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Commands for MSTP
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instance.
Example: On the port1/2, set the port cost is 3000000.
Switch(Config-If-Ethernet1/2)#spanning-tree cost 3000000
17.1.10 spanning-tree digest-snooping
Command: spanning-tree digest-snooping
no spanning-tree digest-snooping
Function: Configure the port to use the authentication string of partner port; the
command “no spanning-tree digest-snooping” restores to use the port generated
authentication string.
Parameter: None
Command mode: Port Mode
Default: Don’t use the authentication string of partner port.
Usage Guide: According to MSTP protocol, the region authentication string is generated
by MD5 algorithm with public authentication key, intstance ID, VLAN ID. Some
manufactory don’t use the public authentication key, this causes the incompatibility. After
the command is executed the port can use the authentication string of partner port,
realize compatibility with these manufactories equipment.
Note: Because the authentication string is related to instance ID and VLAN ID, the
command may cause recognizing the equipment that with different instance and VLAN
relation as in the same region. Before the command is executed, make sure that
instance and VLAN relation is accord for all the equipment. If there are more than one
equipment connected, all the connected ports should execute this command.
Example: Configure the authentication string of partner port.
Switch(config)#interface ethernet 1/2
Switch(Config-If-Ethernet1/2)#spanning-tree digest-snooping
Switch(Config-If-Ethernet1/2)#
17.1.11 spanning-tree format
Command: spanning-tree format {standard | privacy | auto}
no spanning-tree format
Function: Configure the format of the port packet so to be interactive with products of
other companies. The no command restores the default format.
Parameter: standard: The packet format provided by IEEE
privacy: Privacy packet format, which is compatible with CISCO
equipments.
auto: Auto identified packet format, which is determined by checking the