Customer is testing OAM CFM between ACX7100 and MX304. Noticed that MX304 detects the neighbor, but ACX7K does not. Same is the issue between ACX7K to ACX7K. Topo: ACX--ae0-------ae0--MX ACX: set chassis aggregated-devices ethernet device-count 20 set interfaces et-0/0/32 ether-options ethernet-switch-profile tag-protocol-id 0x88a8 set interfaces et-0/0/32 ether-options no-flow-control set interfaces et-0/0/32 ether-options 802.3ad ae0 set interfaces et-0/0/34 ether-options ethernet-switch-profile tag-protocol-id 0x88a8 set interfaces et-0/0/34 ether-options no-flow-control set interfaces et-0/0/34 ether-options 802.3ad ae0 set interfaces ae0 flexible-vlan-tagging set interfaces ae0 mtu 9192 set interfaces ae0 encapsulation flexible-ethernet-services set interfaces ae0 aggregated-ether-options minimum-links 1 set interfaces ae0 aggregated-ether-options link-speed 400g set interfaces ae0 aggregated-ether-options lacp passive set interfaces ae0 aggregated-ether-options lacp periodic fast set interfaces ae0 unit 500 description "Switch Management VLAN 500" set interfaces ae0 unit 500 encapsulation vlan-bridge set interfaces ae0 unit 500 vlan-id 500 set protocols oam ethernet connectivity-fault-management performance-monitoring hardware-assisted-timestamping set protocols oam ethernet connectivity-fault-management performance-monitoring delegate-server-processing set protocols oam ethernet connectivity-fault-management performance-monitoring hardware-assisted-keepalives enable set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK level 5 set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 continuity-check interval 1s set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 mep 1 interface ae0.500 set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 mep 1 direction down set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 mep 1 auto-discovery User@ACX7100-1> show oam ethernet connectivity-fault-management interfaces Interface Link Status Level MEP Neighbours Identifier ae0.500 Up Active 5 1 0 User@ACX7100-1> show oam ethernet connectivity-fault-management mep-database maintenance-association 1 local-mep 1 maintenance-domain CFM_CHECK Maintenance domain name: CFM_CHECK, Format: string, Level: 5 Maintenance association name: 1, Format: string Continuity-check status: enabled, Interval: 1s, Loss-threshold: 3 frames MEP identifier: 1, Direction: down, MAC address: 3c:08:cd:8b:cb:82 Auto-discovery: enabled, Priority: 0 Interface status TLV: none, Port status TLV: none Chassis ID: 3c:08:cd:8b:cd:aa Management Address: 10.237.164.100 Sendid TLV: no Interface name: ae0.500, Interface status: Active, Link status: Up Defects: Remote MEP not receiving CCM : no Erroneous CCM received : no Cross-connect CCM received : no RDI sent by some MEP : no Some remote MEP's MAC in error state : no Alarm Indication Signal state : no Statistics: CCMs sent : 0 CCMs received out of sequence : 0 LBMs sent : 0 Valid in-order LBRs received : 0 Valid out-of-order LBRs received : 0 LBRs received with corrupted data : 0 LBRs sent : 0 LTMs sent : 0 LTMs received : 0 LTRs sent : 0 LTRs received : 0 Sequence number of next LTM request : 29290542 1DMs sent : 0 Valid 1DMs received : 0 Invalid 1DMs received : 0 Out of sync 1DMs received : 0 DMMs sent : 0 Valid DMMs received : 0 Invalid DMMs received : 0 DMRs sent : 0 Valid DMRs received : 0 Invalid DMRs received : 0 LMMs sent : 0 Valid LMMs received : 0 Invalid LMMs received : 0 LMRs sent : 0 Valid LMRs received : 0 Invalid LMRs received : 0 SLMs sent : 0 Valid SLMs received : 0 Invalid SLMs received : 0 SLRs sent : 0 Valid SLRs received : 0 Invalid SLRs received : 0 Valid AISs generated : 0 Valid AISs received : 0 User@ACX7100-1> show version Hostname: ACX7100-1 Model: ACX7100-32C Junos: 23.4R2-S3.10-EVO Yocto: 3.0.2 Linux Kernel: 5.2.60-yocto-standard-g85baac8 JUNOS-EVO OS 64-bit [junos-evo-install-acx-f-x86-64-23.4R2-S3.10-EVO] MX: set chassis aggregated-devices ethernet device-count 30 set interfaces et-0/0/8 gigether-options 802.3ad ae0 set interfaces et-0/1/8 description acx7100-1:et-0/0/32 set interfaces et-0/1/8 gigether-options 802.3ad ae0 set interfaces ae0 hierarchical-scheduler set interfaces ae0 flexible-vlan-tagging set interfaces ae0 mtu 9192 set interfaces ae0 encapsulation flexible-ethernet-services set interfaces ae0 aggregated-ether-options minimum-links 1 set interfaces ae0 aggregated-ether-options link-speed 400g set interfaces ae0 aggregated-ether-options lacp active set interfaces ae0 unit 500 description acx7100-1:ae0 set interfaces ae0 unit 500 vlan-id 500 set interfaces ae0 unit 500 family inet address 35.248.48.13/30 set protocols oam ethernet connectivity-fault-management performance-monitoring hardware-assisted-timestamping set protocols oam ethernet connectivity-fault-management performance-monitoring delegate-server-processing set protocols oam ethernet connectivity-fault-management performance-monitoring hardware-assisted-keepalives enable set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK level 5 set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 continuity-check interval 1s set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 mep 2 interface ae0.500 set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 mep 2 direction down set protocols oam ethernet connectivity-fault-management maintenance-domain CFM_CHECK maintenance-association 1 mep 2 auto-discovery {master} User@MX304> show oam ethernet connectivity-fault-management interfaces Interface Link Status Level MEP Neighbours Identifier ae0.500 Up Active 5 2 1 {master} User@MX304> show lldp neighbors Local Interface Parent Interface Chassis Id Port info System Name et-0/1/8 ae0 3c:08:cd:8b:cb:82 et-0/0/32 ACX7100-1.test.intranet et-0/0/8 ae0 3c:08:cd:8b:cb:82 et-0/0/34 ACX7100-1.es1.test.intranet {master} User@MX304> show oam ethernet connectivity-fault-management mep-database maintenance-association 1 local-mep 2 maintenance-domain CFM_CHECK Maintenance domain name: CFM_CHECK, Format: string, Level: 5 Maintenance association name: 1, Format: string Continuity-check status: enabled, Interval: 1s, Loss-threshold: 3 frames MEP identifier: 2, Direction: down, MAC address: 60:c7:8d:eb:61:e0 Auto-discovery: enabled, Priority: 0 Interface status TLV: none, Port status TLV: none Chassis ID: 60:c7:8d:eb:62:12 Management Address: 10.237.167.249 Sendid TLV: no Interface name: ae0.500, Interface status: Active, Link status: Up Defects: Remote MEP not receiving CCM : no Erroneous CCM received : no Cross-connect CCM received : no RDI sent by some MEP : no Some remote MEP's MAC in error state : no Alarm Indication Signal state : no Statistics: CCMs sent : 181124 CCMs received out of sequence : 0 LBMs sent : 0 Valid in-order LBRs received : 0 Valid out-of-order LBRs received : 0 LBRs received with corrupted data : 0 LBRs sent : 0 LTMs sent : 0 LTMs received : 0 LTRs sent : 0 LTRs received : 0 Sequence number of next LTM request : 871687238 1DMs sent : 0 Valid 1DMs received : 0 Invalid 1DMs received : 0 Out of sync 1DMs received : 0 DMMs sent : 0 Valid DMMs received : 0 Invalid DMMs received : 0 DMRs sent : 0 Valid DMRs received : 0 Invalid DMRs received : 0 LMMs sent : 0 Valid LMMs received : 0 Invalid LMMs received : 0 LMRs sent : 0 Valid LMRs received : 0 Invalid LMRs received : 0 SLMs sent : 0 Valid SLMs received : 0 Invalid SLMs received : 0 SLRs sent : 0 Valid SLRs received : 0 Invalid SLRs received : 0 Valid AISs generated : 0 Valid AISs received : 0 Remote MEP count: 1 Identifier MAC address State Interface 1 3c:08:cd:8b:cb:82 ok ae0.500 {master}
Neighbours are always 0 via CLI:Please run the following command to detect the issue: User@ACX7100-1> show oam ethernet connectivity-fault-management interfaces Interface Link Status Level MEP Neighbours Identifier ae0.500 Up Active 5 1 0 >>>>>>>>>>>>>> Neighbours is zero.
The issue is fixed via PR1870180.
The following release contains the fix for this PR:
evo:23.4R2-S5-EVO
evo:24.4R2-EVO
evo:25.2R1-EVO
evo:25.3R1-EVO
Following command was collected after installing one of the fixed releases:
User@ACX7100-1> show version Junos: 24.4R2-EVO User@ACX7100-1> show oam ethernet connectivity-fault-management interfaces Interface Link Status Level MEP Neighbours Identifier ae0.500 Up Active 5 1 1 et-0/0/30.501 Up Active 5 1 1
2025-03-29 : Article Created
2025-04-15: Article modified, listed all resolved in versions in the Solution section.