3com 2928 User Guide
1-23
Field
Description
Num of Vlans Mapped
Number of VLANs mapped to the current MSTI
PortTimes
Major parameters for the port:
z
Hello: Hello timer
z
MaxAge: Max Age timer
z
FWDly: Forward delay timer
z
MsgAge: Message Age timer
z
Remain Hop: Remaining hops
BPDU Sent
Statistics on sent BPDUs
BPDU Received
Statistics on received BPDUs
Protocol Status
Whether MSTP is enabled
Protocol Std.
MSTP standard
Version MSTP
version
CIST Bridge-Prio.
Priority of the current device in the CIST
MAC address
MAC address of the current device
Max age(s)
Maximum age of a configuration BPDU
Forward delay(s)
Port state transition delay, in seconds
Hello time(s)
Configuration BPDU transmission interval, in seconds
Max hops
Maximum hops of the current MST region
MSTP Configuration Example
Network requirements
Configure MSTP in the network shown in
to enable packets of different VLANs to be
forwarded along different MSTIs. The detailed configurations are as follows:
z
All devices on the network are in the same MST region.
z
Packets of VLAN 10, VLAN 20, VLAN 30, and VLAN 40 are forwarded along MSTI 1, MSTI 2, MSTI
3, and MSTI 0 respectively.
3, and MSTI 0 respectively.
z
Switch A and Switch B operate at the distribution layer; Switch C and Switch D operate at the
access layer. VLAN 10 and VLAN 20 are terminated on the distribution layer devices, and VLAN 30
is terminated on the access layer devices, so the root bridges of MSTI 1 and MSTI 2 are Switch A
and Switch B respectively, while the root bridge of MSTI 3 is Switch C.
access layer. VLAN 10 and VLAN 20 are terminated on the distribution layer devices, and VLAN 30
is terminated on the access layer devices, so the root bridges of MSTI 1 and MSTI 2 are Switch A
and Switch B respectively, while the root bridge of MSTI 3 is Switch C.