topic Attribute IP address based on HP switch number/port number ? in Operating System - Linux

Attribute IP address based on HP switch number/port number ?

Lejeune Vianney — Sun, 22 Mar 2009 10:58:36 GMT

Hello,

I have several 2650 switches (in stack) on a LAN, the IP addresses are attributed by a DHCP server, I would like to know if it's possible to attribute the IP address based on the switch number of the stack and the port number ?

Regards,
Mr Lejeune

Re: Attribute IP address based on HP switch number/port number ?

Emil Velez — Sun, 22 Mar 2009 23:23:50 GMT

Interesting question. Not that I know of but maybe I can suggest some workarounds.

1. Assumptions your DHCP server can assign a IP address to a MAC address.

2. SNMP supported switch.

What you will need to do is run a program to get a snmp dump of the switch port table. The switch port table mib will give you a port number and mac address.

From that output you can create a DHCP config where the IP is based on the switch and port number and mapped to a mac address.

Does this help you figure out how you might do it. You can use the snmpget command to get the data from a mib via the command line.

Re: Attribute IP address based on HP switch number/port number ?

Matti_Kurkela — Mon, 23 Mar 2009 21:54:21 GMT

If you allocate IP addresses by switch ports, what happens when someone plugs a hub with two or more hosts into one port?

MK

Re: Attribute IP address based on HP switch number/port number ?

Lejeune Vianney — Tue, 24 Mar 2009 11:39:22 GMT

It doesn't matter because I use a radius authentification system based on mac address, so one device is allowed per port.