Table Of Contents
Voice and Quality of Service Features for ADSL on Cisco 2600 and 3600 Series Routers
Class-Based Packet Marking with DSCP
Dial-Peer DSCP and IP Precedence Marking
Class-Based Weighted Fair Queuing
Class-Based WRED with DSCP (egress)
Per-ATM VC Shaping for VBR-NRT
Additional Features Supported in Release 12.2(2)XK
Supported Standards, MIBs, and RFCs
Differentiated Data Services Example
Verifying the Differentiated Data Services Configuration
Voice and Quality of Service Features for ADSL on Cisco 2600 and 3600 Series Routers
Feature History
Release Modification12.2(2)XK
Voice and quality of service features for ADSL were introduced for Cisco 2600 and 3600 series routers.
This document describes the voice and quality of service (QoS) features for asymmetric digital subscriber lines (ADSL) on Cisco 2600 and 3600 series routers in Cisco IOS Release 12.2(2)XK.
For information about QoS features on Cisco 1700 series routers, refer to the following document:
Cisco IOS Software Release 12.2(2)XQ1
This document includes the following sections:
•Supported Standards, MIBs, and RFCs
Feature Overview
Cisco 2600 and 3600 series routers with an ADSL WAN interface card support the integration of voice and data over the same ADSL circuit using Voice over IP (VoIP) and Voice over ATM (VoATM). QoS features make it possible to effectively combine voice and data traffic in the same WAN connection without sacrificing quality and reliability. Service providers can increase revenue by building differentiated service options based on premium, standard, or best-effort service classes.
The following voice and QoS features are supported in the 12.2(2)XK release:
Note To configure these voice and QoS features, you must first install and configure the ADSL WAN interface card on your Cisco 2600 or 3600 router. Refer to the installation and configuration instructions in the following document:
1-Port ADSL WAN Interface Card for Cisco 2600 Series and 3600 Series Routers, Release 12.2(4)T
–Class-Based Packet Marking with DSCP
–Dial-Peer DSCP and IP Precedence Marking
–Class-Based Weighted Fair Queuing
–Class-Based WRED with DSCP (egress)
–Per-ATM VC Shaping for VBR-NRT
•Additional Features Supported in Release 12.2(2)XK
Classification and Marking
The following existing Cisco IOS classification and marking features are now supported on ADSL:
•Class-Based Packet Marking with DSCP
•Dial-Peer DSCP and IP Precedence Marking
Class-Based Packet Marking with DSCP
For information about class-based packet marking with differentiated services code point (DSCP), refer to the following document:
The chapter "Quality of Service Overview" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
Committed Access Rate
For information about committed access rate (CAR), refer to the following document:
The chapter "Quality of Service Overview" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release12.2
Dial-Peer DSCP and IP Precedence Marking
For information about dial-peer DSCPs and IP precedence marking, refer to the following document:
The chapter "Quality of Service Overview" in Cisco IOS Quality of Service Solutions
Queuing and Scheduling
The following existing Cisco IOS queuing and scheduling features are now supported on ADSL:
•Class-Based Weighted Fair Queuing
Class-Based Weighted Fair Queuing
For information about class-based weighted fair queuing (CBWFQ), refer to the following document:
The chapter "Quality of Service Overview" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
Low Latency Queuing
For information about low latency queuing (LLQ), refer to the following documents:
•The chapter "Congestion Management Overview" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
•The chapter "Quality of Service for Voice over IP" in Cisco IOS Quality of Service Solutions
Note Setting the tx ring works in conjunction with low latency queuing. (For more information, see the section "Selectable Transmission Ring.")
Driver Per-VC Queuing
In Cisco IOS Release 12.2(2)XK, per-virtual circuit (per-VC) queuing is supported on ADSL interfaces at the driver level, similar to VC-queuing features on other ATM interfaces. This feature underlies many of the IOS QoS queuing features, such as LLQ.
For more information about per-VC queuing, refer to the following documents:
•Understanding Weighted Fair Queuing on ATM
•Per-VC Class-Based, Weighted Fair Queuing (Per-VC CBWFQ) on the Cisco 7200, 3600, and 2600 Routers
Congestion Avoidance
The following existing Cisco IOS congestion avoidance feature is now supported on ADSL:
•Class-Based WRED with DSCP (egress)
Class-Based WRED with DSCP (egress)
Weighted random early detection (WRED) is supported in Release 12.2(2)XK.
For more information about WRED, refer to the following documents:
•The chapter "Quality of Service Overview" in the Cisco IOS Quality of Service Solutions Configuration Guide
•Cisco IOS Quality of Service Solutions Command Reference, Release 12.2
•DiffServ Compliant Weighted Random Error Detection
Policing and Traffic Shaping
The following existing Cisco IOS policing and shaping features are now supported on ADSL:
•Per-ATM VC Shaping for VBR-NRT
Class-Based Policing
For information about traffic classes and traffic policies, refer to the following document:
The chapter "Configuring Traffic Policing" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
Per-ATM VC Shaping for VBR-NRT
For information about per-ATM VC shaping for variable bit rate-nonreal time (VBR-NRT), refer to the following document:
•Understanding the VBR-nrt Service Category and Traffic Shaping for ATM VCs
Link Latency
The following existing Cisco IOS link latency feature is now supported on ADSL:
Selectable Transmission Ring
The transmission ring (tx ring) is the first-in, first-out (FIFO) buffer used to hold frames before transmission at the digital subscriber line (DSL) driver level. The tx ring defines the maximum number of packets that can wait for transmission at Layer 2.
The tx ring complements the ability of LLQ to minimize jitter and latency of voice packets. For maximum voice quality, a low tx ring setting should be used. For maximum data throughput, a high tx ring setting should be used.
You can configure the size of the tx ring for each permanent virtual circuit (PVC). The default value is 24. The value can be changed to 3. (The only permitted values are 24 and 3.) A tx ring setting of 3 is required for latency-critical traffic. For example, when the tx ring limit is configured as 3 and LLQ is configured on the PVC, the worst case delay for a voice packet is the time required to transmit three data packets. When the buffering is reduced by configuring the tx ring limit, the delay experienced by voice packets is reduced by a combination of the tx ring and LLQ mechanism.
Note The size of the tx ring buffer is measured in packets, not bits.
Other (IP QoS)
The following IP QoS features are now supported on ADSL:
Local Policy Routing
For information about local policy routing (LPR), refer to the following documents:
•The chapter "Configuring IP Routing Protocol—Independent Features" in the Cisco IOS IP Configuration Guide, Release 12.2
•The chapter "Configuring IP Routing Protocols" in the Router Products Configuration Guide
Policy-Based Routing
For information about policy-based routing (PBR), refer to the following document:
•The chapter "Quality of Service Overview" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
IP QoS Mapping to ATM CoS
For more information about IP QoS mapping to ATM class of service (CoS), refer to the following document:
The chapter "Configuring IP to ATM Class of Service" in the Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
Access Lists
For information about configuring access lists, refer to the following document:
The chapter "Configuring IP Services" in the Cisco IOS IP Configuration Guide, Release 12.2
Additional Features Supported in Release 12.2(2)XK
The following existing Cisco IOS features are now supported on ADSL:
Multiple PVC Support
For information about PVCs, refer to the following documents:
•The chapter "Wide-Area Networking Overview" in the Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2
•The chapter "Configuring ATM" in the Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2
For caveat information for the Cisco 2600 and 3600 series routers, refer to the following documents:
•Release Notes for Cisco 2600 Series for Cisco IOS Release 12.2 XK
•Release Notes for Cisco 3600 Series for Cisco IOS Release 12.2 XK
RFC1483 Routing
For information about ATM and ATM adaptation layers (AALs), refer to the following document:
•The chapter "Wide-Area Networking Overview" in the Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2
For information regarding AAL5 Subnetwork Access Protocol (AAL5SNAP) encapsulations, refer to the following document:
•The chapter "Configuring ATM" in the Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2
H.323 VoIP
For information about Cisco H.323 VoIP features, refer to the following documents:
•The chapter "Configuring Voice over IP" in the Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2
•The chapter "H.323 Applications" in the Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2
Benefits
QoS provides improved and more predictable network service for ADSL by
•Supporting dedicated bandwidth.
•Improving loss characteristics.
•Avoiding and managing network congestion.
•Shaping network traffic.
•Setting traffic priorities across the network.
Restrictions
•Analog and BRI voice on the NM-1V/2V card are not supported over VoATM in AAL2.
•Refer to the following documents for caveat information for multiple PVCs on Cisco 2600 and 3600 series routers:
–Release Notes for Cisco 2600 Series for Cisco IOS Release 12.2 XK
–Release Notes for Cisco 3600 Series for Cisco IOS Release 12.2 XK
•Multilink Point-to-Point Protocol link fragmentation with interleaving (MLP with LFI) is not supported in this release.
Related Documents
•For information about configuring the ADSL WAN interface card, refer to the following document:
–1-Port ADSL WAN Interface Card for Cisco 2600 Series and 3600 Series Routers, Release 12.2(4)T
•For information about QoS features on Cisco 1700 series routers, refer to the following document:
–Cisco IOS Software Release 12.2(2)XQ1
•For information about voice configuration, refer to the following documents:
–Cisco IOS Voice, Video, and Fax Configuration Guide, Release 12.2
–Cisco IOS Voice, Video, and Fax Command Reference, Release 12.2
•For information about configuring IP, refer to the following documents:
–Cisco IOS IP Configuration Guide, Release 12.2
–Cisco IOS IP Command Reference, Release 12.2 (there are three volumes)
•For information about configuring ATM, refer to the following documents:
–Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2
–Cisco IOS Wide-Area Networking Command Reference, Release 12.2
•For information about configuring QoS, refer to the following documents:
–Cisco IOS Quality of Service Solutions Configuration Guide, Release 12.2
–Cisco IOS Quality of Service Solutions Command Reference, Release 12.2
•For information about dial-peer DSCPs and IP precedence marking, refer to the following document:
–The chapter "Quality of Service for Voice over IP" in Cisco IOS Quality of Service Solutions
•For information about WRED, refer to the following document:
–DiffServ Compliant Weighted Random Error Detection, Release 12.1(5)T
•For information about per-ATM VC shaping for VBR-NRT, refer to the following document:
–Understanding the VBR-nrt Service Category and Traffic Shaping for ATM VCs
•For information about local policy routing, refer to the following document:
–The chapter "Configuring IP Routing Protocols" in the Router Products Configuration Guide
•For caveat information for the Cisco 2600 and 3600 series routers, refer to the following documents:
–Release Notes for Cisco 2600 Series for Cisco IOS Release 12.2 XK
–Release Notes for Cisco 3600 Series for Cisco IOS Release 12.2 XL
Supported Platforms
•Cisco 2600 series routers
•Cisco 3600 series routers
Determining Platform Support Through Feature Navigator
Cisco IOS software is packaged in feature sets that support specific platforms. To get updated information regarding platform support for this feature, access Feature Navigator. Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.
Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image.
To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions at http://www.cisco.com/register.
Feature Navigator is updated regularly when major Cisco IOS software releases and technology releases occur. For the most current information, go to the Feature Navigator home page at the following URL:
Note As of Cisco IOS Release 12.2(2)XK, Feature Navigator does not support features included in this limited-lifetime release.
Supported Standards, MIBs, and RFCs
Standards
No new or modified standards are supported by this feature.
MIBs
No new or modified MIBs are supported by this feature.
To obtain lists of supported MIBs by platform and Cisco IOS release, and to download MIB modules, go to the Cisco MIB website on Cisco.com at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
RFCs
No new or modified RFCs are supported by this feature.
Prerequisites
To configure these voice and QoS features, you must first install and configure the ADSL WAN interface card on your Cisco 2600 or 3600 router. Refer to the installation and configuration instructions in the following document:
•1-Port ADSL WAN Interface Card for Cisco 2600 Series and 3600 Series Routers, Release 12.2(4)T
Configuration Tasks
See the following section to configure the tx ring limit.
•Configuring the Tx Ring Limit (required)
Note For information about configuring the ADSL WAN interface card, refer to the following document:
1-Port ADSL WAN Interface Card for Cisco 2600 Series and 3600 Series Routers, Release 12.2(4)T
Configuring the Tx Ring Limit
To configure the tx ring limit, use the following commands beginning in global configuration mode.
Verifying
The tx ring limit has been set in the following VoIP and data configuration examples:
The following show policy-map interface command output from a Cisco 2600 router displays a service-policy setup:
Router# show policy-map interface atm0/0ATM0/0:VC 0/201 -Service-policy output:VOICE-160-DATA-480Class-map:class-default (match-any)27234 packets, 41109865 bytes30 second offered rate 7000 bps, drop rate 3000 bpsMatch:anyWeighted Fair QueueingQueue:Conversation 73Bandwidth 320 (kbps) Max Threshold 64 (packets)(pkts matched/bytes matched) 27231/41105329(depth/total drops/no-buffer drops) 0/14711/0ForClass-map:class-default (match-any)113187 packets, 140760375 bytes30 second offered rate 1205000 bps, drop rate 787000 bpsMatch:anyThe following show queue command output from a Cisco 2600 router displays the flow of traffic currently being transported over an ATM interface:
Router# show queue atm 0/0Interface ATM0/0 VC 0/201Queueing strategy:weighted fairOutput queue:70/512/64/70462 (size/max total/threshold/drops)Conversations 3/6/64 (active/max active/max total)Reserved Conversations 0/0 (allocated/max allocated)Available Bandwidth 320 kilobits/sec(depth/weight/total drops/no-buffer drops/interleaves) 3/0/0/0/0Conversation 72, linktype:ip, length:72source:192.168.1.2, destination:192.168.1.1, id:0xC77E, ttl:254,TOS:160 prot:17, source port 19406, destination port 16406(depth/weight/total drops/no-buffer drops/interleaves) 1/32384/0/0/0Conversation 23, linktype:ip, length:196source:192.168.1.2, destination:192.168.1.1, id:0x0000, ttl:255,TOS:0 prot:17, source port 18653, destination port 18691(depth/weight/total drops/no-buffer drops/interleaves) 64/32384/65793/0/0Conversation 59, linktype:ip, length:1502source:10.1.1.205, destination:10.10.11.200, id:0x0000, ttl:59,TOS:0 prot:17, source port 500, destination port 500The following show queueing interface command output from a Cisco 2600 router displays the queuing configuration of an ATM interface:
Router# show queueing interface atm0/0Interface ATM0/0 VC 0/201Queueing strategy:weighted fairOutput queue:66/512/64/61642 (size/max total/threshold/drops)Conversations 2/6/64 (active/max active/max total)Reserved Conversations 0/0 (allocated/max allocated)Available Bandwidth 320 kilobits/secThe following show interfaces atm command output from a Cisco 2600 router displays statistics for an ATM interface:
Router# show interfaces atm0/0ATM0/0 is up, line protocol is upHardware is DSLSAR (with Alcatel ADSL Module)Internet address is 192.168.1.2/24MTU 4470 bytes, sub MTU 4470, BW 800 Kbit, DLY 2560 usec,reliability 255/255, txload 166/255, rxload 21/255Encapsulation ATM, loopback not setEncapsulation(s):AAL5 AAL2, PVC mode23 maximum active VCs, 256 VCs per VP, 2 current VCCsVC idle disconnect time:300 secondsLast input 00:00:02, output 00:00:00, output hang neverLast clearing of "show interface" counters neverInput queue:0/75/0/0 (size/max/drops/flushes); Total output drops:62360Queueing strategy:None30 second input rate 66000 bits/sec, 113 packets/sec30 second output rate 523000 bits/sec, 229 packets/sec1603630 packets input, 403845485 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort2680554 packets output, 518308502 bytes, 0 underruns0 output errors, 0 collisions, 4 interface resetsbuffer failures, 0 output buffers swapped outThe following show atm vc command output from a Cisco 2600 router displays information about an ATM virtual circuit:
Router# show atm vc
VCD / Peak Avg/Min BurstInterface Name VPI VCI Type Encaps SC Kbps Kbps Cells Sts0/0 1 0 201 PVC SNAP VBR 640 640 0 UPVC not configured on interface ATM0/1The following show atm vc command output from a Cisco 2600 router displays detailed information about a virtual circuit descriptor (VCD):
Router# show atm vc 1ATM0/0:VCD:1, VPI:0, VCI:201VBR-NRT, PeakRate:640, Average Rate:640, Burst Cells:0AAL5-LLC/SNAP, etype:0x0, Flags:0x2000820, VCmode:0x0OAM frequency:10 second(s)InARP frequency:15 minutes(s)InPkts:1606861, OutPkts:2682709, InBytes:404080341, OutBytes:519701804InPRoc:108900, OutPRoc:109133, Broadcasts:1InFast:1497961, OutFast:0, InAS:0, OutAS:0InPktDrops:0, OutPktDrops:64078/0/64078 (holdq/outputq/total)CrcErrors:0, SarTimeOuts:0, OverSizedSDUs:0, LengthViolation:0, CPIErrors:0OAM cells received:4765OAM cells sent:4767Status:UPVC 1 doesn't exist on interface ATM0/1Configuration Examples
This section provides the following configuration examples:
•Differentiated Data Services Example
Differentiated Data Services Example
Following is an example showing how CBWFQ, CAR, and WRED can be applied in the same configuration to provide differentiated services using QoS. The sample is from a Cisco 2600 router.
Building configuration...Current configuration :2603 bytes!version 12.2service timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname 2600-1!memory-size iomem 20!ip subnet-zero!ip cef!class-map match-all GOLDmatch access-group 1class-map match-all SILVERmatch access-group 2!policy-map GOLD-160-DATA-PACK-640class GOLDbandwidth 160random-detect dscp-basedrandom-detect exponential-weighting-constant 3random-detect dscp 16 2 4 10random-detect dscp 32 4 12 10class SILVERbandwidth 320random-detect dscp-basedrandom-detect exponential-weighting-constant 3random-detect dscp 0 30 60 10set ip dscp 0!interface ATM0/0no ip addressload-interval 30atm vc-per-vp 256no atm ilmi-keepalivedsl operating-mode auto!interface ATM0/0.1 point-to-pointip address 192.168.1.2 255.255.255.0pvc 0/201protocol ip 192.168.1.1 broadcastvbr-nrt 640 640tx-ring-limit 3service-policy output GOLD-160-DATA-PACK-640!interface Ethernet0/0ip address 1.3.214.9 255.255.0.0half-duplex!interface Ethernet0/1ip address 10.1.1.1 255.255.255.0rate-limit input access-group 1 160000 4470 4470 conform-action set-dscp-transmit 32 exceed-action continuerate-limit input access-group 1 80000 4470 4470 conform-action set-dscp-transmit 16 exceed-action drophalf-duplex!ip classlessip route 10.10.11.200 255.255.255.255 192.168.3.1ip route 223.255.254.254 255.255.255.255 1.3.0.1ip http server!access-list 1 permit 10.1.1.201access-list 2 permit 10.1.1.202access-list 3 permit 10.1.1.203access-list 100 permit udp any any precedence critical!snmp-server managercall rsvp-syncalias exec s sh runalias exec c conf t!line con 0exec-timeout 0 0privilege level 15line aux 0line vty 0 4loginline vty 5 15login!Verifying the Differentiated Data Services Configuration
The following show policy-map interface command output is for the LLQ, CAR, and WRED configuration.
Router# show policy-map interface atm0/0.1ATM0/0.1:VC 0/201 -Service-policy output:GOLD-160-DATA-PACK-640Class-map:GOLD (match-all)22738 packets, 34379856 bytes30 second offered rate 239000 bps, drop rate 50000 bpsMatch:access-group 1Weighted Fair QueueingOutput Queue:Conversation 73Bandwidth 160 (kbps)(pkts matched/bytes matched) 22738/34379856(depth/total drops/no-buffer drops) 4/4739/0exponential weight:3mean queue depth:4dscp Random drop Tail drop Minimum Maximum Markpkts/bytes pkts/bytes threshold threshold probabilityaf11 0/0 0/0 32 40 1/10af12 0/0 0/0 28 40 1/10af13 0/0 0/0 24 40 1/10af21 0/0 0/0 32 40 1/10af22 0/0 0/0 28 40 1/10af23 0/0 0/0 24 40 1/10af31 0/0 0/0 32 40 1/10af32 0/0 0/0 28 40 1/10af33 0/0 0/0 24 40 1/10af41 0/0 0/0 32 40 1/10af42 0/0 0/0 28 40 1/10af43 0/0 0/0 24 40 1/10cs1 0/0 0/0 22 40 1/10cs2 332/501984 3907/5907384 2 4 1/10cs3 0/0 0/0 26 40 1/10cs4 506/765072 0/0 4 12 1/10cs5 0/0 0/0 30 40 1/10cs6 0/0 0/0 32 40 1/10cs7 0/0 0/0 34 40 1/10ef 0/0 0/0 36 40 1/10rsvp 0/0 0/0 36 40 1/10default 0/0 0/0 20 40 1/10Class-map:SILVER (match-all)114748 packets, 173498976 bytes30 second offered rate 1212000 bps, drop rate 832000 bpsMatch:access-group 2Weighted Fair QueueingOutput Queue:Conversation 74Bandwidth 320 (kbps)(pkts matched/bytes matched) 115126/174070512(depth/total drops/no-buffer drops) 61/79012/0exponential weight:3mean queue depth:61dscp Random drop Tail drop Minimum Maximum Markpkts/bytes pkts/bytes threshold threshold probabilityaf11 0/0 0/0 32 40 1/10af12 0/0 0/0 28 40 1/10af13 0/0 0/0 24 40 1/10af21 0/0 0/0 32 40 1/10af22 0/0 0/0 28 40 1/10af23 0/0 0/0 24 40 1/10af31 0/0 0/0 32 40 1/10af32 0/0 0/0 28 40 1/10af33 0/0 0/0 24 40 1/10af41 0/0 0/0 32 40 1/10af42 0/0 0/0 28 40 1/10af43 0/0 0/0 24 40 1/10cs1 0/0 0/0 22 40 1/10cs2 0/0 0/0 24 40 1/10cs3 0/0 0/0 26 40 1/10cs4 0/0 0/0 28 40 1/10cs5 0/0 0/0 30 40 1/10cs6 0/0 0/0 32 40 1/10cs7 0/0 0/0 34 40 1/10ef 0/0 0/0 36 40 1/10rsvp 0/0 0/0 36 60 1/10default 9096/13753152 70065/105938280 30 60 1/10QoS Setip dscp 0Packets marked 115344Class-map:class-default (match-any)114747 packets, 173497464 bytes30 second offered rate 1212000 bps, drop rate 1209000 bpsMatch:anyThe following show interfaces command output is from a Cisco 2600 router:
Router# show interfaces e0/1 rate-limitEthernet0/1Inputmatches:access-group 1params: 160000 bps, 4470 limit, 4470 extended limitconformed 15673 packets, 23728922 bytes; action:set-dscp-transmit 32exceeded 102965 packets, 155889010 bytes; action:continuelast packet:0ms ago, current burst:4146 byteslast cleared 00:19:46 ago, conformed 160000 bps, exceeded 1051000 bpsmatches:access-group 1params: 80000 bps, 4470 limit, 4470 extended limitconformed 7836 packets, 11863704 bytes; action:set-dscp-transmit 16exceeded 95130 packets, 144026820 bytes; action:droplast packet:4ms ago, current burst:3708 byteslast cleared 00:19:46 ago, conformed 79000 bps, exceeded 971000 bpsThe following show interfaces atm command output is from a Cisco 2600 router:
Router# show interfaces atm0/0ATM0/0 is up, line protocol is upHardware is DSLSAR (with Alcatel ADSL Module)MTU 4470 bytes, sub MTU 4470, BW 800 Kbit, DLY 2560 usec,reliability 255/255, txload 181/255, rxload 1/255Encapsulation ATM, loopback not setEncapsulation(s):AAL5 AAL2, PVC mode23 maximum active VCs, 256 VCs per VP, 2 current VCCsVC idle disconnect time:300 secondsLast input 00:33:22, output 00:00:00, output hang neverLast clearing of "show interface" counters 00:20:09Input queue:0/75/0/0 (size/max/drops/flushes); Total output drops:208908Queueing strategy:None30 second input rate 0 bits/sec, 0 packets/sec30 second output rate 569000 bits/sec, 48 packets/sec0 packets input, 0 bytes, 0 no bufferReceived 0 broadcasts, 0 runts, 0 giants, 0 throttles0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort57315 packets output, 86075268 bytes, 0 underruns0 output errors, 0 collisions, 0 interface resets0 output buffer failures, 0 output buffers swapped outThe following show queue command output is from a Cisco 2600 router:
Router# show queue atm0/0Interface ATM0/0 VC 0/201Queueing strategy:weighted fairOutput queue:130/512/64/214301 (size/max total/threshold/drops)Conversations 3/3/64 (active/max active/max total)Reserved Conversations 2/2 (allocated/max allocated)Available Bandwidth 0 kilobits/sec(depth/weight/total drops/no-buffer drops/random/tail/interleaves) 5/228/5124/0/0/0/0Conversation 73, linktype:ip, length:1512source:10.1.1.201, destination:10.10.11.200, id:0x0000, ttl:59,TOS:128 prot:17, source port 100, destination port 100(depth/weight/total drops/no-buffer drops/random/tail/interleaves) 61/114/85189/0/9843/75346/0Conversation 74, linktype:ip, length:1512source:10.1.1.202, destination:10.10.11.200, id:0x0000, ttl:59,TOS:0 prot:17, source port 200, destination port 200(depth/weight/total drops/no-buffer drops/interleaves) 64/32384/123990/0/0Conversation 41, linktype:ip, length:1512source:10.1.1.203, destination:10.10.11.200, id:0x0000, ttl:59,TOS:0 prot:17, source port 300, destination port 300VoIP and Data Example
The following is sample output from a Cisco 2611 router. In this example, the customer premises equipment (CPE) is restricted to only a single PVC. Voice and data are sent over a single VC. The tx-ring-limit command and LLQ are used to give preferential treatment for voice traffic.
Building configuration...Current configuration :1861 bytes!version 12.2service timestamps debug uptimeservice timestamps log uptimeno service password-encryption!hostname CPE-2611-1!voice-card 1dspfarm!ip subnet-zero!ip cef!class-map match-all VOICEmatch access-group 100!policy-map VOICE-160-DATA-480-PACKclass VOICEpriority 160class class-defaultbandwidth 320!controller T1 1/0framing esflinecode b8zsds0-group 0 timeslots 1-24 type e&m-wink-start!controller T1 1/1framing sflinecode ami!interface ATM0/0no ip addressload-interval 30atm vc-per-vp 256no atm ilmi-keepalivedsl operating-mode auto!interface ATM0/0.1 point-to-pointip address 192.168.1.2 255.255.255.0pvc 0/201protocol ip 192.168.1.1 broadcastvbr-nrt 640 640tx-ring-limit 3service-policy output VOICE-160-DATA-480-PACK!interface Ethernet0/0ip address 1.3.214.51 255.255.0.0half-duplex!interface ATM0/1no ip addressshutdownatm vc-per-vp 256no atm ilmi-keepaliveatm voice aal2 aggregate-svc upspeed-number 0dsl equipment-type CPEdsl operating-mode GSHDSL symmetric annex Adsl linerate AUTO!interface Ethernet0/1ip address 10.1.1.1 255.255.255.0half-duplex!ip classlessip route 223.255.254.254 255.255.255.255 1.3.0.1ip http server!access-list 100 permit udp any any precedence critical!snmp-server managercall rsvp-sync!voice-port 1/0:0!mgcp profile default!dial-peer cor custom!dial-peer voice 1 potsdestination-pattern 7...port 1/0:0!dial-peer voice 2 voipdestination-pattern 8...session target ipv4:192.168.3.1ip qos dscp cs5 mediaip qos dscp cs5 signalingno vad!alias exec s sh runalias exec c conf t!line con 0exec-timeout 0 0privilege level 15line aux 0line vty 0 4loginline vty 5 15loginCommand Reference
There are no new or modified commands associated with the voice and QoS features in Cisco IOS Release 12.2(2)XK.