snmp question
 

Hi :)
Do u have in mind any oid that maps the interface with an ip address?

just use snmpwalk to read the available oid in the interface branch.

In the interface branch there is no ipaddress that i need.. Do u have anything else in mind?

well search the whole lot then.. it's not tricky just to grep it and look around the output a little...

try IP-MIB::ipAdEntIfIndex (.1.3.6.1.2.1.4.20.1.2)

Thx a lot
What make things strange is the fact that the command

snmpwalk -v1 -c public 192.168.1.10 .1.3.6.1.2.1.4.20.1.2
IP-MIB::ipAdEntIfIndex.127.0.0.1 = INTEGER: 1
IP-MIB::ipAdEntIfIndex.192.168.0.1 = INTEGER: 3
IP-MIB::ipAdEntIfIndex.192.168.1.10 = INTEGER: 2

returns 3 entries.. I have some c code that queries the snmp server using the oid and stores the return value to a variable.. The problem i think is how to retrieve the ip address when the specific oids return 1 ,3 and 2 accordingly

Walking a MIB is not easy.

If I were in your shoes, I would first walk the "if" portion of the mib and find:

1) Number of bound interfaces - IF-MIB::ifNumber.0

2) Setup a loop to walk the "if" MIB like "for ( i =1, IF-MIB::ifNumber.0, i++)"

3) Loop the "if" MIB for the physical interface name you are looking for (like eth0) and find the corresponding "if" index number. Should be 1, 2 or 3 using your example.

4) Now search the "ip" portion of the MIB that corresponds to the physical index number.

BTW: I always add -Ofn to snmpwalk/snmpget commands.

Good Luck