02-02-2007 11:06 AM
Does anyone know what SNMP MIB OID would contain the age for an ARP entry? For example under IOS, each ARP entry has an age associated with it.
Router>sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.112.36 17 0800.20ff.ded2 ARPA Vlan112
Internet 192.168.121.44 8 0002.b3d8.0ae9 ARPA Vlan120
Internet 192.168.120.45 8 0006.5bdd.1cbe ARPA Vlan120
Is it possible to obtain that same "Age" value via SNMP?
Thanks,
Nathan
02-03-2007 04:19 PM
No, this value is not available via SNMP. The IP-MIB's ipNetToMedia table will just give you the hardware address, network address, associated inerface, and entry type (e.g. static, dynamic, etc.).
02-05-2007 05:51 PM
Thanks for the reply.
So, what value does the OID ipAddressCreated (.1.3.6.1.2.1.4.34.1.8) convey? And what platforms/IOS version is it supported? Cisco's docs aren't very clear ("its support depends on the Cat6500 platform and IOS version").
Thanks,
Nathan
02-05-2007 05:59 PM
In which documentation are you seeing this object? I don't see any version of the Cat 6500 code that supports an IP-MIB that contains this object, or even this branch. This object is newly defined in RFC 4293.
Even if this object is supported, it does not appear to be applicable to ARP entries, but rather to interface addresses.
02-06-2007 05:31 PM
According to this webpage, Cat6500 running 12.2(18)SXF7 supports Cisco-IETF-IP-MIB.my.
ftp://ftp-sj.cisco.com/pub/mibs/supportlists/wsc6000/wsc6000-supportlist-ios.html
Is the OID ipAddressCreated not part of Cisco-IETF-IP-MIB.my? I've done an snmpwalk on my 6500 running 12.2(18)SXF7, and it just returns a "no such name" error. I'm interested in this object also because it may provide me with age information on IP addresses, although my main focus is the age of ARP entries.
Thanks,
Nathan
02-06-2007 07:03 PM
ipAddressCreated is not part of the CISCO-IETF-IP-MIB, it is part of the newer IP-MIB which is different.
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