H3C Technologies H3C SR8800 - Manual (Page 43)

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Configuring the ATD timer
The ATD timer defines the interval at which attribute discovery frames are sent.
To configure the ATD timer:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RPR logical interface
view.
interface rpr interface-number N/A
3. Set the ATD timer. rpr timer atd atd-value 1 second by default.
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 Command Remarks
1. Enter system view. system-view N/A
2. Enter RPR logical interface
view.
interface rpr interface-number N/A
3. Set the hold off timer. rpr timer holdoff holdoff-value 0 milliseconds by default.
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 Command Remarks
1. Enter system view. system-view N/A
2. Enter RPR logical interface
view.
interface rpr interface-number N/A
3. Set the keepalive timer. rpr timer keepalive keepalive-value 3 milliseconds by default.
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 re-starts the timer.
To configure the topology stability timer: