Configuring Quality of Service Parameters
This section discusses quality of service (QoS) parameters that can be configured for the 1700 series
platforms when using the ADSL WIC. The following features are included:
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Low Latency Queuing (Priority Queuing with Class-Based Weighted Fair
Queuing)
Low latency queuing (LLQ) allows strict priority queuing (PQ) to class-based weighted fair queuing
(CBWFQ). This priority queuing allows delay-sensitive data such as voice packets to be de-queued and
sent before other packet traffic, reducing jitter in voice conversations. To configure LLQ, enter the
priority command under the CBWFQ configuration.
Configuration Example
The following example shows a Cisco 1751 router configured with LLQ.
hostname zorro
username ruby-1 password 7 36497A4872384A
!
class-map match-all VOIP
match ip dscp 32
class-map CRITICAL
match access-group 100
!
policy-map 1751_ADSL
class CRITICAL
priority 48
class VOIP
bandwidth 64
set ip precedence 6
!
interface Loopback1
ip address 10.0.0.10 255.255.255.252
!
interface ATM0/0
dsl operating-mode auto
no ip address
no atm ilmi-keepalive
!
OL-3317-03
Low Latency Queuing (Priority Queuing with Class-Based Weighted Fair Queuing)
DiffServ
Committed Access Rate
Multilink PPP over ATM with Link Fragmentation and Interleaving
Weighted Random Early Detection
ATM per-VC Queuing and VC Bundling
ATM Cell Loss Priority Bit Marking
Compressed RTP
Tunable Transmission Ring
MLP Bundling
Configuring an ADSL WAN Interface Card on Cisco 1700 Series Routers
Configuring Quality of Service Parameters
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