Example for Configuring Single-ended SLM in VLL Networking
This section provides an example for configuring single-ended synthetic loss measurement (SLM) in virtual leased line (VLL) networking.
Context
As networks rapidly develop and applications diversify, various value-added services, such as Internet Protocol television (IPTV), video conferencing, and Voice over Internet Protocol (VoIP), are more widely used than ever before. Any link connectivity fault or network performance deterioration directly affects service quality on a live network, making performance monitoring on the pipes that transmit these services absolutely essential.
On the point-to-point network shown in Figure 1, a carrier wants to collect accurate performance statistics about LM on the link between PE1 and PE2. To monitor network performance in real time, the carrier can configure single-ended SLM on the VLL network. This configuration allows the carrier to immediately adjust the network in case of voice quality deterioration.
Configuration Roadmap
Configure single-ended on-demand SLM on a PW between provider edges (PEs).
Configure single-ended proactive SLM on a PW between PEs.
Data Preparation
To complete the configuration, you need the following data:
Layer 2 virtual circuit (L2VC) ID
Names of the maintenance domain (MD) and maintenance association (MA) in which CE1, PE1, and PE2 reside
Procedure
- Configure single-ended on-demand SLM on a PW between PEs.
Establish a VLL.
Establish a VLL between PE1 and PE2. For configuration details, see "VLL Configuration" in Configuration Guide - VPN or Configuration Files in this section.
After the preceding configuration is complete, run the display mpls l2vc command on each PE to view VC and attachment circuit (AC) information. The following example uses the command output on PE1.
[~PE1] display mpls l2vc Total LDP VC : 1 1 up 0 down *client interface : Eth-Trunk2.1 is up Administrator PW : no session state : up AC status : up VC state : up Label state : 0 Token state : 0 VC ID : 10001 VC type : VLAN destination : 10.1.1.25 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 : 0 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 : -- PW template name : -- primary or secondary : primary load balance type : flow Access-port : false Switchover Flag : false VC tunnel/token info : 1 tunnels/tokens NO.0 TNL type : lsp , TNL ID : 0x203 Backup TNL type : lsp , TNL ID : 0x0 create time : 2 days, 21 hours, 33 minutes, 37 seconds up time : 0 days, 4 hours, 20 minutes, 19 seconds last change time : 0 days, 4 hours, 20 minutes, 19 seconds VC last up time : 2013/04/15 10:04:26 VC total up time : 2 days, 21 hours, 25 minutes, 20 seconds CKey : 6 NKey : 3 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 Ethernet connectivity fault management (CFM) functions and set the maintenance association end point (MEP) type to inward.
Configure basic Ethernet CFM functions on each PE. Specify the Ethernet CFM protocol as IEEE Standard 802.1ag-2007. Create an MD named md1 and an MA named ma1, and bind the MA to the VLL.
# Configure PE1.
[~PE1] cfm enable [*PE1] cfm version standard [*PE1] cfm md md1 [*PE1-md-md1] ma ma1 [*PE1-md-md1-ma-ma1] map mpls l2vc 2 tagged [*PE1-md-md1-ma-ma1] mep mep-id 1 interface Eth-Trunk2.1 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.
[~PE2] cfm enable [*PE2] cfm version standard [*PE2] cfm md md1 [*PE2-md-md1] ma ma1 [*PE2-md-md1-ma-ma1] map mpls l2vc 2 tagged [*PE2-md-md1-ma-ma1] mep mep-id 2 interface Eth-Trunk2.1 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 remote-mep 1 [*PE2-md-md1-ma-ma1] commit
Enable PE2 to receive SLM frames.
# Configure PE2.
[~PE2-md-md1-ma-ma1] loss-measure single-ended-synthetic receive test-id 1 time-out 300 [*PE2-md-md1-ma-ma1] commit [~PE2-md-md1-ma-ma1] quit [~PE2-md-md1] quit
Enable PE1 to send SLM frames.
# Configure PE1.
[~PE1-md-md1-ma-ma1] loss-measure single-ended-synthetic send test-id 1 interval 1000 sending-count 10 time-out 2 [*PE1-md-md1-ma-ma1] commit [~PE1-md-md1-ma-ma1] quit [~PE1-md-md1] quit
Verify the configuration.
Run the display y1731 statistic-type command on PE1 to view statistics about single-ended on-demand SLM.
[~PE1]display y1731 statistic-type single-synthetic-loss test-id 1 -------------------------------------------------------------------------------- Index L-send R-send L-recv Unack L-loss R-loss L-loss-ratio R-loss-ratio -------------------------------------------------------------------------------- 1016 10 10 10 0 0 0 0.0000% 0.0000% -------------------------------------------------------------------------------- Average Local-loss : 0 Average Local-loss Ratio : 0.0000% Maximum Local-loss : 0 Maximum Local-loss Ratio : 0.0000% Minimum Local-loss : 0 Minimum Local-loss Ratio : 0.0000% Average Remote-loss : 0 Average Remote-loss Ratio : 0.0000% Maximum Remote-loss : 0 Maximum Remote-loss Ratio : 0.0000% Minimum Remote-loss : 0 Minimum Remote-loss Ratio : 0.0000%
- Configure single-ended proactive SLM on a PW between PEs.
Enable PE2 to receive SLM frames.
# Configure PE2.
[~PE2] cfm md md1 [~PE2-md-md1] ma ma1 [~PE2-md-md-ma-ma1] loss-measure single-ended-synthetic receive test-id 1 time-out 300 [*PE2-md-md-ma-ma1] commit [~PE2-md-md1-ma-ma1] quit [~PE2-md-md1] quit
Enable PE1 to send SLM frames.
# Configure PE1.
[~PE1] cfm md md1 [~PE1-md-md1] ma ma1 [~PE1-md-md1-ma-ma1] loss-measure single-ended-synthetic continual send test-id 1 interval 1000 [*PE2-md-md-ma-ma1] commit [~PE1-md-md1-ma-ma1] quit [~PE1-md-md1] quit
Verify the configuration.
Run the display y1731 statistic-type command on PE1 to view statistics about single-ended proactive SLM.
[~PE1] display y1731 statistic-type single-synthetic-loss test-id 1 -------------------------------------------------------------------------------- Index L-send R-send L-recv Unack L-loss R-loss L-loss-ratio R-loss-ratio -------------------------------------------------------------------------------- 1016 10 10 10 0 0 0 0.0000% 0.0000% 1017 10 10 10 0 0 0 0.0000% 0.0000% 1018 10 10 10 0 0 0 0.0000% 0.0000% 1019 10 10 10 0 0 0 0.0000% 0.0000% 1020 10 10 10 0 0 0 0.0000% 0.0000% 1021 10 10 10 0 0 0 0.0000% 0.0000% -------------------------------------------------------------------------------- Average Local-loss : 0 Average Local-loss Ratio : 0.0000% Maximum Local-loss : 0 Maximum Local-loss Ratio : 0.0000% Minimum Local-loss : 0 Minimum Local-loss Ratio : 0.0000% Average Remote-loss : 0 Average Remote-loss Ratio : 0.0000% Maximum Remote-loss : 0 Maximum Remote-loss Ratio : 0.0000% Minimum Remote-loss : 0 Minimum Remote-loss Ratio : 0.0000%
Configuration Files
PE1 configuration file
# sysname PE1 # FTP server enable # y1731 pm-mode enable cfm enable # mpls lsr-id 10.1.1.24 mpls # mpls l2vpn # mpls ldp # interface Eth-Trunk2 # interface Eth-Trunk2.1 vlan-type dot1q 1 mpls l2vc 10.1.1.25 10001 # interface GigabitEthernet0/1/1 undo shutdown eth-trunk 2 # interface GigabitEthernet0/1/2 undo shutdown ip address 192.168.1.3 255.255.255.0 mpls mpls ldp # interface LoopBack0 ip address 10.1.1.24 255.255.255.255 # ospf 1 opaque-capability enable area 0.0.0.1 network 10.1.1.1 0.0.0.0 network 10.1.1.24 0.0.0.0 network 2.2.2.2 0.0.0.0 network 10.1.1.0 0.0.0.255 network 192.168.1.0 0.0.0.255 network 192.168.2.0 0.0.0.255 # cfm md md1 ma ma1 map mpls l2vc 2 tagged mep mep-id 1 interface Eth-Trunk2.1 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 loss-measure single-ended-synthetic continual send test-id 1 interval 1000 # return
PE2 configuration file
# sysname PE2 # cfm enable # mpls lsr-id 10.1.1.25 mpls # mpls l2vpn # mpls ldp # interface Eth-Trunk2 # interface Eth-Trunk2.1 vlan-type dot1q 1 mpls l2vc 10.1.1.24 10001 # interface GigabitEthernet0/1/1 undo shutdown eth-trunk 2 # interface GigabitEthernet0/1/2 undo shutdown ip address 192.168.1.4 255.255.255.0 mpls mpls ldp # interface NULL0 # interface LoopBack0 ip address 10.1.1.25 255.255.255.255 # ospf 1 opaque-capability enable area 0.0.0.1 network 10.1.1.25 0.0.0.0 network 2.2.2.2 0.0.0.0 network 10.1.1.0 0.0.0.255 network 10.1.1.1 0.0.0.255 network 192.168.1.0 0.0.0.255 network 192.168.2.0 0.0.0.255 # cfm md md1 ma ma1 map mpls l2vc 2 tagged mep mep-id 2 interface Eth-Trunk2.1 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 remote-mep 1 loss-measure single-ended-synthetic receive test-id 1 time-out 300 # return