Re: OT: query routers tables

[Jamie Bohr]

That would be great.  It has been awhile since I have done C programming so
it would be nice to work with it again.

Thank you,
  Jamie Bohr

On 1/3/07, Mogens Kjaer <mk(a)crc.dk&gt; wrote:
>  Jamie Bohr wrote:
>  > This question is way off topic, sorry.  I have googled and googled and
>  have
>  > not come up with a answer to my question.
>  >
>  > I want to query a switch (via SNMP I think) to get a list of systems
>  > attached to it.  I am using Nagios and would like to determine
>  > switch/router
>  > dependencies.  Trace route will not work because it will not show
>  > routers/switches for systems on the same sub-net as the system doing the
>  > trace route and I have seen where it does not return the network based
>  > switch a system is attached to, just the router.  If I could get a list
>  > systems attached to a router/switch (not a personnel switch, a managed
>  > switch) I can correlate the information and build dependencies.  I have
>  a
>  > hand-held Fluke network tester than runs Linux that will do this for me
>  > when
>  > I type in a hostname, I would rather do it programmaticly because I have
>  > over 300 systems I need to do.  I am open to any method that works that
>  I
>  > can script so I don't have to do it every time a new system
>  appears.  Just
>  > in case it matters some systems are attached to a V-lan off a managed
>  > switch
>  > and I do NOT have admin rights to the routers or switches.
>  >
>
>  I wrote a C program that uses SNMP for this.
>
>  It queries the switches and hubs for the MAC addresses
>  seen at each port and the number of bytes in/out.
>
>  Some switches have a MAC to IP table, else I would
>  ask the ARP table of the router for a table like this.
>
>  The program then prepares a nice top-10 on the
>  intraweb showing which computers are generating
>  most traffic, and another table with traffic
>  at each switch/hub port.
>
>  This program was made by studying the output from
>  snmpwalk for the switches, finding the necessary
>  MIB's etc.
>
>  The program is unreadable by anyone else
>  but me, so it is not suitable for distribution, but
>  maybe this could give you a hint on how to proceed.
>
>  Mogens
>
>  --
>  Mogens Kjaer, Carlsberg A/S, Computer Department
>  Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark
>  Phone: [phone], Fax: [phone]
>  Email: mk(a)crc.dk Homepage: http://www.crc.dk
>
>  --
>  fedora-list mailing list
>  fedora-list(a)redhat.com
>  To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
>  


-- 
Jamie Bohr