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3Com Switch 7750 Series
Command Reference Guide – MSTP Chapter 1
MSTP Configuration Commands
1-18
Note:
z The digest snooping feature is needed only when your Switch 7750 series switch is
connected to partner's proprietary protocol-adopted switches.
z To enable the digest snooping feature successfully, you must first enable it on all the
ports of your Switch 7750 series switch that are connected to partner's proprietary
protocol-adopted switches and then enable it globally.
z To enable the digest snooping feature, the interconnected switches must be
configured with exactly the same MST region-related configuration.
z The digest snooping feature must be enabled on all the ports of your Switch 7750
series switch that are connected to partners' proprietary protocol-adopted switches
in the same MST region.
z With the digest snooping feature enabled, the VLAN-to-MSTI mapping cannot be
modified.
z The digest snooping feature is not applicable to MST region edge ports.
Example
# Enable the digest snooping feature on Ethernet1/0/1 port in system view.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] stp interface Ethernet 1/0/1 config-digest-snooping
1.1.17 stp interface cost
Syntax
stp interface interface-list [ instance instance-id ] cost cost
undo stp interface interface-list [ instance instance-id ] cost
View
System view
Parameter
interface-list: Ethernet port list. You can specify multiple Ethernet ports by providing this
argument in the form of interface-list = { interface-type interface-number [ to
interface-type interface-number ] } &<1-10>, where &<1-10> means that you can
provide up to 10 port indexes/port index ranges for this argument.
instance-id: Spanning tree instance ID ranging from 0 to 16. A value of 0 specifies the
CIST.
cost: Port path cost to be set. This argument ranges from 1 to 200,000,000.