we have two gateways in same domain and almost 250 servers pointed to both the gateways... It was running fine previously from some days we are getting health service heart beat failure alert and then all the servers are getting greyed out including the gateway, in a particular time of a day, in daily basis. We have checked all the things and found all are fine like in network no issues, We have updated the hotfix recommended by MS, we have excluded the AV scan in the gateways. It seems that the problem is with few of the agents because we tested pointing all the servers to one gateway and we found the other gateway healthy and very next day we load balanced the gateways and found both are greyed out. We did not found any specific event log error. Only one event was flooding the opsmgr event log that is event id 21042. Can anyone please suggest any thing which may resolve this issue!!!! Thanks in advance, Onkar Onkar Ghosh

Hi If the gateway is also greyed out, you might want to check the management server that the gateways are connecting to - I have seen high cpu usage on the management server cause the gateways to grey out. It is almost certainly a connectivity issue of somekind - but it sounds more like gateway <--> MS rather than gateway <--> agent. Cheers Graham Regards Graham New System Center 2012 Blog! - http://www.systemcentersolutions.co.uk View OpsMgr tips and tricks at http://systemcentersolutions.wordpress.com/

Hello Graham, Thanks for the quick response.. If there is a issue with the Management server then both the gateways should be greyed out at that particular time every day. But maximum days only one gateway got inactive(greyed out) while the other one was working absolutely fine(healthy). I don't think that the issue is with MS. It must be the issue with some particular agents which are affecting the gateway to which they are mapped, can you please suggest any way to find out those agents or there activity, because at the time of issue we are not getting any events in gateway and MS event log for identifying the root cause. Any idea is welcome. Thanks, OnkarOnkar Ghosh

Please check the issue with the methods for Scenario 3 in the following Knowledge Base article: Troubleshooting gray agent states in System Center Operations Manager http://support.microsoft.com/kb/2288515 Thanks.Nicholas Li TechNet Community Support

Please check the issue with the methods for Scenario 3 in the following Knowledge Base article: Troubleshooting gray agent states in System Center Operations Manager http://support.microsoft.com/kb/2288515 Thanks.Nicholas Li TechNet Community Support

Hi Onkar If the gateway is greying out (heartbeat failure \ computer not contactable alerts) then it is very unlikely that it is anything to do with the agents. They shouldn't affect gateway health in that way. Once the gateway is grey, all agents behind it will grey out as well. I'd concentrate on the gateway itself and see if you can correlate "down" with performance issues, especially CPU. I'd also look at the MS - I've seen precisely this on a customer site recently where it was high CPU on the MS that was causing the gateway to grey out. I appreciate what you say about only one of the gateways greying out but I still wouldn't rule out performance issues here. Are the Management Servers dedicated to the gateways or are they monitoring network devices \ windows agents \ unix agents as well? Cheers Graham Regards Graham New System Center 2012 Blog! - http://www.systemcentersolutions.co.uk View OpsMgr tips and tricks at http://systemcentersolutions.wordpress.com/

Hi Onkar If the gateway is greying out (heartbeat failure \ computer not contactable alerts) then it is very unlikely that it is anything to do with the agents. They shouldn't affect gateway health in that way. Once the gateway is grey, all agents behind it will grey out as well. I'd concentrate on the gateway itself and see if you can correlate "down" with performance issues, especially CPU. I'd also look at the MS - I've seen precisely this on a customer site recently where it was high CPU on the MS that was causing the gateway to grey out. I appreciate what you say about only one of the gateways greying out but I still wouldn't rule out performance issues here. Are the Management Servers dedicated to the gateways or are they monitoring network devices \ windows agents \ unix agents as well? Cheers Graham Regards Graham New System Center 2012 Blog! - http://www.systemcentersolutions.co.uk View OpsMgr tips and tricks at http://systemcentersolutions.wordpress.com/