Cisco WS-C2950SX-48-SI Configuration Manual page 130

Using MISTP-PVST+ or MISTP
Bridge ID Priority
VLANs mapped:
Bridge Max Age 20 sec
Port
------------------------ ---- ------------- --------- ---- -------- ----------
1/1
3/1
3/25
3/26
3/27
3/28
3/29
3/30
7/1-4
7/5
7/6
8/37
8/38
15/1
16/1
Console> (enable)
Configuring the MISTP Port Priority
You can configure the port priority of switch ports. The port with the lowest priority value forwards
frames for all VLANs. The possible port priority value is from 0–63; the default is 32. If all ports have
the same priority value, the port with the lowest port number forwards frames.
To configure the port priority for a port, perform this task in privileged mode:
Task
Step 1
Configure the port priority for a switch port.
Step 2
Verify the port priority setting.
This example shows how to configure the port priority and verify the configuration:
This example shows how to configure the port priority and verify the configuration:
Console> (enable) set spantree portpri 1/1 32
Bridge port 1/1 port priority set to 32.
Console> (enable) show spantree mistp-instance 1
Instance 1
Spanning tree mode
Spanning tree type
Spanning tree instance enabled
Designated Root
Designated Root Priority
Designated Root Cost
Designated Root Port
VLANs mapped:
Root Max Age
Bridge ID MAC ADDR
Bridge ID Priority
VLANs mapped:
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
7-34
32769 (bridge priority:32768, sys ID ext:1)
1,74
Hello Time 2
Inst Port-State
1 forwarding
1 forwarding
1 forwarding
1 forwarding
1 forwarding
1 forwarding
1 forwarding
1 forwarding
1 blocking
1 forwarding
1 forwarding
1 blocking
1 blocking
1 forwarding
1 forwarding
MISTP
ieee
00-05-31-40-64-00
32769 (root priority:32768, sys ID ext:1)
20000
1/1
1,74
20 sec Hello Time 2
00-d0-02-27-9c-00
32769 (bridge priority:32768, sys ID ext:1)
1,74
sec Forward Delay 15 sec
Cost Prio Portfast Channel_id
20000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
5000 32 disabled 833
20000 32 disabled 0
20000 32 disabled 0
200000 32 disabled 0
200000 32 disabled 0
20000 32 enabled
20000 32 enabled
Command
set spantree portpri mod_num/port_num priority
[instance]
show spantree mistp-instance instance
[mod_num/port_num] active
sec Forward Delay 15 sec
—
Release 8.1
Chapter 7 Configuring Spanning Tree
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