On Tue, 21 Feb 2017 12:33:08 +0000 Jan Sigurd Refvik email@example.com wrote:
We have recently noticed that machine tracker will report duplicate arps on every entry on networks running hsrp.
Hi Jan Sigurd,
NAV will happily dump ARP and ND cache tables from any router you are monitoring, regardless of whether it works in tandem with other routers on the same subnet. Interface config doesn't enter into it.
The source router is part of NAV's arp record, so the key for identifying a unique, open record is basically router+IP+MAC. If the source router is different, there will be a "duplicate" record for the same IP+MAC combo.
I'm not aware of whether the various router redundancy protocols guarantee that all cooperating routers will have the same exact set of ARP/ND records available at any given time.