3com MSR 20-20 참조 매뉴얼

C

HAPTER

 38: MSTP C

ONFIGURATION

 C

OMMANDS

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.

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.

# 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 

System view, Ethernet interface view, port group view

None

Use the stp config-digest-snooping command to enable Digest Snooping.