Quality of Service |
863
Configure policy-based rate shaping
Rate shape egress traffic using the command
rate-shape
from QOS-POLICY-OUT mode. Output QoS
policy can be applied to an output policy map with a policy aggregate or to an specific queue. Per queue
rate shaping is supported on C-Series and S-Series only; see
Create Output Policy Maps on page 868
.
FTOS#conf t
FTOS(conf)#qos-policy-output QosShape
FTOS(conf-qos-policy-out)# rate-shape 4 10
FTOS(conf-qos-policy-out)#show config
!
qos-policy-output
QosShape rate-shape 4 10
FTOS(conf-qos-policy-out)#exit
Allocate bandwidth to queue
The E-Series schedules unicast, multicast, and replication traffic for egress based on the Weighted Fair
Queuing algorithm. The C-Series and S-Series schedule packets for egress based on Deficit Round Robin
(DRR). These strategies both offer a guaranteed data rate.
To allocate an amount bandwidth to a queue using the command
bandwidth-percentage
on the E-Series.
To allocate bandwidth to queues on the C-Series and S-Series, assign each queue a weight ranging from 1
to 1024, in increments of 2
n
, using the command
bandwidth-weight
.
Table 41-3
shows the default
bandwidth weights for each queue, and their equivalent percentage which is derived by dividing the
bandwidth weight by the sum of all queue weights.
There are two key differences between allocating bandwidth by weight on the C-Series and S-Series and
allocating bandwidth by percentage on the E-Series:
1. Assigning a weight to one queue affects the amount of bandwidth that is allocated to other queues.
Therefore, whenever you are allocating bandwidth to one queue, Dell Force10 recommends that you
evaluate your bandwidth requirements for all other queues as well.
2. Because you are required to choose a bandwidth weight in increments of 2
n
you may not be able to
achieve exactly a target bandwidth allocation.
Table 41-3. Default Bandwidth Weights for C-Series and S-Series
Queue
Default Weight
Equivalent
Percentage
0
1
6.67%
1
2
13.33%
2
4
26.67%
3
8
53.33%
Summary of Contents for Force10 E300
Page 1: ...FTOS Configuration Guide FTOS 8 4 2 7 E Series TeraScale C Series S Series S50 S25 ...
Page 32: ...32 w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 132: ...132 802 1X w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 310: ...310 Configuration Replace and Rollback w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 330: ...330 Dynamic Host Configuration Protocol w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 402: ...402 High Availability w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 462: ...462 Interfaces w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 482: ...482 IPv4 Addressing w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 506: ...506 IPv6 Addressing w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 582: ...582 Layer 2 w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 642: ...642 Multicast Source Discovery Protocol w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 662: ...662 Multiple Spanning Tree Protocol w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 690: ...690 Object Tracking w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 754: ...754 PIM Dense Mode w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 784: ...784 PIM Source Specific Mode w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 800: ...800 Power over Ethernet w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 876: ...876 Quality of Service w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 892: ...892 Routing Information Protocol w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1006: ...1006 Simple Network Management Protocol w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1018: ...1018 SONET SDH w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1048: ...1048 Broadcast Storm Control w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1096: ...1096 Uplink Failure Detection UFD w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1098: ...1098 Upgrade Procedures w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1196: ...1196 C Series Debugging and Diagnostics w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1252: ...1252 Standards Compliance w w w d e l l c o m s u p p o r t d e l l c o m ...
Page 1262: ...1262 Index w w w d e l l c o m s u p p o r t d e l l c o m ...