Re: Layer 2 Trace

From: James Eaton-Lee (james.mailing@gmail.com)
Date: Sat Dec 03 2005 - 15:00:45 EST


On Sat, 2005-12-03 at 11:44 -0800, Gary E. Miller wrote:
> You are confusing layer 2 and layer 3. There are no IPs on layer 2!
>
> I often put several layer 3 IP subnets on one physical layer 2 net. You
> can do this with or without using VLAN tagging.

I was trying to explain the distinction between a layer 2 segment and a
larger network operating over layer 3 using layer 3 terminology - not
quite confusing the two, but yes, you're right, I should have been
clearer there.

What I would have said if I'd had any sleep would have been: "Layer two
only provides connectivity to machines attached to the same
segment. In the case of a layer three network using TCP/IP this means
the local network segment, such as a 192.168.0.1/24 class C subnet of
255 hosts". This subnet has layer two connectivity - anything further
afield doesn't". ;)

 - James, who will now proceed to get some sleep

> RGDS
> GARY
> - ---------------------------------------------------------------------------
> Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701
> gem@rellim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676
>
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-- 
James (njan) Eaton-Lee | 10807960
Semper Monemus Sed Non Audiunt, Ergo Lartus - (Jean-Croix)
sites: http://www.bsrf.org.uk - http://www.security-forums.com
ca:    https://www.cacert.org/index.php?id=3




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