SNMP: Get IP Address 1

[johnny042]

Hello everyone,

I am building a sort of SNMP web application to manage CPE using PHP. Let's say a customer has a few hundred CPE modems he would like to manage via SNMP, but his modems grab DHCP addresses every few days. To my understanding, SNMP requires that you know the static IP address or static hostname. Aside from having DDNS hostnames on all his modems, what else could possibly be used as a work-around? Is there a type of network discovery unicast for SNMP?

Thank you

 

[KPrakash]

As of my knowledge there is no option to network discovery. it is all user has to request the snmp Agent.
another work around you can have is if that modem supports traps .. then you can configure to send trap every time ip changes.

 

[johnny042]

Thanks KPrakash, I'll be testing using an extension called ActiveSocket

 

[jvh75021]

This is not a proper answer to the original but there are products that perform discovery. There is a product called Loriot Pro 5 that has a freeware version. It will discover and produce a map of network object and determine if they are managed, even going beyond routers. I suspect it is a two step process of finding devices and then testing them with some core requests such as sysUptime.

Just a thought.

jh

 

[johnny042]

Thanks jh.

I agree with you on the way the 'discovery' process works, it seems to send out pings to find devices and then send SNMP requests to see if it receives an answer back.