Configuring station weight, Configuring rpr timers – H3C Technologies H3C SR8800 User Manual
Page 42
33
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 reserved
bandwidth or rate limit for a
class on a certain ringlet.
rpr rate-limiter { high | low |
medium | reserved } { ringlet0 |
ringlet1 } value
By default, no bandwidth is
reserved for subclass A0; the rate
limit is 2‰ for subclass A1, 0‰
for class B-CIR, and 1000‰ for
B-EIR and class C.
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 well. When traffic size gets heavy, congestion may
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 2.
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
These are the RPR timer configuration tasks:
•
•
Configuring the hold off timer
•
Configuring the keepalive timer
•
Configuring the topology stability timer
•
•
•