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Docsis CMTS SNMP traps issue

 

 

Hi all ,

 

If anyone can help me ( maybe with config issue ) 

 

When cable modem goes offline / online i get this messages 

This is happening whit any type of modem .

Does someone using traps on CMTS , any working config example ?

 

Cable modem goes offline


Dec 19 14:41:23.327: SNMP: V1 Trap, ent ciscoDocsExtMIB.2, addr xx.xx.xx.xx, gentrap 6, spectrap 1
 docsIfCmtsCmStatusEntry.2.4475717 = H{&65
 docsIfCmtsCmStatusEntry.3.4475717 = 10.5.5.87
 docsIfCmtsCmStatusEntry.4.4475717 = 0
 docsIfCmtsCmStatusEntry.5.4475717 = 8113
 cdxCmCpeEntry.5.6.200.251.38.182.53.157 = 2885
 cdxCmtsCmStatusExtEntry.1.4475717 = 1
Dec 19 14:41:23.339: SNMP: Queuing packet to xx.xx.xx.xx
Dec 19 14:41:23.339: SNMP: V1 Trap, ent ciscoDocsExtMIB.2, addr xx.xx.xx.xx, gentrap 6, spectrap 1
 docsIfCmtsCmStatusEntry.2.4475717 = H{&65
 docsIfCmtsCmStatusEntry.3.4475717 = 10.5.5.87
 docsIfCmtsCmStatusEntry.4.4475717 = 0
 docsIfCmtsCmStatusEntry.5.4475717 = 8113
 cdxCmCpeEntry.5.6.200.251.38.182.53.157 = 2885
 cdxCmtsCmStatusExtEntry.1.4475717 = 1
Dec 19 14:41:23.379: SNMP: Packet sent via UDP to xx.xx.xx.xx
Dec 19 14:41:23.379: SNMP: Queuing packet to xx.xx.xx.xx
 

Cable modem comes online


Dec 19 14:41:42.340: SNMP: V1 Trap, ent ciscoDocsExtMIB.2, addr xx.xx.xx.xx, gentrap 6, spectrap 1
 docsIfCmtsCmStatusEntry.2.4475717 = H{&65
 docsIfCmtsCmStatusEntry.3.4475717 = 10.5.5.87
 docsIfCmtsCmStatusEntry.4.4475717 = 0
 docsIfCmtsCmStatusEntry.5.4475717 = 8113
 cdxCmCpeEntry.5.6.200.251.38.182.53.157 = 2885
 cdxCmtsCmStatusExtEntry.1.4475717 = 12
Dec 19 14:41:42.352: SNMP: Queuing packet to xx.xx.xx.xx
Dec 19 14:41:42.352: SNMP: V1 Trap, ent ciscoDocsExtMIB.2, addr xx.xx.xx.xx, gentrap 6, spectrap 1
 docsIfCmtsCmStatusEntry.2.4475717 = H{&65
 docsIfCmtsCmStatusEntry.3.4475717 = 10.5.5.87
 docsIfCmtsCmStatusEntry.4.4475717 = 0
 docsIfCmtsCmStatusEntry.5.4475717 = 8113
 cdxCmCpeEntry.5.6.200.251.38.182.53.157 = 2885
 cdxCmtsCmStatusExtEntry.1.4475717 = 12
Dec 19 14:41:42.592: SNMP: Packet sent via UDP to xx.xx.xx.xx

bg-b45-c-1#scm 10.5.5.87
                                                                                 D
MAC Address    IP Address     I/F           MAC           Prim RxPwr  Timing Num I
                                            State         Sid  (dBmv) Offset CPE P
c8fb.26b6.359d 10.5.5.87      C5/1/3/U0     online(pt)    2885!-2.00  823    0   N

Otherwise, normally it should be like this

Dec 19 14:42:36.836: SNMP: V1 Trap, ent ciscoDocsExtMIB.2, addr 89.216.7.28, gentrap 6, spectrap 1
 docsIfCmtsCmStatusEntry.2.4478568 = C8 FB 26 F8 D6 28 
 docsIfCmtsCmStatusEntry.3.4478568 = 10.5.26.57
 docsIfCmtsCmStatusEntry.4.4478568 = 0
 docsIfCmtsCmStatusEntry.5.4478568 = 0
 cdxCmCpeEntry.5.6.200.251.38.248.214.40 = 5736
 cdxCmtsCmStatusExtEntry.1.4478568 = 12
Dec 19 14:42:36.848: SNMP: Queuing packet to xx.xx.xx.xx

 

Second problem is that CMTS is not sending all trap messages when cable modem goes offline

What we lack are the messages that the modem goes offline (which are more importantly), and as far as online reaches 99% of messages. Something  that we observed is that for example in the first 10  modems that we reset CMTS send traps for three only (not consecutive).After ten messsage CMTS send all of them  (the test is usually reset the modem 20-30). There is not any connection about the type of modem that sends the trap.

Suspicion fell on PRE card but the tests were tried on various  (2 CMTS with pre2, 2 CMTS  with pre4 and 1 CMTS pre5). and  different IOS from the SCF3 - SCH1.

 

Config is :

 

interface Cable3/0
 cable enable-trap cmonoff-notification
 cable enable-trap cmonoff-interval 60

snmp-server trap-source Loopback0
snmp-server enable traps cable cm-onoff
snmp-server host xx.xx.xx.xx public-cmts
snmp-server host xx.xx.xx.xx public-cmts

 

 

Thanks 

VZ

 

 

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