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

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Configuring default ringlet selection
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 default ringlet
selection.
rpr default-rs { ringlet0 | ringlet1 }
Optional.
By default, the default ringlet is
Ringlet 0.
NOTE:
When a span is faulty and unable to forward data on the default ringlet configured, another ringlet works
as the default ringlet.
Configure the RPR fairness algorithm
By configuring the RPR fairness algorithm, you can better guarantee the transmission quality over RPR
rings.
Configuring reserved bandwidth or rate limiting
RPR traffic includes three classes: class A, class B, and class C, with decreasing priorities.
 Class A is further divided into two subclasses: A0 and A1. RPR can reserve bandwidth for
subclass A0. When congestion occurs, the unused reserved bandwidth cannot be used by lower
priority traffic. Subclass A1 is rate limited. When congestion occurs, subclass A1 allows lower
priority traffic to use its unused bandwidth, and bandwidth allocation is regulated by the fairness
algorithm.
 Class B can also be divided into two subclasses: B-CIR and B-EIR. For class B traffic, the portion
within the predefined rate limit belongs to class B-CIR and the portion exceeding the limit
belongs to class B-EIR. Similar to traffic of class C, traffic of class B-EIR is regulated by the
fairness algorithm.
 Traffic of class C is regulated by the fairness algorithm and takes the lowest priority.
To configure reserved bandwidth or rate limit for a certain traffic class:
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.