Example for Configuring Single-ended SLM in EVPN Networking
This section provides an example for configuring single-ended synthetic loss measurement (SLM) in EVPN networking.
Networking Requirements
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. Therefore, performance monitoring is especially important for service transmission channels.
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 EVPN 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.
Configure single-ended proactive SLM.
Data Preparation
To complete the configuration, you need the following data:
Layer 2 virtual circuit (L2VC) ID for configuring basic EVPN functions
Names of the MD and MA between PE1 and PE2 and between CE1 and PE1
Procedure
- Configure single-ended on-demand SLM for AC-side links.
Configure an EVPN connection.
Configure an EVPN connection between PE1 and PE2. The configuration details are not provided here. For details, see the EVPN Configuration or configuration files in this configuration example.
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 EVPN instance.
# Configure PE1.
[~PE1] cfm enable [*PE1] cfm version standard [*PE1] cfm md md1 [*PE1-md-md1] ma ma1 [*PE1-md-md1-ma-ma1] map evpn vpn-instance evpna [*PE1-md-md1-ma-ma1] mep mep-id 1 interface gigabitethernet0/1/1 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.
[~PE2] cfm enable [*PE2] cfm version standard [*PE2] cfm md md1 [*PE2-md-md1] ma ma1 [*PE2-md-md1-ma-ma1] map evpn vpn-instance evpna [*PE2-md-md1-ma-ma1] mep mep-id 2 interface gigabitethernet0/1/1 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 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 # cfm enable # evpn vpn-instance evpna route-distinguisher 100:1 vpn-target 1:1 export-extcommunity vpn-target 1:1 import-extcommunity # mpls lsr-id 1.1.1.1 # mpls # mpls ldp # ipv4-family # interface GigabitEthernet0/1/1 undo shutdown evpn binding vpn-instance evpna # interface GigabitEthernet0/1/2 undo shutdown ip address 10.1.1.1 255.255.255.0 mpls mpls ldp # interface LoopBack0 ip address 1.1.1.1 255.255.255.255 # bgp 100 peer 2.2.2.2 as-number 100 peer 2.2.2.2 connect-interface LoopBack0 # ipv4-family unicast undo synchronization peer 2.2.2.2 enable # l2vpn-family evpn peer 2.2.2.2 enable # ospf 1 area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 10.1.1.0 0.0.0.255 # evpn source-address 1.1.1.1 # cfm md md1 ma ma1 map evpn vpn-instance evpna mep mep-id 1 interface GigabitEthernet0/1/1 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 loss-measure single-ended-synthetic continual send test-id 1 interval 1000 # return
PE2 configuration file
# sysname PE2 # cfm enable # evpn vpn-instance evpna route-distinguisher 200:1 vpn-target 1:1 export-extcommunity vpn-target 1:1 import-extcommunity # mpls lsr-id 2.2.2.2 # mpls # mpls ldp # ipv4-family # interface GigabitEthernet0/1/1 undo shutdown evpn binding vpn-instance evpna # interface GigabitEthernet0/1/2 undo shutdown ip address 10.2.1.1 255.255.255.0 mpls mpls ldp # interface LoopBack0 ip address 2.2.2.2 255.255.255.255 # bgp 100 peer 1.1.1.1 as-number 100 peer 1.1.1.1 connect-interface LoopBack0 # ipv4-family unicast undo synchronization peer 1.1.1.1 enable # l2vpn-family evpn peer 1.1.1.1 enable # ospf 1 area 0.0.0.0 network 2.2.2.2 0.0.0.0 network 10.2.1.0 0.0.0.255 # evpn source-address 2.2.2.2 # cfm md md1 ma ma1 map evpn vpn-instance evpna mep mep-id 2 interface GigabitEthernet0/1/1 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 remote-mep 1 loss-measure single-ended-synthetic receive test-id 1 time-out 300 # return