KB.15.15

NOTE: If multiple switches in the same MST region have the same priority setting,

then the switch with the lowest MAC address becomes the root switch for that region.

Enabling SNMP traps

Syntax:

[no] spanning-tree trap { errant-bpdu | loop-guard | new-root |

root-guard }

Enables or disables SNMP traps for errant-BPDU, loop guard, new root, and root

guard event notifications. Note that this command is designed to be used in

conjunction with the spanning-tree bpdu-filter command and the

bpdu-protection command.

errant-bpdu Enables SNMP notification when an errant BPDU is received.

Designed for use with BPDU filtering.

loop-guard Enables SNMP notification when a loop guard inconsistency is

detected. Designed for use with the Loop Guard option.

new-root Enables SNMP notification when a new root is elected on any

VLAN configured for MSTP on the switch.

root-guard Enables SNMP notification when a root guard inconsistency is

detected.

Default for all of the above options: Disabled

Theno form of the command disables traps on the switch.

Configuring MSTP per-port parameters

In an MSTP topology, per-port parameters are set in the global configuration context. In most cases,

HP recommends that you use the default settings for these parameters and apply changes on a

per-port basis only where a non-default setting is clearly indicated by the circumstances of individual

links. Some port parameters (such as admin-edge-port) affect all MSTI instances that consist

of VLANs configured on the port. Other port parameters (such as path-cost) affect only the

specified MST.

Enabling immediate transition to forwarding on end nodes

Syntax:

[no] spanning-tree port-list admin-edge-port

Enables admin-edge-port on ports connected to end nodes. During spanning

tree establishment, ports with admin-edge-port enabled transition immediately

to the forwarding state. If a bridge or switch is detected on the segment, the port

automatically operates as non-edge, not enabled.

Default: Disabled

If admin-edge-port is disabled on a port and auto-edge-port has not been

disabled, the auto-edge-port setting controls the behavior of the port.

The no form of this command disables edge port operation on the specified ports.

Identifying edge ports automatically

Syntax:

[no] spanning-tree port-list auto-edge-port

Configuring MSTP per-port parameters 83