I am sitting on a 2501 and the encap command can only be used when
configuring ipx subcommands. (running 11.3)
HTH
Ryan
RouterC(config-if)#?
Interface configuration commands:
access-expression Build a bridge boolean access expression
appletalk Appletalk interface subcommands
arp Set arp type (arpa, probe, snap) or timeout
backup Modify dial-backup parameters
bandwidth Set bandwidth informational parameter
bridge-group Transparent bridging interface parameters
carrier-delay Specify delay for interface transitions
cdp CDP interface subcommands
cmns OSI CMNS
custom-queue-list Assign a custom queue list to an interface
decnet Interface DECnet config commands
default Set a command to its defaults
delay Specify interface throughput delay
description Interface specific description
exit Exit from interface configuration mode
fair-queue Enable Fair Queuing on an Interface
help Description of the interactive help system
hold-queue Set hold queue depth
ip Interface Internet Protocol config commands
ipx Novell/IPX interface subcommands
keepalive Enable keepalive
--More--
-----Original Message-----
From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 08, 2001 1:57 PM
To: [EMAIL PROTECTED]
Subject: Re: FW: Another 802.3 and Ethernet Question
OK, I have a dumb question. When we talk about "default" encapsulation, are
we talking about an actual command? The "encapsulation" command can be
entered in Ethernet interface mode, I think. (I'm not near a router now.)
The only times I ever change the encapsulation is with the ipx network
encap command.
Thanks for the interesting conversation.
Priscilla
At 10:59 AM 2/8/01, Leigh Anne Chisholm wrote:
>-----Original Message-----
>From: Leigh Anne Chisholm [mailto:[EMAIL PROTECTED]]
>Sent: February 8, 2001 10:17 AM
>To: Jim Dixon
>Subject: RE: Another 802.3 and Ethernet Question
>
>
>Actually, what I'm saying is that John wanted to know whether or not he
>should change the default Ethernet frame type from Ethernet_II to Ethernet
>802.3. My question was meant to provoke John to understand what the
default
>frame type is used for--which really is a pre-requisite to be able to
>understand what benefits or drawbacks (if any) changing the default frame
>type would bring.
>
>Why Ethernet_II is the default frame type likely has to do with the fact
>that most packets that don't have a pre-determined Ethernet frame type
don't
>require the functionality that's inherent within 802.3 or provided by the
>inclusion of an 802.2 header. It's a frame type that's supported by the
>most antique Ethernet equipment since it's the original Ethernet
>specification.
>
>I thought it was also worthy of discussion, because how the default
Ethernet
>frame type is used by a router differs from IPX in that a router will route
>ANY IP Ethernet frame - not just the specified frame type. Comparing IPX
>Ethernet frame types to IP frame types is, in my opinion, somewhat akin to
>comparing apples and oranges. They're both fruits, but they've got
>differences that make each unique and unable to be compared.
>
>In summary, I've found that a small chunk of my brain has been "Howard
>Berkowitz-ized" -- or, in other words, the question that came to mind when
>John asked if he should change the default Ethernet frame type was... "What
>problem is it that you're trying to solve?" And without understanding when
>the default Ethernet frame type came into play, he couldn't assess what the
>implications of his change would be.
>
>If you don't mind, I'd like to cc this message to the Groupstudy group
>(minus this paragraph of course). I think it will help clarify in the
minds
>of some, exactly what it was that I was trying to get at, and why. And I
>think you bring up some interesting points for thought...
>
>
> -- Leigh Anne
>
>-----Original Message-----
>From: Jim Dixon [mailto:[EMAIL PROTECTED]]
>Sent: February 8, 2001 9:07 AM
>To: Leigh Anne Chisholm
>Subject: RE: Another 802.3 and Ethernet Question
>
>
>Now, finally it begins to make sense what you were talking about. It was
>confusing us a bit.
><I think :) >
>
>You are saying why go to all the trouble of having a dam DEFAULT type if
>they will either ignore, drop, or just frigging encapsulate the
>(@#*$(@#*&&$-ity-blank-ity packet anyway right?
>
>So your question was not how, or what, by WHY WHY WHY!!! :)
>
>the answer is
>
>It Depends on whom you ask as to what the answer will be.
>
>I suppose it had something to do with 802.3 being the MOST POPULAR with
>Novell be prolific earlier on.
>Then when they came out with an 802.2 support in what
>3.12 < I think > it really showed that they were too proprietary and were
>coming around to the unix world's way of thinking.
>
>So I guess since there was always a mish-mash of protocols in networks
being
>not-upgraded immediately but over time a decision had to be made on which
>protocol to support out of the box and how to support the protocols that
>were EXTRA on the network.
>
>I think maybe they just did what they had to do instead of what needed to
>happen.
>
>So in the end, we have no answers only
>
>I thought, you thought, and we all thinked thanked and thunk about it till
>it thunked itself into the future.
>
>
>Seriously though, thanks for telling us what you had in mind.
>
>have a good day and give your brain a break, you could stop by the Nasa
>homepage and watch NASA TV. Atlantis lifted off yesterday at about 17:30
>Central time (Successfully) I was a little dissapointed because there was
>only a one sentence mention on the news about it but they spent 5 minutes
>talking about some wreck that just happened and killed some people.
>ANyWAY that's a different argument.
>
>See you
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
________________________
Priscilla Oppenheimer
http://www.priscilla.com
_________________________________
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Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
