LLDP discovery with MikroTik devices doesn’t work right now out of the box. From a first investigation, it seems like parts of the LLDP MIB are not fully implemented and Enhanced-Linked shows an error message LLDP_MIB not supported. The LLDP topology in his example is extremely simple:
An SNMP walk shows the following output from these devices:
router-1:
snmpwalk -v 2c -c public 172.16.8.25 1.0.8802.1.1.2.1
(Unknown Module)::iso.0.8802.1.1.2.1.3.4.0 = String: MikroTik RouterOS 6.48.4 (stable) CHR
(Unknown Module)::iso.0.8802.1.1.2.1.3.5.0 = String: (
(Unknown Module)::iso.0.8802.1.1.2.1.3.6.0 = String:
(Unknown Module)::iso.0.8802.1.1.2.1.3.7.1.2.1 = Integer: 3
(Unknown Module)::iso.0.8802.1.1.2.1.3.7.1.3.1 = String: 00:0C:29:0F:D9:BD
(Unknown Module)::iso.0.8802.1.1.2.1.3.7.1.4.1 = String: ether1
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.4.0.0.1 = Integer: 4
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.5.0.0.1 = String: 00:0C:29:AD:3C:FD
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.6.0.0.1 = Integer: 5
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.7.0.0.1 = String: ether1
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.9.0.0.1 = String: router-2
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.10.0.0.1 = String:
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.11.0.0.1 = String: .
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.12.0.0.1 = String: .
(Unknown Module)::iso.0.8802.1.1.2.1.4.2.1.1.0.0.1 = Integer: 1
(Unknown Module)::iso.0.8802.1.1.2.1.4.2.1.2.0.0.1 = String: 172.16.8.26
router-2:
snmpwalk -v 2c -c public 172.16.8.26 1.0.8802.1.1.2.1
Enhanced-Linkd debug output:emphasized text
(Unknown Module)::iso.0.8802.1.1.2.1.3.4.0 = String: MikroTik RouterOS 6.48.4 (stable) CHR
(Unknown Module)::iso.0.8802.1.1.2.1.3.5.0 = String: (
(Unknown Module)::iso.0.8802.1.1.2.1.3.6.0 = String:
(Unknown Module)::iso.0.8802.1.1.2.1.3.7.1.2.1 = Integer: 3
(Unknown Module)::iso.0.8802.1.1.2.1.3.7.1.3.1 = String: 00:0C:29:AD:3C:FD
(Unknown Module)::iso.0.8802.1.1.2.1.3.7.1.4.1 = String: ether1
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.4.0.0.1 = Integer: 4
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.5.0.0.1 = String: 00:0C:29:0F:D9:BD
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.6.0.0.1 = Integer: 5
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.7.0.0.1 = String: ether1
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.9.0.0.1 = String: router-1
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.10.0.0.1 = String:
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.11.0.0.1 = String: .
(Unknown Module)::iso.0.8802.1.1.2.1.4.1.1.12.0.0.1 = String: .
(Unknown Module)::iso.0.8802.1.1.2.1.4.2.1.1.0.0.1 = Integer: 1
(Unknown Module)::iso.0.8802.1.1.2.1.4.2.1.2.0.0.1 = String: 172.16.8.25
2021-09-28 11:34:02,054 INFO [Main] o.o.n.d.AbstractSpringContextJmxServiceDaemon: enlinkd starting.
2021-09-28 11:34:02,054 DEBUG [Main] o.o.n.d.AbstractSpringContextJmxServiceDaemon: SPRING: thread.classLoader=java.net.FactoryURLClassLoader@7106e68e
2021-09-28 11:34:02,054 INFO [Main] o.o.n.d.AbstractServiceDaemon: enlinkd starting.
2021-09-28 11:34:02,062 INFO [Main] o.o.n.s.LegacyScheduler: start: scheduler started
2021-09-28 11:34:02,062 INFO [Main] o.o.n.d.AbstractServiceDaemon: enlinkd started.
2021-09-28 11:34:02,062 DEBUG [Main] o.o.n.d.AbstractSpringContextJmxServiceDaemon: SPRING: context.classLoader= java.net.FactoryURLClassLoader@7106e68e
2021-09-28 11:34:02,062 INFO [Main] o.o.n.d.AbstractSpringContextJmxServiceDaemon: enlinkd starting complete.
2021-09-28 11:34:02,070 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: scheduler running
2021-09-28 11:34:02,075 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.NodesOnmsTopologyUpdater@78f1 (ready in 0ms)
2021-09-28 11:34:02,095 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=1, taskCount=1, completedTaskCount=0, completedRatio=0.000, poolSize=1
2021-09-28 11:34:02,095 INFO [EnhancedLinkd-Thread-1-of-5] o.o.n.e.c.Discovery: run: running NodesTopologyUpdater initial:0 interval:30000
2021-09-28 11:34:02,095 DEBUG [EnhancedLinkd-Thread-1-of-5] o.o.n.e.c.TopologyUpdater: run: start NodesTopologyUpdater
2021-09-28 11:34:02,095 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.UserDefinedLinkTopologyUpdater@78f1 (ready in 0ms)
2021-09-28 11:34:02,121 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=2, taskCount=2, completedTaskCount=0, completedRatio=0.000, poolSize=2
2021-09-28 11:34:02,121 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.LldpOnmsTopologyUpdater@78f1 (ready in 0ms)
2021-09-28 11:34:02,125 INFO [EnhancedLinkd-Thread-2-of-5] o.o.n.e.c.Discovery: run: running org.opennms.netmgt.enlinkd.UserDefinedLinkTopologyUpdater initial:0 interval:30000
2021-09-28 11:34:02,126 DEBUG [EnhancedLinkd-Thread-2-of-5] o.o.n.e.c.TopologyUpdater: run: start org.opennms.netmgt.enlinkd.UserDefinedLinkTopologyUpdater
2021-09-28 11:34:02,148 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=3, taskCount=3, completedTaskCount=0, completedRatio=0.000, poolSize=3
2021-09-28 11:34:02,149 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.NodeDiscoveryLldp@4be1a3c3 (ready in 0ms)
2021-09-28 11:34:02,152 INFO [EnhancedLinkd-Thread-3-of-5] o.o.n.e.c.Discovery: run: running LldpTopologyUpdater initial:0 interval:30000
2021-09-28 11:34:02,152 DEBUG [EnhancedLinkd-Thread-3-of-5] o.o.n.e.c.TopologyUpdater: run: start LldpTopologyUpdater
2021-09-28 11:34:02,155 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=4, taskCount=4, completedTaskCount=0, completedRatio=0.000, poolSize=4
2021-09-28 11:34:02,156 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.NodeDiscoveryLldp@4be1a3e1 (ready in 0ms)
2021-09-28 11:34:02,156 INFO [EnhancedLinkd-Thread-4-of-5] o.o.n.e.c.Discovery: run: running NodeDiscoveryLldp node:[15] ip:172.16.8.26NodeDiscoveryLldp initial:3000 interval:86400000
2021-09-28 11:34:02,158 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=5, taskCount=5, completedTaskCount=0, completedRatio=0.000, poolSize=5
2021-09-28 11:34:02,158 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.NodeDiscoveryLldp@607a4c72 (ready in 0ms)
2021-09-28 11:34:02,159 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=5, taskCount=6, completedTaskCount=0, completedRatio=0.000, poolSize=5
2021-09-28 11:34:02,159 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: found ready runnable org.opennms.netmgt.enlinkd.NodeDiscoveryLldp@1ed199f8 (ready in 0ms)
2021-09-28 11:34:02,159 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: thread pool statistics: activeCount=5, taskCount=7, completedTaskCount=0, completedRatio=0.000, poolSize=5
2021-09-28 11:34:02,160 DEBUG [java.util.concurrent.ThreadPoolExecutor@32b4edea[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0]] o.o.n.s.LegacyScheduler: run: no ready runnables scheduled, waiting...
2021-09-28 11:34:02,160 INFO [EnhancedLinkd-Thread-5-of-5] o.o.n.e.c.Discovery: run: running NodeDiscoveryLldp node:[16] ip:172.16.8.25NodeDiscoveryLldp initial:3000 interval:86400000
2021-09-28 11:34:02,968 DEBUG [EnhancedLinkd-Thread-4-of-5] o.o.n.s.s.Snmp4JWalker: Walking lldpLocalGroup for /172.16.8.26 using version SNMPv2c with config: SnmpAgentConfig[Address: 172.16.8.26, ProxyForAddress: null, Port: 161, Timeout: 1800, Retries: 1, MaxVarsPerPdu: 10, MaxRepetitions: 2, MaxRequestSize: 65535, Version: v2c, TTL: null, ReadCommunity: XXXXXXXX, WriteCommunity: XXXXXXXX]
2021-09-28 11:34:02,967 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.s.Snmp4JWalker: Walking lldpLocalGroup for /172.16.8.25 using version SNMPv2c with config: SnmpAgentConfig[Address: 172.16.8.25, ProxyForAddress: null, Port: 161, Timeout: 1800, Retries: 1, MaxVarsPerPdu: 10, MaxRepetitions: 2, MaxRequestSize: 65535, Version: v2c, TTL: null, ReadCommunity: XXXXXXXX, WriteCommunity: XXXXXXXX]
2021-09-28 11:34:02,987 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.SingleInstanceTracker: Requesting oid following: .1.0.8802.1.1.2.1.3.1
2021-09-28 11:34:02,991 DEBUG [EnhancedLinkd-Thread-4-of-5] o.o.n.s.SingleInstanceTracker: Requesting oid following: .1.0.8802.1.1.2.1.3.1
2021-09-28 11:34:03,007 DEBUG [EnhancedLinkd-Thread-4-of-5] o.o.n.s.SingleInstanceTracker: Requesting oid following: .1.0.8802.1.1.2.1.3.2
2021-09-28 11:34:03,007 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.SingleInstanceTracker: Requesting oid following: .1.0.8802.1.1.2.1.3.2
2021-09-28 11:34:03,007 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.SingleInstanceTracker: Requesting oid following: .1.0.8802.1.1.2.1.3.3
2021-09-28 11:34:03,007 DEBUG [EnhancedLinkd-Thread-4-of-5] o.o.n.s.SingleInstanceTracker: Requesting oid following: .1.0.8802.1.1.2.1.3.3
2021-09-28 11:34:03,037 DEBUG [EnhancedLinkd-Thread-4-of-5] o.o.n.s.s.Snmp4JWalker: Sending tracker pdu of size 3
2021-09-28 11:34:03,047 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.s.Snmp4JWalker: Sending tracker pdu of size 3
2021-09-28 11:34:03,181 DEBUG [EnhancedLinkd-Thread-5-of-5] o.s.Snmp: Running pending async request with handle PduHandle[551514536] and retry count left 1
2021-09-28 11:34:03,182 DEBUG [EnhancedLinkd-Thread-4-of-5] o.s.Snmp: Running pending async request with handle PduHandle[2132499397] and retry count left 1
2021-09-28 11:34:03,478 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.s.Snmp: Looking up pending request with handle PduHandle[551514536]
2021-09-28 11:34:03,478 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.s.Snmp: Looking up pending request with handle PduHandle[2132499397]
2021-09-28 11:34:03,494 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.s.Snmp: Cancelling pending request with handle PduHandle[551514536]
2021-09-28 11:34:03,502 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.s.Snmp4JWalker: Received a tracker PDU of type RESPONSE from /172.16.8.25 of size 3, errorStatus = 0, errorStatusText = Success, errorIndex = 0
2021-09-28 11:34:03,507 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.s.Snmp: Cancelling pending request with handle PduHandle[2132499397]
2021-09-28 11:34:03,509 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.s.Snmp4JWalker: Received a tracker PDU of type RESPONSE from /172.16.8.26 of size 3, errorStatus = 0, errorStatusText = Success, errorIndex = 0
2021-09-28 11:34:03,625 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SingleInstanceTracker: Processing varBind: .1.0.8802.1.1.2.1.3.3.0 = router-2
2021-09-28 11:34:03,625 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SingleInstanceTracker: Processing varBind: .1.0.8802.1.1.2.1.3.3.0 = router-1
2021-09-28 11:34:03,626 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SingleInstanceTracker: Processing varBind: .1.0.8802.1.1.2.1.3.3.0 = router-1
2021-09-28 11:34:03,627 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SingleInstanceTracker: Processing varBind: .1.0.8802.1.1.2.1.3.3.0 = router-2
2021-09-28 11:34:03,627 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SingleInstanceTracker: Processing varBind: .1.0.8802.1.1.2.1.3.3.0 = router-1
2021-09-28 11:34:03,627 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SingleInstanceTracker: Processing varBind: .1.0.8802.1.1.2.1.3.3.0 = router-2
2021-09-28 11:34:03,690 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SnmpStore: Storing Result: alias: lldpLocSysName [.1.0.8802.1.1.2.1.3.3].[0] = STRING: router-1 (726f757465722d31)
2021-09-28 11:34:03,690 DEBUG [DefaultUDPTransportMapping_0.0.0.0/0] o.o.n.s.SnmpStore: Storing Result: alias: lldpLocSysName [.1.0.8802.1.1.2.1.3.3].[0] = STRING: router-2 (726f757465722d32)
2021-09-28 11:34:03,692 INFO [EnhancedLinkd-Thread-5-of-5] o.o.n.e.NodeDiscoveryLldp: run: node[16]: LLDP_MIB not supported
2021-09-28 11:34:03,693 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.LegacyScheduler: schedule: Adding ready runnable org.opennms.netmgt.enlinkd.NodeDiscoveryLldp@4be1a3e1 (ready in 86399999ms) at interval 86400000
2021-09-28 11:34:03,694 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.LegacyScheduler: schedule: interval queue did not exist, a new one has been created
2021-09-28 11:34:03,694 DEBUG [EnhancedLinkd-Thread-5-of-5] o.o.n.s.LegacyScheduler: schedule: queue element added, calling notify all since none were scheduled
2021-09-28 11:34:03,697 INFO [EnhancedLinkd-Thread-4-of-5] o.o.n.e.NodeDiscoveryLldp: run: node[15]: LLDP_MIB not supported