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* [Sysadmins] ipcad и индексы интерфейсов
@ 2009-09-24  9:26 Денис Ягофаров
  0 siblings, 0 replies; only message in thread
From: Денис Ягофаров @ 2009-09-24  9:26 UTC (permalink / raw)
  To: ALT Linux sysadmin discuss

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Доброго времени суток.

Использую ipcad (ipcad-3.7.3-alt0.M40.1, x64) как netflow сенсор. В 
маршрутизаторе есть несколько интерфейсов, конфиг ipcad:

capture-ports disable;
interface veth1;
interface tun0;
aggregate 10.8.0.0/24 strip 32;
aggregate 30000-65535   into 65535;     /* Aggregate wildly */
netflow export destination 10.3.0.17 5556;
netflow export version 5;
netflow timeout active 30;
netflow timeout inactive 15;
netflow engine-type 73;
netflow engine-id 1;
netflow ifclass veth mapto 0-99;                # i.e., "eth1"->1, "eth3"->3
netflow ifclass fxp mapto 0-99;         # i.e., "fxp4"->4, "fxp0"->0
netflow ifclass ppp mapto 100-199;      # i.e., "ppp32"->532, "ppp7"->507
netflow ifclass gre mapto 200-299;
netflow ifclass tun mapto 300-399;      # i.e., "tun0"->300
rsh off;
dumpfile = ipcad.dump;  # The file is inside chroot(), see below...
chroot = /var/lib/ipcad;
pidfile = ipcad.pid;
memory_limit = 1m;

В логах, всё _почти_ правильно:
Sep 23 19:20:19 calcium ipcad: Opening veth1... [LCap]
Sep 23 19:20:19 calcium ipcad: Initialized as 1
                                                      ^^^^^^^^^^^ -> не 
понятно, это он о SNMP?
Sep 23 19:20:19 calcium ipcad: Opening tun0... [LCap]
Sep 23 19:20:19 calcium ipcad: Initialized as 2
                                                      ^^^^^^^^^^^ -> не 
понятно, это он о SNMP?
Sep 23 19:20:19 calcium ipcad: Configured NetFlow destination at 
10.3.0.17:5556
Sep 23 19:20:19 calcium ipcad: Warning: Option at line 189 has no effect
Sep 23 19:20:19 calcium ipcad: Aggregate network 10.8.0.0/255.255.255.0 
-> 255.255.255.255
Sep 23 19:20:19 calcium ipcad: Aggregate ports 30000..65535 into 65535
Sep 23 19:20:19 calcium ipcad: Daemonized.
Sep 23 19:20:19 calcium ipcad: ipcad startup succeeded

Захватывают трафик так:
flow-capture -b big -p /var/run/flowtool_vr.pid -w 
/var/www/apache2/cgi-bin/FlowViewer_3.3.1/flows/vpn_router -n 287 -N 3 
-S 5 0/0/5556

Пробую посмортеть отчёт:
flow-cat ./flows/vpn_router/2009/2009-09/2009-09-24/ft-v05.2009-09-24.* 
| flow-print -f 5 | head
Start                       End                         Sif       
SrcIPaddress   SrcP  DIf   DstIPaddress  DstP P   Fl Pkts     Octets
0923.23:59:56.578 0923.23:59:56.578 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:00:11.948 0924.00:00:11.948 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:00:27.315 0924.00:00:27.315 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:00:42.685 0924.00:00:42.685 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:00:58.052 0924.00:00:58.052 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:01:13.422 0924.00:01:13.422 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:01:28.789 0924.00:01:28.789 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100
0924.00:01:44.159 0924.00:01:44.159 65535 10.3.0.6        65535 65535 
10.3.0.17       5556  17  0  1          100

Проблема в том, что для потоков через любой интерфейс Sif = 65535, DIf = 
65535. Для маршрутизатора с бОльшим количеством интерфейсов - 
аналогично. Где же я ошибся? ... или это баг/фича?


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