C ) Offer them a Martini on there way out :)
flem
--- Ole Drews Jensen <[EMAIL PROTECTED]> wrote:
> I hate martini Howard.
>
> Anyway, I believe I mean the latency in the switch.
>
> It's kind of, what would be the fastest thing to do:
>
> A) Put a large overcoat on and button 30 buttons.
>
> or
>
> B) Take your coat off, put a vest on with 4 buttons,
> and put the coat back
> on - (no buttons on the coat).
>
> Now consider a line of 1000 guests waiting for you
> to do A or B on them.
> What method would be the fastest to get these people
> out the door so you
> could go to bed?
>
> Have a great weekend,
>
> Ole
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~
> Ole Drews Jensen
> Systems Network Manager
> CCNA, MCSE, MCP+I
> RWR Enterprises, Inc.
> [EMAIL PROTECTED]
> ~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>
>
>
> -----Original Message-----
> From: Howard C. Berkowitz [mailto:[EMAIL PROTECTED]]
> Sent: Friday, September 08, 2000 9:34 AM
> To: [EMAIL PROTECTED]
> Subject: RE: 802.1Q or ISL
>
>
> >Thanks for your reply Tom,
> >
> >However, according to the book I'm reading, the
> 802.1Q DOES change the
> frame
> >size by adding 4 bytes into it.
> >
> >Take care,
> >
> >Ole
>
> From the horse's mouth, 802.1Q:
>
>
> 9.1 Overview
> Tagging a frame requires:
> a) The addition of a Tag Header to the frame. This
> header is inserted
> immediately following the Desti-nation
> MAC address and Source MAC address (and Routing, if
> present) fields
> of the frame to be
> transmitted;
>
>
> To return to your original question, Ole, when you
> speak of
> optimizing resource use, what do you consider the
> scarce resource?
> Other than in the martini-soaked brain (if I may use
> the term) of an
> overly zealous salesdroid, you can't optimize for
> everything at once.
> Save me from "specialists in all cars, foreign and
> domestic."
>
> Some optimizations could include:
>
> Bandwidth overhead
> Frame length
> Overhead frames (BPDU, for example)
> Latency in the switch
> Input serialization
> Processing
> Internal forwarding
> Output serialization
> Ease of use
> Interoperability
>
> Which do you want to optimize?
> >
> >
> >-----Original Message-----
> >From: Tom Walstrom [mailto:[EMAIL PROTECTED]]
> >Sent: Friday, September 08, 2000 6:30 AM
> >To: Ole Drews Jensen; [EMAIL PROTECTED]
> >Subject: RE: 802.1Q or ISL
> >
> >
> >Ole,
> >
> >ISL encapsulates the frame adding, as you said, a
> 26 byte header and a 4
> >byte CRC trailer. 802.1Q frame-tagging does not
> change the frame size
> >(hence its interoperability, because it appears as
> a standard ethernet
> frame
> >to non-802.1Q devices), but does modify the
> existing frame with VLAN
> >identification information.
> >
> >I would suspect that the real reason to deploy ISL
> is that it runs one
> >spanning tree per vlan where 802.1Q runs only one
> spanning tree. Also ISL
> >allows bonding into etherchannels. Seems like this
> would be more likely to
> >make a difference on the network. I would think
> you would only do 802.1Q
> >where interoperability was the issue, like with a
> Catalyst 4000 which I
> >believe only supports 802.1Q. Maybe some switch
> guru could further
> >illuminate this issue.
> >
> >Regards,
> >
> >Tom
> >
> >-----Original Message-----
> >From: Ole Drews Jensen
> [mailto:[EMAIL PROTECTED]]
> >Sent: Thursday, September 07, 2000 1:38 PM
> >
> >Just a thought. - Digging through another book
> towards the light at the end
> >of the tunnel, I have now added VLAN Trunc Links to
> my knowledge. That has
> >brought this question up in my mind, so I would
> like to hear some feedback
> >on this subject.
> >
> >I know that much of this depends on the average
> frame sizes, so lets say
> >that I have analyzed my network, and the average
> frame size is 800. Lets
> >also say that we are only dealing with Cisco
> Catalyst switches in this
> >scenario.
> >
> >The question is, what would be least resource-waste
> to use as a trunking
> >link : ISL or 802.1Q???
> >
> >The 802.1Q has to break the frame open to modify
> it, but it adds only 4
> >bytes to each frame.
> >
> >The ISL does not have to break the frame open
> because it simply
> encapsulates
> >it into a new one, but it adds 30 bytes to each
> frame.
> >
> >Any comments on this?
> >
> >Thanks,
> >
> >Ole
>
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