SUMMARY: strange arp

From: Anchi Zhang (
Date: Fri Oct 14 1994 - 23:28:31 CDT


My shortened original posting:

  One quick way to find the MAC addresses of all the devices on
  a subnet from a Sun is

        % ping
        % arp -a

  My problem is that the above gives inconsistent results if
  used repeatedly in a short period of time. Is anybody else
  seeing the same and why?

Many thanks to (Eckhard Rueggeberg)
        stern@sunrise.East.Sun.COM (Hal Stern - NE Area Systems Engineer) (Dan Lorenzini)

who suggested that the inconsistency may be due to the way the arp
cache is hashed. Both and stern@sunrise.East.Sun.COM
recommended pinging each machine to find all the MAC addresses.

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