[c-nsp] AAA accounting issue

[Nikolay S.]

Hello,
        
I'm using 7301 as vrf-aware NAS to terminate PPP sessions from l2tp
tunnels into vrfs, and there is huge discrepancy between traffic
counters on virtual-access interface and accounting records. For
example:

-----------
#sh int virtual-access 4
...
226 packets input, 11393 bytes, 0 no buffer
...
263 packets output, 13465 bytes, 0 underruns
-----------
#sh aaa user 115
Unique id 115 is currently in use.
...
66BC01A0 0 00000001 bytes_in(135) 4 11846(2E46)
66BC01B0 0 00000001 bytes_out(275) 4 23802(5CFA)
66BC01E0 0 00000001 paks_in(136) 4 235(EB)
66BBF5D0 0 00000001 paks_out(276) 4 273(111)
-----------

Packet counters do match, but output bytes is almost twice in aaa.