User`s guide

XSR User’s Guide 221
Chapter 10 Mechanisms to Provide QoS
Configuring Quality of Service
In the following example, class bus has a minimum threshold of 460. RED will
start to randomly (with a probability between 0 and 1/10) discard packets
when its queue grows over 460 packets. It will start to discard each packet
when the queue holds more than 550 packets.
NOTE
Drop Tail and RED cannot be used on the same queue at the same time. -
queue-limit and random-detect are mutually exclusive. If random-detect is set on
a queue, queue-limit cannot be set on the same queue until RED is removed.
XSR(config)#policy-map ppwe
XSR(config-pmap<ppwe>)#class voip
XSR(config-pmap-c<voip>)#priority high 64 1000
XSR(config-pmap<ppwe>)#class bus
XSR(config-pmap-c<bus>)#bandwidth 168
XSR(config-pmap-c<bus>)#random-detect 460 550 10
Per Interface Configuration
QoS can be configured on both LAN and WAN interfaces. It can be enabled
on Frame Relay and PPP interfaces, and on a sub interface (Frame Relay
only). The following table illustrates the options:
Table 11 Configuration Options by LAN/WAN Interface
FastEth Serial PPP MLPPP Dialer FR DLCI
CBWFQ Y Y Y N Y Y
Priority Queue Y Y Y N Y Y
Traffic Policing Y Y Y N Y Y
Random Early Detect Y Y Y N Y Y