[c-nsp] BGP SNMP Question, strangeness

Phil Mayers p.mayers at imperial.ac.uk
Thu Feb 26 10:50:21 EST 2015


On 26/02/15 13:52, John Brown wrote:
> Hi.
>
> I'm showing what appears to be bgp neighbors, yet those neighbor IP's
> are not configured on our 6500 at the exchange.   This is causing our
> monitoring system (Observium) to report "phantom" neighbors
>
> here is a brief dump from snmp.
>
> SNMPv2-SMI::mib-2.15.3.1.1.32.1.4.24 = IpAddress: 129.250.0.71
> SNMPv2-SMI::mib-2.15.3.1.1.32.1.5.4 = IpAddress: 203.117.34.253
> SNMPv2-SMI::mib-2.15.3.1.1.32.1.24.24 = IpAddress: 0.0.0.0
>
> the 32.1.4.24, 32.1.5.4 and 32.1.24.24 do NOT exist in our system.

This maybe looks like brokenness with IPv6 addresses treated as IPv4:

32 = 0x20
1  = 0x01
24 = 0x18

2001:1818:

?


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