Some searching will help with the sorting question... However there's a better way. Check if your router is capable of Netflow export. You can have the routers export to a collector machine, much much better than polling the router for stats.

I'm using the cflowd package (C code) to collect the flows, but for processing there's Cflow.pm (same guy who wrote cflowd). A typical export looks something like: 

$ flowdumper -e '($exporterip eq "192.168.251.43") && ($input_if == 6)
+' -c ../flows.current
FLOW
  index:          0xc7ffff
  router:         192.168.251.43
  src IP:         64.12.27.230
  dst IP:         192.168.252.188
  input ifIndex:  6
  output ifIndex: 9
  src port:       5190
  dst port:       2877
  pkts:           11
  bytes:          2291
  IP nexthop:     192.168.254.1
  start time:     Mon Feb 25 16:29:47 2002
  end time:       Mon Feb 25 16:32:42 2002
  protocol:       6
  tos:            0x0
  src AS:         0
  dst AS:         0
  src masklen:    0
  dst masklen:    24
  TCP flags:      0x1a (SYN|ACK|PUSH)
  engine type:    1
  engine id:      1
...snip...
matched 19333 of 27695 flows
$

[download]

The tools available are quite flexible. FlowScan is a perl application to gather stats/make graphs with a backend RRD database. If nothing else it's a good place to start rolling your own.

In reply to Re: Sorting Cisco IP accounting data! by zengargoyle
in thread Sorting Cisco IP accounting data! by Baiul

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