how to troubleshoot error on snapvault

[ARnetapp]

how can i troubleshoot this issue .. snapvault isn't connecting to its source.. 

On the Source side everything is up and running perfectly fine..

Source:                 EABCDETW01:/vol/cifs_fs01/-

Destination:            ecdrtudt01b:/vol/sv_ EABCDETW01/qtree_11112013_092530

Status:                 Idle

Progress:               -

State:                  Snapvaulted

Lag:                    4616:05:04

Mirror Timestamp:       Fri Jul 20 00:00:07 CDT 2018

Base Snapshot:           ecdrtudt01b  (1886747403)_sv_EABCDETW01_qtree_11112013_092530-dst.0

Current Transfer Type:  Retry

Current Transfer Error: cannot connect to source filer

Contents:               Transitioning

Last Transfer Type:     Update

Last Transfer Size:     2904 KB

Last Transfer Duration: 00:00:57

Last Transfer From:     EABCDETW01  :/vol/cifs_fs01/-

[GrumpyOldMen]

Did you try to ping from the source to the destination? Did it work?

Are snapvault schedules defined on source and destination...

What about messages in snapmirror.log?

[ARnetapp]

From both the source and destination it says it's alive

on the source side I checked 

snapmirror.access            legacy

---------------------

rdfile /etc/snapmirror.allow
ecdrtudt02b
ecdrtudt03b
ecdrtudt04b

The destination isn't listed... I also checked for this on the destination side and source isn't listed