3Com MSR 30, MSR 50 manual Stp config-digest-snooping

610CHAPTER 38: MSTP CONFIGURATION COMMANDS

dot1s: Configures the port(s) to receive and send only standard-format (802.1s-compliant) MSTP BPDUs.

legacy: Configures the port(s) to receive and send only compatible-format MSTP BPDUs.

Description Use the stp compliance command to configure the mode the port(s) will use to recognize and send MSTP BPDUs.

Use the undo stp compliance command to restore the default.

The default mode is auto, namely all ports recognize the BPDU format automatically.

Note that:

■Configured in Ethernet interface view, the setting is effective on the current port only; configured in port group view, the setting is effective on all the ports in the port group.

■If the mode is set to auto on a port, the port automatically recognizes and resolves the received compatible-format BPDUs or 802.1s-compliant BPDUs, and sends, when needed, compatible-format or 802.1s-compliant BPDUs.

■If the mode is set to legacy or dot1s, on a port, the port can only receive and send BPDUs of the specified format. If the port is configured not to detect the packet format automatically while it works in the MSTP mode, and if it receives a packet in the format other than as configured, that port will become a designated port, and the port will remain in the discarding state to prevent the occurrence of a loop.

Examples # Configure Ethernet 1/1 to receive and send only standard-format (802.1s) MSTP packets.

<Sysname>system-view

[Sysname-Ethernet1/1] stp compliance dot1s

Restore the default mode for port Ethernet 1/1 to recognize and send MSTP

BPDUs.

[Sysname-Ethernet1/1] undo stp compliance

stp config-digest-snooping

Syntax stp config-digest-snooping

undo stp config-digest-snooping

View System view, Ethernet interface view, port group view

Parameters None

Description Use the stp config-digest-snoopingcommand to enable Digest Snooping.