Configuring The Hold Off Timer; Configuring The Keepalive Timer; Configuring The Topology Stability Timer; Configuring The Tc Timers - HPE FlexNetwork HSR6800 series Configuration Manual

Configuring the hold off timer

The hold off timer defines the delay for the physical layer to report a protection request after
detecting a link failure.
To configure the hold off timer:
Step
1. Enter system view.
2. Enter RPR logical interface
view.
3. Set the hold off timer.

Configuring the keepalive timer

A station sends single choke fairness frames (SCFFs) periodically to notify the neighbor stations of
its normal operation state. When a station fails to receive an SCFF, a keepalive timer starts. If no
SCFF frame is received after the timer expires, the station sends an SF protection request.
To configure the keepalive timer:
Step
1. Enter system view.
2. Enter RPR logical interface
view.
3. Set the keepalive timer.

Configuring the topology stability timer

When a station detects a topology change on the ring, it starts the topology stability timer and begins
to collect topology information to update its topology database. After the timer expires, the station
checks the validity of received topology information. If the information is valid, the station enters
topology valid state. If not, the station restarts the timer.
To configure the topology stability timer:
Step
1. Enter system view.
2. Enter RPR logical interface
view.
3. Set the topology stability
timer.

Configuring the TC timers

The TC fast/slow timer defines the fast/slow interval at which TC frames are sent. When the ring
topology checksum changes, five TC frames are sent at the fast interval. When the ring topology is
stable, TC frames are sent at the slow interval.
Command
system-view
interface rpr interface-number
rpr timer holdoff holdoff-value
Command
system-view
interface rpr interface-number
rpr timer keepalive
keepalive-value
Command
system-view
interface rpr interface-number
rpr timer stability stability-value
63
Remarks
N/A
N/A
0 milliseconds by default.
Remarks
N/A
N/A
3 milliseconds by default.
Remarks
N/A
N/A
40 milliseconds by default.