Perform a packet capture on an Adtran router

To perform a packet capture directly on an Adtran device do the following:

ip access-list extended CAPTURE permit ip any host 1.2.3.4 permit ip host 1.2.3.4 any

Where "1.2.3.4" is the IP that you want to watch.  Then run debugging on that ACL:

debug ip packet CAPTURE detail

See https://supportforums.adtran.com/message/2248#2248 for more details.