From: Richard Dumoulin (richard.dumoulin@vanco.es)
Date: Wed Apr 28 2004 - 18:46:58 GMT-3
> Tim,
>
> Bc=CIR*Tc depends on the standpoint. For the lab most of the time it will
> be from the Cisco router's perspective. On a production network, if you
> talk to a frame relay provider then he may refer to the configuration of
> his own Passport.
>
> Regarding how to figure out the CIR on the exam, keep in mind the "TARGET
> rate" (sorry for the capitals). This is the speed at which the scenario
> author wants the router to shape the traffic at. Suppose you have a port
> speed at 256Kbps but the author says he wants the router to send packets
> at 64Kbps, then this is the CIR you'll have to configure.
>
> If it is not explicitly stated what the target rate is, then a word on the
> question may indicate it and you'll have to figure it out,
>
> HTH,
>
> --Richard
>
> -----Original Message-----
> From: ccie2be [mailto:ccie2be@nyc.rr.com <mailto:ccie2be@nyc.rr.com> ]
> Sent: miircoles, 28 de abril de 2004 22:14
> To: Group Study
> Subject: FRTS yet again - 2 (seemingly) simple questions
>
>
> Hi guys,
>
> By now, most of us have seen the equation Bc = CIR * Tc many, many times.
>
> My question is which cir is this, the cir provisioned by the service
> provider and is equal to mincir set on the router or the cir configured
> within the map-class frame-relay on the router?
>
> I have one more question:
>
> In the lab, assume you're told that the cir provisioned by the carrier is
> x. OK, we know to use that value for the mincir in our map-class. But,
> what wording or info do we look for to determine what value we should use
> for cir in our map-class?
>
> I've checked the GS archieves, cisco's web site, and various reference
> books and can't come up with a definitive answer. My thinking is that I
> should use the port speed, unless the remote site has a smaller port speed
> in which case I should use the remote's port speed, but I'm not 100% on
> this.
>
> Can someone take me through the proper thinking on this?
>
> Thanks in advanced, Tim
>
> _______________________________________________________________________
> Please help support GroupStudy by purchasing your study materials from:
> http://shop.groupstudy.com <http://shop.groupstudy.com>
>
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
> <http://www.groupstudy.com/list/CCIELab.html>
This archive was generated by hypermail 2.1.4 : Mon May 03 2004 - 19:48:57 GMT-3