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Configuring Spanning Tree Protocol (STP)
To verify that single STP is in effect, enter the following command at any level of the CLI:
HP9300(config) show span
Syntax: show span [vlan <vlan-id>]
Here is an example of the information displayed by this command. Notice that no VLAN IDs are listed in the VLAN
ID column. For STP, all ports are members of VLAN 4094, the single STP VLAN. When you enable single STP, all
the ports in the single spanning tree, regardless of other VLAN membership, are configured as members of port-
based VLAN 4094. This VLAN is used to implement the single spanning tree. VLAN 4094 is used only by single
spanning tree. A port can be a member of VLAN 4094 and another port-based VLAN at the same time without
being tagged. All ports in VLAN 4094 share a common STP domain, but for all other traffic, the ports remain
within the separate Layer 2 broadcast domains established by the port-based VLANs.
HP9300(config)# show span
Global STP Parameters:
VLAN Root Root Root Prio Max He- Ho- Fwd Last Chg Bridge
ID ID Cost Port rity Age llo ld dly Chang cnt Address
Hex sec sec sec sec sec
800000e052f04f00 0 Root 8000 20 2 2 15 0 0 00e052f04f00
Port STP Parameters:
VLAN Port Prio Path State Fwd Design Design Design
ID Num rity Cost Trans Cost Root Bridge
Hex
1/1 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/2 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/3 80 0 DISABLED 0 0 0000000000000000 0000000000000000
1/4 80 0 DISABLED 0 0 0000000000000000 0000000000000000
.
. some lines omitted for brevity
.
To display VLAN information, including the STP state of each VLAN, enter the following command at any CLI level:
HP9300(config)# show vlan
Syntax: show vlan [<vlan-id> | ethernet <portnum>]
HP9300(config)# show vlan
Total PORT-VLAN entries: 3
Maximum PORT-VLAN entries: 8
legend: [S=Slot]
PORT-VLAN 1, Name DEFAULT-VLAN, Priority level0, in single spanning tree domain
Untagged Ports: (S1) 1 2 3 4 5 6 7 8
Untagged Ports: (S2) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Untagged Ports: (S2) 17 18 19 20 21 22 23 24
Untagged Ports: (S4) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Untagged Ports: (S4) 17 18 19 20 21 22 23 24
Untagged Ports: (S6) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Untagged Ports: (S6) 17 18 19 20 21 22 23 24
Tagged Ports: None
SINGLE-SPANNING-TREE-VLAN, Name Single-spanning-tree-vlan, Priority level0, in
single spanning tree domain
Untagged Ports: (S1) 1 2 3 4 5 6 7 8
Untagged Ports: (S2) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Untagged Ports: (S2) 17 18 19 20 21 22 23 24
Untagged Ports: (S4) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
5 - 19