[Nfdump-discuss] Next hop IP addr isn't stored

[Joan <as...@gm...>]

I am collecting netflow data that has both AS information (ext.2) and
next-hop information(ext 4)
I can verify that this data is being send by launching a tshark session
> tshark -i eth1 host 192.168.1.9 -d udp.port==2591,cflow  -s0 -V
Would output something like this:

>        Flow 7
>            [Duration: 0.001000000 seconds]
>                StartTime: 64609.881000000 seconds
>                EndTime: 64609.882000000 seconds
>            Octets: 60
>            Packets: 1
>            IPVersion: 04
>            InputInt: 0
>            OutputInt: 0
>            Direction: Ingress (0)
>            SrcAddr: 123.123.123.1 (123.123.123.1)
>            DstAddr: 37.139.120.55 (37.139.120.55)
>            BGPNextHop: 125.5.5.5 (125.5.5.5)
>            SrcPort: 10960
>            DstPort: 17500
>            IP ToS: 0x00
>            TCP Flags: 0x00
>            Protocol: 17
>            SrcAS: 4808
>            DstAS: 7629

The capture daemon is like this (launched by nfsen)
> /usr/bin/nfcapd -w -D -p 2591 -u netflow -g www-data -B 200000 -P
/var/lib/netflow/var/run/p2591.pid -z -T +4 -n flow_host 192.168.1.9
/var/lib/netflow/profiles-data/live/flow_host

With this nfdump command:
> nfdump -r
/var/lib/netflow/profiles-data/live/flow_grn_es/nfcapd.current.* -o
'fmt:%sa %dap %fl %byt %nhb %pkt %sas %das' 'host 125.5.5.5'

Prints this out
>     Src IP Addr      Dst IP Addr:Port  Flows    Bytes  BGP next-hop IP
 Packets Src AS Dst AS
>     123.123.123.1        125.5.5.5:0.0       1       84          0.0.0.0
       1  4808   7629
>       125.5.5.5      123.123.123.1:0.0       1       84          0.0.0.0
       1   7629  4808
>     123.123.123.1        125.5.5.5:0.0       1       84          0.0.0.0
       1  4808   7629
>       125.5.5.5      123.123.123.1:0.0       1       84          0.0.0.0
       1   7629  4808


So at some point the nexthop information is lost, and apparently not stored
into the flow data.
Can someoen give me some light?