developer recommends to have skill based configuration for such kind of setup. I tested with skill setup and it worked fine.
Please the below lab test using skill based setting.
I used only one EP port 2601 and we have VDN 2016 configured on application page.
Call flow on CM side
Call 1 : 2016(VDN)==vector 3skill 10==agent 2043 logged into vp station 2056 answers the call
Call 2 : 2016(VDN)==vector 3skill 10== no EP agent available to take call so the call get routed to another VDN 354 as configured on vector step.(attached is the lab configuration)
Below is the list trace
CALL 1
====================
list trace vector 3
LIST TRACE
time vec st data
11:51:46 0 0 ENTERING TRACE cid 329
11:51:46 3 1 vdn e2016 bsr appl 0 strategy 1st-found override n
11:51:46 3 1 wait 2 secs hearing ringback
11:51:48 3 2 goto step 3 if available in skill 10 >= 1
11:51:48 3 3 queue-to
11:51:48 3 3 queueing to skill 10 pri m
11:51:48 3 3 Local Agent Preference=n
11:51:48 3 3 Agent Login ID: 2043 Logged in at station: 2601
11:51:48 3 3 LEAVING VECTOR PROCESSING cid 329
11:51:48 3 3 TRACE COMPLETE cid 329
CALL 2
============
list trace vector 3
LIST TRACE
time vec st data
11:52:09 0 0 ENTERING TRACE cid 330
11:52:09 3 1 vdn e2016 bsr appl 0 strategy 1st-found override n
11:52:09 3 1 wait 2 secs hearing ringback
11:52:11 3 2 goto step 3 if available in skill 10 >= 1
11:52:11 3 3 queue-to
11:52:11 3 3 queueing to skill 10 pri m
11:52:11 3 4 wait 2 secs hearing silent
11:52:13 3 5 route-to number 354 cov n if unconditionally
11:52:13 3 6 LEAVING VECTOR PROCESSING cid 330
11:52:13 3 6 TRACE COMPLETE cid 330
