[j-nsp] Opportunistic ARP on Juniper MX?

[Prabhu Gurumurthy]

Yes, juniper will re-arp after aging timer expires, default is 20 minutes.
Juniper usually adds a jitter so that ARP does not expire en masse.

If the ARP reply is not received, packets will be dropped unless the
corresponding reply to who-has comes back

Hope this helps
Prabhu
 On May 26, 2014 12:40 AM, "Sebastian Wiesinger" <juniper-nsp at ml.karotte.org>
wrote:

> * Mark Tinka <mark.tinka at seacom.mu> [2014-05-26 09:18]:
> > On Monday, May 26, 2014 09:10:20 AM Sebastian Wiesinger
> > wrote:
> >
> > > does anyone know if Juniper MX does opportunistic ARP?
> > > Meaning, will it send out an ARP request by itself when
> > > an ARP entry expires (like Cisco does) or will it wait
> > > until it needs to resolve the ARP entry when a packet
> > > arrives?
> >
> > You mean gratuitous ARP?
> >
> >       http://tinyurl.com/lpc8mcu
>
> No, I mean when an ARP entry for a host expires, will the router send
> an ARP request for that entry immediately (like Cisco does) or will it
> wait until a packet for that host arrives, meaning that packets
> will be dropped until an ARP reply arrives and the entry is resolved.
>
> Regards
>
> Sebastian
>
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