Example for Configuring Single-ended SLM in a VLAN

Networking Requirements

As networks rapidly develop, 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-multipoint network shown in Figure 1, PE1 and PE2 are connected through a VLAN. A carrier wants to collect accurate performance statistics about LM on the link between CE1 and CE2. To monitor network performance in real time, the carrier can configure single-ended SLM on the VLAN. This configuration allows the carrier to immediately adjust the network in case of voice quality deterioration.

Figure 1 Single-ended SLM in VLAN networking

Configuration Roadmap

The configuration roadmap is as follows:

Configure on-demand single-ended SLM on the link between CEs to periodically detect and count packet loss ratios.
Configure proactive single-ended SLM on the link between CEs to continuously detect and count packet loss ratios.

Procedure

Configure on-demand single-ended SLM.

Configure basic Ethernet connectivity fault management (CFM) functions and set the maintenance association end point (MEP) type to outward.

Configure basic Ethernet CFM functions on each CE. Specify the Ethernet CFM protocol as IEEE Standard 802.1ag-2007. Create an MD named md3 and an MA named ma3, and bind the MA to the VLAN.

# Configure CE1.

<HUAWEI> system-view
[HUAWEI] sysname CE1
[CE1] vlan batch 2
[CE1] interface gigabitethernet 0/0/1
[CE1-GigabitEthernet0/0/1] port link-type trunk
[CE1-GigabitEthernet0/0/1] port trunk allow-pass vlan 2
[CE1-GigabitEthernet0/0/1] quit
[CE1] set service-mode enhanced
Warning: This command will effect forward performance. Continue? [Y/N]:y
[CE1] cfm enable
[CE1] cfm version standard
[CE1] cfm md md3
[CE1-md-md3] ma ma3
[CE1-md-md3-ma-ma3] map vlan 2
[CE1-md-md3-ma-ma3] mep mep-id 3 interface gigabitethernet 0/0/1 outward
[CE1-md-md3-ma-ma3] mep ccm-send mep-id 3 enable
[CE1-md-md3-ma-ma3] remote-mep mep-id 4
[CE1-md-md3-ma-ma3] remote-mep ccm-receive mep-id 4 enable
[CE1-md-md3-ma-ma3] test-id 1 mep 3 remote-mep 4

# Configure CE2.

<HUAWEI> system-view
[HUAWEI] sysname CE2
[CE2] vlan batch 2
[CE2] interface gigabitethernet 0/0/1
[CE2-GigabitEthernet0/0/1] port link-type trunk
[CE2-GigabitEthernet0/0/1] port trunk allow-pass vlan 2
[CE2-GigabitEthernet0/0/1] quit
[CE2] set service-mode enhanced
Warning: This command will effect forward performance. Continue? [Y/N]:y
[CE2] cfm enable
[CE2] cfm version standard
[CE2] cfm md md3
[CE2-md-md3] ma ma3
[CE2-md-md3-ma-ma3] map vlan 2
[CE2-md-md3-ma-ma3] mep mep-id 4 interface gigabitethernet 0/0/1 outward
[CE2-md-md3-ma-ma3] mep ccm-send mep-id 4 enable
[CE2-md-md3-ma-ma3] remote-mep mep-id 3
[CE2-md-md3-ma-ma3] remote-mep ccm-receive mep-id 3 enable
[CE2-md-md3-ma-ma3] test-id 1 mep 4 remote-mep 3

Enable CE2 to receive SLM frames.

[CE2-md-md3-ma-ma3] loss-measure single-ended-synthetic receive test-id 1 time-out 300
[CE2-md-md3-ma-ma3] quit
[CE2-md-md3] quit

Configure on-demand single-ended SLM on CE1.

[CE1-md-md3-ma-ma3] loss-measure single-ended-synthetic send test-id 1 interval 1000 sending-count 10 time-out 2
[CE1-md-md3-ma-ma3] quit
[CE1-md-md3] quit

Verify the configuration.

# Run the display y1731 statistic-type command on CE1 to view statistics about on-demand single-ended SLM.

[CE1] display y1731 statistic-type single-synthetic-loss test-id 1
Measurement Start Time : 2017-07-29 13:22:49
--------------------------------------------------------------------------------
Index       L-send R-send L-recv Unack  L-loss R-loss L-loss-ratio R-loss-ratio
--------------------------------------------------------------------------------
1           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 proactive single-ended SLM.

Configure proactive single-ended SLM on CE1.

[CE1] cfm md md3
[CE1-md-md3] ma ma3
[CE1-md-md3-ma-ma3] loss-measure single-ended-synthetic continual send test-id 1 interval 1000
[CE1-md-md3-ma-ma3] quit
[CE1-md-md3] quit

Verify the configuration.

# Run the display y1731 statistic-type command on CE1 to view statistics about proactive single-ended SLM.

[CE1] 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
--------------------------------------------------------------------------------
1           10     10     10     0           0      0      0.0000%      0.0000%
2           10     10     10     0           0      0      0.0000%      0.0000%
3           10     10     10     0           0      0      0.0000%      0.0000%
4           10     10     10     0           0      0      0.0000%      0.0000%
5           10     10     10     0           0      0      0.0000%      0.0000%
6           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

CE1 configuration file

#
sysname CE1
#
vlan batch 2
#
cfm enable
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 2
#
cfm md md3
 ma ma3
  map vlan 2
  mep mep-id 3 interface GigabitEthernet0/0/1 outward
  mep ccm-send mep-id 3 enable
  remote-mep mep-id 4
  remote-mep ccm-receive mep-id 4 enable
  test-id 1 mep 3 remote-mep 4
  loss-measure single-ended-synthetic continual send test-id 1 interval 1000 
#
return

CE2 configuration file

#
sysname CE2
#
vlan batch 2
#
cfm enable
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 2
#
cfm md md3
 ma ma3
  map vlan 2
  mep mep-id 4 interface GigabitEthernet0/0/1 outward
  mep ccm-send mep-id 4 enable
  remote-mep mep-id 3
  remote-mep ccm-receive mep-id 3 enable
  test-id 1 mep 4 remote-mep 3
  loss-measure single-ended-synthetic receive test-id 1
#
return