Displaying Stp Information - Foundry Networks Switch and Router Installation And Configuration Manual

Displaying STP Information

You can display the following STP information:
• All the global and interface STP settings
• CPU utilization statistics
• Detailed STP information for each interface
• STP state information for an individual interface
• STP state information for a port-based VLAN
Displaying STP Information for an Entire Device
To display STP information for an entire device, use either of the following methods.
USING THE CLI
To display STP information, enter the following command at any level of the CLI:
BigIron(config)# show span
Global STP Parameters:
VLAN Root
ID ID
1 800000e052a9bb40 0
Port STP Parameters:
VLAN Port Prio Path State
ID Num rity Cost
Hex
1 3/1 80 19
1 3/2 80 0
1 3/3 80 0
1 3/4 80 0
1 3/5 80 0
1 3/6 80 0
1 3/7 80 0
1 3/8 80 0
1 3/9 80 0
1 3/10 80 0
Syntax: show span [vlan <vlan-id>] | [pvst-mode] | [<num>]
The vlan <vlan-id> parameter displays STP information for the specified port-based VLAN.
The pvst-mode parameter displays STP information for the device's Per VLAN Spanning Tree (PVST+)
compatibility configuration. See "PVST/PVST+ Compatibility" on page 12-23.
The <num> parameter displays only the entries after the number you specify. For example, on a device with three
port-based VLANs, if you enter 1, then information for the second and third VLANs is displayed, but information for
the first VLAN is not displayed. Information is displayed according to VLAN number, in ascending order. The
entry number is not the same as the VLAN number. For example, if you have port-based VLANs 1, 10, and 2024,
then the command output has three STP entries. To display information for VLANs 10 and 2024 only, enter show
span 1.
December 2000
Root Root Prio Max He- Ho- Fwd Last
Cost Port rity Age llo ld
Hex sec sec sec sec sec
Root 8000 20
Fwd Design Design
Trans Cost
ENABLED 2 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
DISABLED 0 0
Configuring Spanning Tree Protocol (STP) and IronSpan
dly Chang
2 2 15 0
Root
800000e052a9bb40 800000e052a9bb40
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
0000000000000000 0000000000000000
Chg Bridge
cnt Address
6 00e052a9bb40
Design
Bridge
12 - 7