Re: Increasing ARP cache size?

Hi again,

Carsten Aulbert wrote:
probably a stupid question from my side, but after hours looking through
sunsolve and google results I still don't get any further.

How can I increase the size of my arp cache on Solaris 10u5? We have a
network here where close to 1800 machines ar flat on the same network
and it seems (from looking at arp -a | wc -l on several boxes) show that
it maxes out at around 1518.

I have found many articles on changing the time how long an entry is in
there, but drew a blank so far.

Is there a simple way to achieve this?

I've juggeled around a bit with the settings I can change via
ndd /dev/arp

but currently I'm just making pretty blind guesses and the best
documentation found so far is this:
http://www.opensolaris.org/os/community/networking/dad-design.pdf

But at least with a longer cleanup_interval it seems already going up by
more than 150 additional entries and I think I need to get rid off the
probes (or limit them further)...

Does anyone know a nice reference where these arp configuration
parameters are explained in some detail?

arp_cleanup_interval
arp_publish_interval
arp_publish_count
arp_probe_delay
arp_probe_interval
arp_probe_count
arp_fastprobe_delay
arp_fastprobe_interval
arp_fastprobe_count
arp_defend_interval
arp_defend_rate
arp_broadcast_interval
arp_defend_period

Cheers and a Happy New Year

Carsten
.

Relevant Pages

  • Questions about 192.168
    ... show up in my arp cache after doing this. ... cable modem directly, it did show up in my arp cache. ... I recently checked my firewall (Network ICE), and noticed an attack ...
    (Security-Basics)
  • Re: [Full-Disclosure] Re: The ArpSucker is b0rn! Be yourself, be the net.
    ... > If it's not a threat to you're wonderfully managed ... >> the ENTIRE NETWORK! ... >> The tests of the global arp cache smashing were ... The Elibus' ...
    (Full-Disclosure)
  • Re: SMS 2003 Network Discovery (idle state detected)
    ... I am using SMS 2003 to manage only servers of my network. ... I configured the network discovery only with the options that I need ... I have to use only SNMP devices and the arp cache for network ... I think that the problem is in my router, ...
    (microsoft.public.sms.admin)
  • Re: DHCP access
    ... Could you please explain what is meant by '/24 segment'? ... meaning that there are 256 IP's in that network. ... >>because the arp cache has to be filled somehow. ... the other station) back throughout the segment. ...
    (freebsd-questions)
  • Re: Increasing ARP cache size?
    ... if your performance from a horrible design was fine you would not be here ... asking how to increase the size of your arp cache in the first place. ... you have a giant flat network, ... Solaris based systems the network is suddenly fine again. ...
    (comp.unix.solaris)