Symptom
* CUBE (on 4431/51) for Direct routing with MS and was on IOS 17.08.01a on ISR 4451, with no issues.
* Upgraded 4451/31 to 17.09.01a, we started noticing ?%SIP-5-DIALPEER_STATUS? marked as ?Busied Out? and then ?UP? within a fraction of seconds and raising SNMP alerts constantly for their dail-peers as followed.
* When they revert back IOS to 17.08.01a, they have no alerts on ?%SIP-5-DIALPEER_STATUS? marked as ?Busied Out? and then ?UP?.
Example log :
Line 392: 10288749: Sep 8 04:02:56 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 393: 10288750: Sep 8 04:02:56 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 419: 10288775: Sep 8 04:02:56 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Up, Raising SNMP UP Trap
Line 1588: 10289793: Sep 8 04:02:56 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 1589: 10289794: Sep 8 04:02:56 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 1615: 10289819: Sep 8 04:02:56 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Up, Raising SNMP UP Trap
Line 2791: 10290804: Sep 8 04:02:59 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 2792: 10290805: Sep 8 04:02:59 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 2818: 10290830: Sep 8 04:02:59 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Up, Raising SNMP UP Trap
Line 5190: 10292881: Sep 8 04:03:01 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 5191: 10292882: Sep 8 04:03:01 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Busied Out, Raising SNMP DOWN Trap
Line 5217: 10292907: Sep 8 04:03:01 SGT: %SIP-5-DIALPEER_STATUS: VoIP dial-Peer is Up, Raising SNMP UP Trap
Conditions
* Only noticed, after upgrading the router to 17.09.01a, if you revert back to 17.08.01a, no issues noticed.
Workaround
Revert back from 17.09.1 to 17.08.01a
Further Problem Description
Apparently this is causing false alerts by raising SNMP alerts, but the dial-peers seems to be working with no issues.
