Why vBond still send hello packets?

[moonsg1124]

hi guys, 

i'm new to sd-wan and there is a trouble with my study

I know once vEdge onboarding at vSmart,vManage, the connection will be lose with vBond.

but when I check my control connection. there is a vBond with system ip 0.0.0.0 also the hello packet exchange in in progress.
i checked it show control connections detail -peer vBond

someone says it's disconnected(0.0.0.0). but if so why they still exchange hello packet??

[svemulap@cisco.com]

Hi Moonsg1124 -

If your question is why hellos are sent to vBond - it is to make sure the heartbeat is there with the vBond.
This is expected and is different from establishing and tearing down the DTLS connection.

HTH

[moonsg1124 · Accepted solution]

thank you and kind regards.

why does the "show control connections" command still show vbond when dtls is enable?

[svemulap@cisco.com · Accepted solution]

If the max-control-connections is not honored, [v/c]Edge device keeps trying.
Default is 2. If you have only one vSmart in the lab set up, you can manually over-ride max-control==1
This way,[v/c]Edge device doesn't keep trying to form control w/ vBond.

HTH.

p.s: please give helpful votes/accepted solution, if it answers your question.