[c-nsp] NAS-Port attribute

[Цэвээндорж ЖиМэйл]

Hello,

I have problem with NAS-Port on c3825 ISR router. Access-Request packet 
contain NAS-Port attribute with 0 value.

May 27 13:54:52.984 GMT: RADIUS:  authenticator 37 5A 1D 50 70 7D DF A2 
- 9A 8A 22 80 0C C4 A0 6C
May 27 13:54:52.984 GMT: RADIUS:  Vendor, Cisco       [26]  41
May 27 13:54:52.984 GMT: RADIUS:   Cisco AVpair       [1]   35  
"client-mac-address=0030.4f6d.d45a"
May 27 13:54:52.984 GMT: RADIUS:  Framed-Protocol     [7]   6   
PPP                       [1]
May 27 13:54:52.984 GMT: RADIUS:  User-Name           [1]   12  "username"
May 27 13:54:52.984 GMT: RADIUS:  User-Password       [2]   18  *
May 27 13:54:52.984 GMT: RADIUS:  NAS-Port-Type       [61]  6   
Ethernet                  [15]
*May 27 13:54:52.984 GMT: RADIUS:  NAS-Port            [5]   6   0*
May 27 13:54:52.984 GMT: RADIUS:  NAS-Port-Id         [87]  10  "0/0/0/10"
May 27 13:54:52.984 GMT: RADIUS:  Service-Type        [6]   6   
Framed                    [2]
May 27 13:54:52.984 GMT: RADIUS:  NAS-IP-Address      [4]   6   
xxx.xxx.xxx.xxx

Why the router sent NAS-Port = 0 ?
How do I get NAS-Port ?

Sincerely,
Tseveen.