Example for Configuring Two-Way Frame Delay Measurement in VLL Networking
This section provides an example showing how to configure two-way frame delay measurement in VLL networking.
Networking Requirements
With the increasing popularization and wide application of the Internet, various value-added services such as Internet Protocol television (IPTV), video conferencing, and Voice over Internet Protocol (VoIP) services are widely deployed. Link connectivity and network performance determine the quality of services (QoS) on bearer networks. Therefore, performance monitoring is especially important for service transmission channels.
As shown in Figure 1, connectivity fault management (CFM) is configured between each customer edge (CE) and provider edge (PE) and between PEs. To provide high-quality video services, providers hope to monitor the bidirectional delay over mobile bearer links in real time, while monitoring link connectivity. Monitoring the bidirectional delay over mobile bearer links allows the providers to respond quickly to video service quality deterioration.
Configuration Roadmap
Configure on-demand two-way frame delay measurement for a PW between the PEs to periodically collect statistics about the delay in frame transmission.
Configure proactive two-way frame delay measurement for a PW between the PEs to continuously collect statistics about the delay in frame transmission.
Data Preparation
To complete the configuration, you need the following data:
ID of an L2VC of a VLL between PE1 and PE2.
Names of the maintenance domain (MD) and maintenance association (MA) between PE1 and PE2 and between CE1 and PE1.
ID of an L2VC of a VLL between PE1 and PE2.
Interval at which delay measurement messages (DMMs) are sent and the number of times when on-demand DMMs are sent.
Procedure
- Configure on-demand two-way frame delay measurement for a PW between PEs.
Configure a VLL connection.
Configure a VLL connection between PE1 and PE2. The configuration details are not provided here. For details, see the chapter "VLL Configuration" in the HUAWEI NetEngine 8000 F Series Router Configuration Guide - VPN or configuration files in this configuration example.
After completing the configuration, run the display mpls l2vc command on each PE to view information about the VC and AC.
[~PE1] display mpls l2vc total LDP VC : 1 1 up 0 down *client interface : Gigabitethernet0/1/1.1 Administrator PW : no session state : up AC status : up VC state : up Label state : 0 Token state : 0 VC ID : 1001 VC type : GigabitEthernet destination : 2.2.2.2 local VC label : 16 remote VC label : 16 control word : disable remote control word : disable forwarding entry : exist local group ID : 0 remote group ID : 0 local AC OAM State : up local PSN OAM State : up local forwarding state : forwarding local status code : 0x0 remote AC OAM state : up remote PSN OAM state : up remote forwarding state: forwarding remote status code : 0x0 ignore standby state : no BFD for PW : unavailable VCCV State : up manual fault : not set active state : active OAM Protocol : -- OAM Status : -- OAM Fault Type : -- PW APS ID : -- PW APS Status : -- TTL Value : 1 link state : up local VC MTU : 1500 remote VC MTU : 1500 local VCCV : alert ttl lsp-ping bfd remote VCCV : alert ttl lsp-ping bfd tunnel policy name : -- traffic behavior name : -- PW template name : -- primary or secondary : primary load balance type : flow Access-port : false Switchover Flag : false VC tunnel info : 1 tunnels NO.0 TNL type : ldp , TNL ID : 0x0000000001004c4e42 create time : 4 days, 15 hours, 59 minutes, 12 seconds up time : 0 days, 15 hours, 23 minutes, 17 seconds last change time : 0 days, 15 hours, 23 minutes, 17 seconds VC last up time : 2012/07/24 09:37:33 VC total up time : 4 days, 15 hours, 57 minutes, 50 seconds CKey : 1 NKey : 436207716 PW redundancy mode : frr AdminPw interface : -- AdminPw link state : -- Forward state : send inactive, receive inactive Diffserv Mode : uniform Service Class : -- Color : -- DomainId : -- Domain Name : --
Configure basic GigabitEthernet CFM functions and specify the MEP type as inward.
Configure basic GigabitEthernet CFM functions on each PE. Specify the GigabitEthernet CFM protocol in the version of IEEE Standard 802.1ag-2007. Create an MD named md1 and an MA named ma1, and bind the MA to the VLL.
# Configure PE1.
<HUAWEI> system-view [~HUAWEI] sysname PE1 [*HUAWEI] commit [~PE1] cfm enable [*PE1] commit [~PE1] cfm md md1 [*PE1-md-md1] ma ma1 [*PE1-md-md1-ma-ma1] map mpls l2vc 1001 tagged [*PE1-md-md1-ma-ma1] mep mep-id 1 interface gigabitethernet0/1/1.1 inward [*PE1-md-md1-ma-ma1] mep ccm-send mep-id 1 enable [*PE1-md-md1-ma-ma1] remote-mep mep-id 2 [*PE1-md-md1-ma-ma1] remote-mep ccm-receive mep-id 2 enable [*PE1-md-md1-ma-ma1] test-id 1 mep 1 remote-mep 2 [*PE1-md-md1-ma-ma1] commit
# Configure PE2.
<HUAWEI> system-view [~HUAWEI] sysname PE2 [*HUAWEI] commit [~PE2] cfm enable [*PE2] commit [~PE2] cfm md md1 [*PE2-md-md1] ma ma1 [*PE2-md-md1-ma-ma1] map mpls l2vc 1001 tagged [*PE2-md-md1-ma-ma1] mep mep-id 2 interface gigabitethernet0/1/1.1 inward [*PE2-md-md1-ma-ma1] mep ccm-send mep-id 2 enable [*PE2-md-md1-ma-ma1] remote-mep mep-id 1 [*PE2-md-md1-ma-ma1] remote-mep ccm-receive mep-id 1 enable [*PE2-md-md1-ma-ma1] test-id 1 mep 2 [*PE2-md-md1-ma-ma1] commit
Configure the DMM reception function on PE2.
# Configure PE2.
[*PE2-md-md1-ma-ma1] delay-measure two-way receive test-id 1 [*PE2-md-md1-ma-ma1] quit [*PE2-md-md1] quit [*PE2] commit
Enable on-demand two-way frame delay measurement for a PW on the VLL network.
# Configure PE1.
[*PE1-md-md1-ma-ma1] delay-measure two-way send test-id 1 interval 1000 count 20 [*PE1-md-md1-ma-ma1] quit [*PE1-md-md1] quit [*PE1] commit
Verify the configuration.
Run the display y1731 statistic-type command on PE1 to view the statistics about the delay in bidirectional frame transmission.
[~PE1] display y1731 statistic-type twoway-delay Latest two-way delay statistics of test-id 1: -------------------------------------------------------------------------------- Index Delay(usec) Delay variation(usec) -------------------------------------------------------------------------------- 1 422 - 2 320 102 3 467 147 4 309 158 5 328 19 6 316 12 7 336 20 8 282 54 9 421 139 10 287 134 11 322 35 12 446 124 13 275 171 14 291 16 15 341 50 -------------------------------------------------------------------------------- Average delay(usec) : 344 Average delay variation(usec) : 84 Maximum delay(usec) : 467 Maximum delay variation(usec) : 171 Minimum delay(usec) : 275 Minimum delay variation(usec) : 12
- Configure proactive two-way frame delay measurement for a PW.
Proactive two-way frame delay measurement can be configured to continuously monitor the performance of a PW.
Configure the test instance.
# Configure PE1
[~PE1] cfm md md1 [*PE1-md-md1] ma ma1 [*PE1-md-md1-ma-ma1] test-id 2 mep 1 [*PE1-md-md1-ma-ma1] delay-measure two-way receive test-id 2 [*PE1-md-md1-ma-ma1] quit [*PE1-md-md1] quit [*PE1] commit
# Configure PE2
[~PE2] cfm md md1 [*PE2-md-md1] ma ma1 [*PE2-md-md1-ma-ma1] test-id 2 mep 2 remote-mep 1 [*PE2-md-md1-ma-ma1] quit [*PE2-md-md1] quit [*PE2] commit
Enable proactive two-way frame delay measurement.
# Configure PE2.
[~PE2] cfm md md1 [*PE2-md-md1] ma ma1 [*PE2-md-md1-ma-ma1] test-id 2 mep 2 remote-mep 1 [*PE2-md-md1-ma-ma1] delay-measure two-way continual send test-id 2 interval 30000 [*PE2-md-md1-ma-ma1] quit [*PE2-md-md1] quit [*PE2] commit
Verify the configuration.
Run the display y1731 statistic-type command on PE2 to view the statistics about the delay in bidirectional frame transmission.
[~PE2] display y1731 statistic-type twoway-delay Latest two-way delay statistics of test-id 2: -------------------------------------------------------------------------------- Index Delay(usec) Delay variation(usec) -------------------------------------------------------------------------------- 1 322 - 2 430 108 -------------------------------------------------------------------------------- Average delay(usec) : 376 Average delay variation(usec) : 108 Maximum delay(usec) : 430 Maximum delay variation(usec) : 108 Minimum delay(usec) : 322 Minimum delay variation(usec) : 108
Configuration Files
PE1 configuration file
# sysname PE1 # cfm enable # mpls lsr-id 1.1.1.1 mpls # mpls l2vpn # mpls ldp # interface GigabitEthernet0/1/1.1 vlan-type dot1q 1 mpls l2vc 2.2.2.2 1001 # interface GigabitEthernet0/1/2 undo shutdown ip address 192.168.1.1 255.255.255.0 mpls mpls ldp # interface LoopBack0 ip address 1.1.1.1 255.255.255.0 # ospf 1 area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 192.168.1.0 0.0.0.255 # cfm md md1 ma ma1 map mpls l2vc 1001 tagged mep mep-id 1 interface GigabitEthernet0/1/1.1 inward mep ccm-send mep-id 1 enable remote-mep mep-id 2 remote-mep ccm-receive mep-id 2 enable test-id 1 mep 1 remote-mep 2 test-id 2 mep 1 delay-measure two-way receive test-id 2 # return
PE2 configuration file
# sysname PE2 # cfm enable # mpls lsr-id 2.2.2.2 mpls # mpls l2vpn # mpls ldp # interface GigabitEthernet0/1/1.1 vlan-type dot1q 1 mpls l2vc 1.1.1.1 1001 # interface GigabitEthernet0/1/2 undo shutdown ip address 192.168.1.2 255.255.255.0 mpls mpls ldp # interface LoopBack0 ip address 2.2.2.2 255.255.255.0 # ospf 1 area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 192.168.1.0 0.0.0.255 # cfm md md1 ma ma1 map mpls l2vc 1001 tagged mep mep-id 2 interface GigabitEthernet0/1/1.1 inward mep ccm-send mep-id 2 enable remote-mep mep-id 1 remote-mep ccm-receive mep-id 1 enable test-id 1 mep 2 delay-measure two-way receive test-id 1 test-id 2 mep 2 remote-mep 1 delay-measure two-way continual send test-id 2 interval 30000 # return