Cisco NAS and 4GB Problem

[Andreas M.]

Hello,
i have some troubles with a cisco NAS, with a 4GB problem in the Accounting Data.
First i have gigawords enabled, also the sql queries, but this is not the reason.

I have also accounting for the upstream interface enabled, but the error exists only for users, that 
are connected via virtual-interfaces (pptp dialup). Maybe this problem is not realy radius related, 
but i hope to find an answer.

I included some log entries and config examples, maybe someone has any experience with this errors.

regards,
Andreas M.

Here is the last interim update:

Tue Apr 15 23:23:46 2008
         Acct-Session-Id = "00000006"
         Tunnel-Medium-Type:0 = IPv4
         Tunnel-Assignment-Id:0 = "1"
         Tunnel-Server-Auth-Id:0 = "A_Router"
         Acct-Tunnel-Connection = "40682"
         Framed-Protocol = PPP
         Framed-IP-Address = 10.1.0.1
         User-Name = "6543765"
         Acct-Session-Time = 28088
         Acct-Input-Octets = 18615686
         Acct-Output-Octets = 218389141
         Acct-Input-Packets = 226199
         Acct-Output-Packets = 305451
         Acct-Authentic = RADIUS
         Acct-Status-Type = Interim-Update
         NAS-Port-Type = Virtual
         NAS-Port = 3
         NAS-Port-Id = "Uniq-Sess-ID3"
         Service-Type = Framed-User
         NAS-IP-Address = 192.168.1.11
         Acct-Delay-Time = 0
         Client-IP-Address = 192.168.1.11
         Acct-Unique-Session-Id = "ba144af9c3c26fc1"
         Timestamp = 1208294626


Here is the last stop record from the nas:

Tue Apr 15 23:26:28 2008
         Acct-Session-Id = "00000006"
         Tunnel-Medium-Type:0 = IPv4
         Tunnel-Assignment-Id:0 = "1"
         Tunnel-Server-Auth-Id:0 = "A_Router"
         Acct-Tunnel-Connection = "40682"
         Framed-Protocol = PPP
         Framed-IP-Address = 10.1.0.1
         User-Name = "6543765"
         Acct-Authentic = RADIUS
         Acct-Session-Time = 28250
         Acct-Input-Octets = 4294967295
         Acct-Output-Octets = 4294966951
         Acct-Input-Packets = 0
         Acct-Output-Packets = 4294967290
         Acct-Terminate-Cause = NAS-Error
         Acct-Status-Type = Stop
         NAS-Port-Type = Virtual
         NAS-Port = 3
         NAS-Port-Id = "Uniq-Sess-ID3"
         Service-Type = Framed-User
         NAS-IP-Address = 192.168.1.11
         Acct-Delay-Time = 0
         Client-IP-Address = 192.168.1.11
         Acct-Unique-Session-Id = "ba144af9c3c26fc1"
         Timestamp = 1208294788

Cisco config:

System image file is "flash:c180x-advipservicesk9-mz.124-11.XW6.bin"

A_Router#sh aaa attributes | inc giga
     Type=118   Name=input-giga-words               Format=Ulong
     Type=250   Name=output-giga-words              Format=Ulong

aaa new-model
!
!
aaa authentication login default local
aaa authentication ppp default group radius local
aaa authorization exec default local
aaa authorization commands 15 default local
aaa authorization network default group radius local
aaa accounting delay-start
aaa accounting nested
aaa accounting update periodic 3
aaa accounting network default start-stop group radius

interface Virtual-Template1
  ip unnumbered Loopback0
  ip nat inside
  no ip virtual-reassembly
  no logging event link-status
  no snmp trap link-status
  ppp encrypt mppe 128 required
  ppp authentication ms-chap ms-chap-v2