I'm sure that Howard would have a good perspective on this :)
Generally, "gateway" and "router" are used interchangeably, especially
in this context of Cisco routing Cert preparation, just meaning sending
off this network onto another network. E.g., "default gateway" or
"gateway of last resort"
I've seen definitions that basically say that if the box is dedicated to
routing, then it's a router. If it's a server doing other things and
happens to have more than one NIC and does routing, then it's called a
gateway.
However, I've seen other definitions that make (I think, reasonably) a
clear distinction:
. routers convert packets at level 3 and don't change underlying data.
. gateways convert packets at higher levels of the OSI model, e.g.,
switching between protocols -- some say at all 7 layers. Like say a
Gator box.
When Dorothy is wending thru the paths on the farm, she's routing.
When she clicks her heels, she's going thru a gateway :)
Again, I'm sure that Howard can give us the entire etymology of the
terms :)
-------------------------------------------------
Tks |
BV |
Sr. Technical Consultant, SBM, A Gates/Arrow Co.
Vox 770-623-3430 11455 Lakefield Dr.
Fax 770-623-3429 Duluth, GA 30097-1511
=================================================
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Circusnuts
Sent: Friday, May 25, 2001 1:22 PM
To: [EMAIL PROTECTED]
Subject: Re: Meaning of a gateway [7:5918]
Assume you are referring to the gateway of last resort, (0.0.0.0 0.0.0.0
E0
or IP Address) meaning... if cannot get where you are looking to go by
any
other means (routing protocol, etc., etc.,) head to E0 for resolution...
Phil
----- Original Message -----
From: Tan Chee Leong
To:
Sent: Friday, May 25, 2001 12:07 PM
Subject: Meaning of a gateway [7:5918]
> Hi,
>
> I have been thinking abt it and couldn't figure out so hope I can help
some
> pointers from this group. Sorry if the question sounds silly.
>
> I do understand what a gateway is for but when it is configured in a
router,
> what exactly happens?
>
> Will it do the same if I make an entry in the route table like
0.0.0.0/0
> eth0
>
> Effectively saying that for a particular destination, if it is not
already
> routed (by other entries in the route table) then just push the packet
to
> eth0 (presumably where the gateway is situated).
>
> Thks.
>
> Cheers,
> Chee Leong
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