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610 CHAPTER 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-snooping command to enable Digest Snooping.