Ethereal-dev: Re: [ethereal-dev] Plugin for Cisco ISL

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Index Thread Index Other Months All Mailing Lists
Date Prev Date Next Thread Prev Thread Next
From: Guy Harris <gharris@xxxxxxxxxxxx>
Date: Mon, 24 Jan 2000 16:09:55 -0800
> FWIW, take note that the Cisco multicast OUI of 01-00-0C is used for some
> other things too.  I have seen Cisco routers sending periodic announcements
> to 01-00-0C-CC-CC-CC that have something to do with IOS.  So make sure you
> use the WHOLE destination address

Or, rather, the first 5 octets, as the 6th octet contains the
encapsulation type plus a per-encapsulation-type value of some sort
(it's a priority for Ethernet, and distinguishes different packet types
in some unspecified fashion - LLC vs. MAC? - on Token Ring).

The change I checked in to the Ethernet dissector checks the first 5
octets.

> and not just the top 6 bytes.

The top 6 bytes *is* the whole destination address; presumably you meant
"not just the top 6 hex digits"?