Interface Status on access via HTTPS and Clish

[Di_Junior]

Dear Check Mates

I need your urgent help.

We are experiencing something very strange on our environment.

1. We have a cluster operating in Load sharing mode (unicast), when I run the cphaprob state command it shows that the sync interface of one member is down, but when I access the member via HTTPs, in the Network interfaces sections, it shows that the sync interface is up. Any thoughts as to what could be causing this problem?

[Kaspars_Zibarts]

That means that gateways are not "seeing" each others packets in Sync interface. Sounds like you are connected to a switch so check that trunk between switches includes VLAN where Sync ports are connected to.

You can run 

 tcpdump -nni Sync port 8116 -e -c 20

and observer that you see packets originating from both gateways 

listening on Sync, link-type EN10MB (Ethernet), capture size 96 bytes
21:44:10.959901 00:00:00:00:01:00 > 01:00:5e:28:fe:fa, ethertype IPv4 (0x0800), length 1330: 0.0.0.0.8116 > 192.168.254.0.8116: UDP, length 1288
21:44:10.974141 00:00:00:00:01:01 > 01:00:5e:28:fe:fa, ethertype IPv4 (0x0800), length 82: 0.0.0.0.8116 > 192.168.254.0.8116: UDP, length 40
21:44:10.974212 00:00:00:00:01:01 > 01:00:5e:28:fe:fa, ethertype IPv4 (0x0800), length 82: 0.0.0.0.8116 > 192.168.254.0.8116: UDP, length 40
21:44:10.978944 00:00:00:00:01:00 > 01:00:5e:28:fe:fa, ethertype IPv4 (0x0800), length 76: 0.0.0.0.8116 > 192.168.254.0.8116: UDP, length 34

[Ray_Lal]

Check the Switches that the gateways are connected to - Are they running IGMP snooping globally, or perhaps for the VLAN's hosted on the gateways?

If so, preferably disable IGMP Snooping, or change CCP to Broadcast instead of multi-cast - Personally, I would keep it MC, to reduce unnecessary chatter.

Please list output for 'cpstat -f all ha' and cphaprob -i list and fw ctl pstat.