Cisco CDN (Alarm 550001 (SEKeepalive) SE keepalive timed-out )

[Long Jin]

Dear Cisco Experts,

My systems as below:

CDSM, SR: version 3.2.1

SE1: version 3.2.1

SE2: version 2.6.3

Status (all devices): online (from CDSM: cms connectivity from all devices are OK)

SE1 can work normally, but SE2 doesn't work, Alarm:"SE SE2 keepalive timed-out" from CDSM.

log from SR:

192.168.11.0/24 20 SE2 (Down, Static)

192.168.8.0/24 20 SE1 (Operational, Static) (Load 1%, Device Threshold not reached)

0.0.0.0/0 10 SE1 (Operational, Static) (Load 1%, Device Threshold not reached)

0.0.0.0/0 10 SE2 (Down, Static)

I found infor from cisco about this alarm:

Alarm 550001 (SEKeepalive) SE keepalive timed-out or SE is not reachable.

Explanation    Either the SR has not received keepalives from the SE, or the SE is not reachable.

Recommended Action    Check the cables connected to the network device and the SE.

I'm sure about network connectivy is OK, problem should be from Version mismatch between SE and SR, Could you help me for this?

Many thanks and rgds.

[Yijie Xie]

Hi Long,

The alarm message that you are querying is indicating the keepalive between SR and SE has timed out.

There is UDP based keepalive messages sent from each SE to all SR periodically, by default it is 2 seconds. It is configurable via CDSM GUI. The destination port is 2323. This message has SE load information inside.

To check the keepalive message, you can execute following command on SR

SR# tcpdump udp port 2323

To debug keepalive, you can enable

SR#debug service-router keepalive

Then check service router errorlog under /local1

SR#type-tail errorlog/service_monitor_errorlog.current follow

check any error message popup. quit by Ctrl+C, then undebug all

SR#undebug all

Between 2.6.3 and 3.2.1, there is major difference in the format of packet. We do not recommend you to mix the version in production network. If you are requesting urgent assistance because of the service impact by this alarm, please do contact Cisco TAC support.

Best Regards,

Richard Xie

[Long Jin]

Dear Richard,

Many thanks for your reply.

I'll try to debug for checking keepalive message as your advices.

Best Rgds.