2020/06/04 00:38:09 VCS NOTICE V-16-1-10464 Requesting snapshot from node: 1
2020/06/04 00:38:09 VCS NOTICE V-16-1-10465 Getting snapshot.  snapped_membership: 0x3 current_membership: 0x3 current_jeopardy_membership: 0x0

Cause: Due to difference in MTU size of LLT interface snapshot sending will not work when cluster joins the interconnect

2020/06/04 00:38:09 VCS NOTICE V-16-1-10464 Requesting snapshot from node: 1
2020/06/04 00:38:09 VCS NOTICE V-16-1-10465 Getting snapshot.  snapped_membership: 0x3 current_membership: 0x3 current_jeopardy_membership: 0x0

Sample LLT configuration over UDP 

cat etc/llttab
set-node xxxxxxxx
set-cluster xxxxx

# Private MNHB over UDP
link team0.2655 udp - udp 51200 - xxx.xxx.x.xxx xxx.xxx.x.xxx

# Public MNHB over UDP
link-lowpri team0.410 udp - udp 51204 - xxx.xxx.x.xxx xxx.xxx.x.xxx

NiC MTU on node 0

ifconfig -a | egrep -i 'team0.410|team0.2655'
team0.410: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
team0.2655: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

NIC MTU on node 1

ifconfig -a | egrep -i 'team0.410|team0.2655'
team0.410: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
team0.2655: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000

Solution : Reconfigure LLT with the interface having the same MTU sizes or if UDP is not required configure the interface with traditional method of using mac address.

Modifying LLT can be done as below

The procedure shown in the diagram can be used for any type of change to the VCS communications configuration. The first task includes saving and closing the cluster configuration before backing up and editing files.
Although some types of modifications do not require you to stop both GAB and LLT, using this procedure ensures that any type of change you make takes effect.