Configuring Port Role Restriction; Configuring Tc-Bpdu Transmission Restriction - HP 6125XLG Configuration Manual

Step
3. Enable the loop guard
function for the ports.

Configuring port role restriction

CAUTION:
Use this feature with caution, because enabling port role restriction on a port might affect the connectivity
of the spanning tree topology.
The bridge ID change of a device in the user access network might cause a change to the spanning tree
topology in the core network. To avoid this problem, you can enable port role restriction on a port. With
this feature enabled, when the port receives a superior BPDU, it becomes an alternate port rather than a
root port.
Make this configuration on the port that connects to the user access network.
To configure port role restriction:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet or
aggregate interface view.
3. Enable port role restriction.

Configuring TC-BPDU transmission restriction

CAUTION:
Enabling TC-BPDU transmission restriction on a port might cause the previous forwarding address table to
fail to be updated when the topology changes.
The topology change to the user access network might cause the forwarding address changes to the core
network. When the user access network topology is unstable, the user access network might affect the
core network. To avoid this problem, you can enable TC-BPDU transmission restriction on a port. With
this feature enabled, when the port receives a TC-BPDU, it does not forward the TC-BPDU to other ports.
Make this configuration on the port that connects to the user access network.
To configure TC-BPDU transmission restriction:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet or
aggregate interface view.
3. Enable TC-BPDU transmission
restriction.
Command
stp loop-protection
Command
system-view
interface interface-type
interface-number
stp role-restriction
Command
system-view
interface interface-type
interface-number
stp tc-restriction
115
Remarks
By default, loop guard is
disabled.
Remarks
N/A
N/A
By default, port role restriction is
disabled.
Remarks
N/A
N/A
By default, TC-BPDU transmission
restriction is disabled.