTP) or VLAN Spanning-Tree Protocol (VSTP) to run as the original IEEE 802.1D Spanning-Tree Protocol (STP) version. Configure this option for compatibility with older bridges that do not support RSTP or VSTP.

    To configure RSTP or VSTP to run as IEEE 802.1D STP, you need to add force-version statement to the RSTP or VSTP configuration:

    user@host #set force-version

    Keep the following limitations in mind when RSTP or VSTP are run as the original STP version:

    • If you configure an instance interface as an edge port, the configuration statement is ignored.
    • If you configure point-to-point link mode for an instance interface, the configuration statement is ignored.

    Modified: 2015-12-10