3 Replies Latest reply on Apr 6, 2010 9:55 AM by Network_Guru

    IP address to interface mapping

      I need to add a ton of devices to DNS, and basically I want to get from a device all its IP'd interfaces.   This would be a lot faster if I could script it considering some core routers have up to 20 IP'd interfaces (vlan/interfaces/etc)

      Since I use NPM to monitor and poll all the devices on the network.  Is there a way to get NPM to grab all the IP addresses configured on a device, as well as the interfaces and dump that in some sort of a useful table?

      Or does anyone have or recommend a perl script that will snmp poll a device and pull any IP addresses configured (ifTable) and map it to its coordinating interface (ipAddrTable)

       

      Device         - IP               - interface
      switch1       - 10.4.2.217 - Vlan2 
      For example I have a layer2 switch with VLAN2 ip'd to: 10.4.2.217
      I think I can use the following commands to get the data I need, but I don't know how to sort it to to get:
      $ snmpwalk -v 2c -c public 10.4.2.217 RFC1213-MIB::ifIndex
      IF-MIB::ifIndex.1 = INTEGER: 1
      IF-MIB::ifIndex.2 = INTEGER: 2
      IF-MIB::ifIndex.10001 = INTEGER: 10001
      IF-MIB::ifIndex.10002 = INTEGER: 10002
      IF-MIB::ifIndex.10003 = INTEGER: 10003
      IF-MIB::ifIndex.10004 = INTEGER: 10004
      IF-MIB::ifIndex.10005 = INTEGER: 10005
      IF-MIB::ifIndex.10006 = INTEGER: 10006
      IF-MIB::ifIndex.10007 = INTEGER: 10007
      IF-MIB::ifIndex.10008 = INTEGER: 10008
      IF-MIB::ifIndex.10009 = INTEGER: 10009
      IF-MIB::ifIndex.10010 = INTEGER: 10010
      IF-MIB::ifIndex.10011 = INTEGER: 10011
      IF-MIB::ifIndex.10012 = INTEGER: 10012
      IF-MIB::ifIndex.10013 = INTEGER: 10013
      IF-MIB::ifIndex.10014 = INTEGER: 10014
      IF-MIB::ifIndex.10015 = INTEGER: 10015
      IF-MIB::ifIndex.10016 = INTEGER: 10016
      IF-MIB::ifIndex.10017 = INTEGER: 10017
      IF-MIB::ifIndex.10018 = INTEGER: 10018
      IF-MIB::ifIndex.10019 = INTEGER: 10019
      IF-MIB::ifIndex.10020 = INTEGER: 10020
      IF-MIB::ifIndex.10021 = INTEGER: 10021
      IF-MIB::ifIndex.10022 = INTEGER: 10022
      IF-MIB::ifIndex.10023 = INTEGER: 10023
      IF-MIB::ifIndex.10024 = INTEGER: 10024
      IF-MIB::ifIndex.10101 = INTEGER: 10101
      IF-MIB::ifIndex.10102 = INTEGER: 10102
      IF-MIB::ifIndex.10501 = INTEGER: 10501
      $ snmpwalk -v 2c -c public 10.4.2.217 RFC1213-MIB::ipAdEntIfIndex
      IP-MIB::ipAdEntIfIndex.10.4.2.217 = INTEGER: 2
      $ snmpwalk -v 2c -c public 1 10.4.2.217 IP-MIB::ipAdEntAdd
      IP-MIB::ipAdEntAddr.10.4.2.217 = IpAddress: 10.4.2.217
      $ snmpwalk -v 2c -c public 10.4.2.217 RFC1213-MIB::ifDescr
      IF-MIB::ifDescr.1 = STRING: Vlan1
      IF-MIB::ifDescr.2 = STRING: Vlan2
      IF-MIB::ifDescr.10001 = STRING: FastEthernet0/1
      IF-MIB::ifDescr.10002 = STRING: FastEthernet0/2
      IF-MIB::ifDescr.10003 = STRING: FastEthernet0/3
      IF-MIB::ifDescr.10004 = STRING: FastEthernet0/4
      IF-MIB::ifDescr.10005 = STRING: FastEthernet0/5
      IF-MIB::ifDescr.10006 = STRING: FastEthernet0/6
      IF-MIB::ifDescr.10007 = STRING: FastEthernet0/7
      IF-MIB::ifDescr.10008 = STRING: FastEthernet0/8
      IF-MIB::ifDescr.10009 = STRING: FastEthernet0/9
      IF-MIB::ifDescr.10010 = STRING: FastEthernet0/10
      IF-MIB::ifDescr.10011 = STRING: FastEthernet0/11
      IF-MIB::ifDescr.10012 = STRING: FastEthernet0/12
      IF-MIB::ifDescr.10013 = STRING: FastEthernet0/13
      IF-MIB::ifDescr.10014 = STRING: FastEthernet0/14
      IF-MIB::ifDescr.10015 = STRING: FastEthernet0/15
      IF-MIB::ifDescr.10016 = STRING: FastEthernet0/16
      IF-MIB::ifDescr.10017 = STRING: FastEthernet0/17
      IF-MIB::ifDescr.10018 = STRING: FastEthernet0/18
      IF-MIB::ifDescr.10019 = STRING: FastEthernet0/19
      IF-MIB::ifDescr.10020 = STRING: FastEthernet0/20
      IF-MIB::ifDescr.10021 = STRING: FastEthernet0/21
      IF-MIB::ifDescr.10022 = STRING: FastEthernet0/22
      IF-MIB::ifDescr.10023 = STRING: FastEthernet0/23
      IF-MIB::ifDescr.10024 = STRING: FastEthernet0/24
      IF-MIB::ifDescr.10101 = STRING: GigabitEthernet0/1
      IF-MIB::ifDescr.10102 = STRING: GigabitEthernet0/2
      IF-MIB::ifDescr.10501 = STRING: Null0