R3102-R3103-HP 6600/HSR6600 Routers High Availability Configuration Guide

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NOTE:
The total bandwidth reserved for subclass A0 by the stations on a ringlet must be less than the ringlet
bandwidth.
Configuring station weight
On an RPR ring, bandwidth resources are shared among stations. When traffic size is small, RPR can
handle bandwidth requests of all stations on the ring. When traffic size gets heavy, congestion might
occur. To prevent some stations from taking advantage of their spatially or chronologically favorable
position on the ring to occupy excessive bandwidth, RPR adopts a fairness algorithm to ensure
bandwidth allocation fairness.
The fairness algorithm of RPR mainly regulates class B-EIR and class C traffic on the RPR ring. You can
assign a weight to a station to adjust the ratio of its available service bandwidth to the total
non-reserved bandwidth on a ringlet. The fairness weight of a station is configured as an exponent of
two.
To configure the fairness weight of an RPR station on a ringlet:
Step
Command
Remarks
1. Enter system view.
system-view
N/A
2. Enter RPR logical interface
view.
interface rpr interface-number
N/A
3. Configure the weight of the
station.
rpr weight { ringlet0 | ringlet1 }
value
By default, the weight is 2
0
=1.
Configuring RPR timers
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: