OK.
i`m still studying so i may well be WAY-OFF the mark here ...but John says
>| Solution will entail two internet connections, a T1 and a DSL. Routing
> >will
> >| be configured such that priority traffic will use the T1 connection,
>and
> >| ordinary internet browsing will use the DSL connction.
?????
you would need to define "priority traffic" and then assign a high prioirty
queue ....then assign that to an interface.....assign the rest of the
traffic to another queue on the other (DSL) interface..
you know i think that`s the solution but i am begginging to doubt myself...i
swear i am missing something very basic and will be laughed at but hey......
i can always change my e-mail address...
best regards
steve
>From: "Chuck Larrieu"
>Reply-To: "Chuck Larrieu"
>To: [EMAIL PROTECTED]
>Subject: RE: Design Challenge - a bit off topic [7:195]
>Date: Wed, 11 Apr 2001 19:06:13 -0400
>
>My DE and I were practically rolling on the floor with this one.
>
>Rule number one: the customer is always right.
>
>Rule number two: when the customer's head is where the sun don't shine,
>refer to rule number one. ;->
>
>I agree with much of your assessment. Problem I have is that I work for a
>telco, and sometimes what we in the data side are given is the result of a
>telco account manager trying to meet T1 and DSL quota by making these kinds
>of suggestions. Gullible customers then latch on to what has been presented
>as a good idea. This RFI had all the markings of a telco-based solution.
>
>I do have a question for you, based on something you stated below:
>
>Recognizing that you have two outbound interfaces - T1 and DSL, how will
>custom queuing deliver the required packets to the appropriate interface?
>
>Chuck
>
>-----Original Message-----
>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
>Stephen Skinner
>Sent: Wednesday, April 11, 2001 2:55 AM
>To: [EMAIL PROTECTED]
>Subject: Re: Design Challenge - a bit off topic [7:195]
>
>Some interesting questions....
>
>me personally ....
>
>no-one has talked about restrictions of any sort ( a-la firewall)..so lets
>say there isn`t ....just use 1 of 16 different custom queues ...not really
>an effective tool fir this job but hey.....Design solutions it is ...
>
>I also don`t like the idea about this T1/DSL link stuff...i always advise
>customers to have the same....."if you want to have a SEEMLESS service
>don`t
>skimp ......all things should be equal".
>obviously it wont be totally seamless as you will have a lot of info going
>across 1 instead of 2 links...but it`s closer than DSL
>.....
>
>Questions for the customer??????
>
>would you like ME to design your network or would you like to do it
>yourself......being as i have years of experience and you have none...
>
>JUST SLIGHTLY MORE POLITELY...
>
>then i would convince the customer that my way was best and had loads of
>advantages and his way would lead to lots of scratching chins and "ohhh i
>wouldn't`t have done it that way...Boss" by support engineers from
>whichever
>company he gets to support him as i won`t be going anywhere near his
>network
>if he can`t be bothered to listen....
>
>AGAIN just more politely
>
>HTH
>
>steve
>
>P.S that is no joke ....i have had to TELL customers that before ...they
>just won`t listen.....and i do still have my job
>
>
>
> >From: "John Neiberger"
> >Reply-To: "John Neiberger"
> >To: [EMAIL PROTECTED]
> >Subject: Re: Design Challoenge - a bit off topic [7:195]
> >Date: Wed, 11 Apr 2001 02:45:45 -0400
> >
> >Thoughts inline below....
> >
> >| Howard's comment brings to mind a problem my Design Engineer raised
>when
> >| responding to a customer RFI.
> >|
> >| Howard's comment: . (Pause for usual mystification on why someone
>wants
> >| routing protocols to pass through
> >| a firewall, a fairly frequent question).
> >|
> >| The customer RFI stated requirement ( wording as best as I can
>remember
> >):
> >| Solution will entail two internet connections, a T1 and a DSL. Routing
> >will
> >| be configured such that priority traffic will use the T1 connection,
>and
> >| ordinary internet browsing will use the DSL connction.
> >|
> >| Lindy and I were having a real good laugh about the vagueness of the
> >| requirement, when we decided to try to come up with a solution. We
>came
> >up
> >| with a number of questions for the customer to elaborate upon, and a
> >| possible solution. Would anyone else care to use this as a test of
> >design
> >| issues?
> >|
> >| If memory serves, the customer defined "priority" traffic as e-mail
>and
> >| connectivity to a certain external web site.
> >|
> >| So:
> >|
> >| 1) what are some of the questions the customer still needs to |
> >answer?
> >
> >My first question to them would be "Do you really think that email and
>that
> >one website alone justify a full T-1, while the rest of the internet
> >traffic
> >for you company goes upstream on a measly DSL circuit?"
> >
> >Question #2: Do you desire some sort of fault-tolerance? Should one
> >circuit be able to take over in case of a failure on the other? If the
>T-1
> >fails and we move everything to the DSL circuit, do you care if we
> >completely squash the rest of your traffic if necessary to prioritize the
> >email and web traffic formerly on the T-1?
> >
> >Question #3: Do you really need a T-1? Could you get by with another
>DSL
> >circuit or a fractional T-1?
> >
> >|
> >| 2) What are some possible solutions to this requirement?
> >| ( assume the T1 and the DSL terminate on the same router )
> >|
> >
> >Question #4: Are these circuits coming from the same or different
> >providers? Do you have your own address space available? (silly
>question,
> >let's assume not ) If the answer is "different providers" then IP
> >address allocation and return-traffic paths become an issue. Let's say
> >that
> >Provider A (T-1) issues a /27 and Provider B issues a /28. If we NAT
> >internal addresses to only provider A's addresses--even for traffic
>leaving
> >toward Provider B--then all that return web traffic will come in on the
> >T-1,
> >which kinda violates the spirit of the requirements.
> >
> >[Actually, upon further reflection, this is an issue even if the circuits
> >are from the same provider. With two connections to the internet,
> >successfully manipulating traffic going both directions on both circuits
> >can
> >be tricky.]
> >
> >So then, how do you decide who to NAT to which addresses?
> >
> >One solution to that problem is to check out a Fatpipe Xtreme or a
>similar
> >product by Radware that handles a lot of this for you. Pretty cool
>stuff,
> >we'll be getting the Radware box in the near future for just this
>purpose.
> >
> >On another routing issue, it appears that there will be a very limited
> >number of destinations for traffic on the T-1 so one very simple solution
> >would be static routes pointing out the T-1 and a default route pointing
>to
> >the DSL circuit.
> >
> >Policy routing might also come in handy, I think, but it might be a
>bigger
> >hammer than is necessary. No need to complicate this if it doesn't need
>to
> >be complicated.
> >
> >Is any of that the sort of thing you're looking for? You keep catching
>me
> >late at night when I should be sleeping. I may not be thinking clearly
> >enough to answer this.
> >
> >Regards,
> >John
> >
> >
> >
> >
> >
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