Stephen - I can think of a few ways to throttle down, but they're all
access-list related, and not actual interface speed related. For example, I
can't actually turn down the speed of an Ethernet interface, because it is
fixed at 10Mbps. Can I funnel the traffic that comes into/goes out of that
interface? Yes, but not deterministically, only as a function of traffic
shaping/limiting.
On a serial interface, they are clocked to synchronize point-to-point, so
there is not physical throttling option there, either.
The question that would need to be answered is, "Why would one want to limit
the data rate on a given interface?" When a good answer to that question
comes up, then we'll investigate how to do it.
-e-
----- Original Message -----
From: "Stephen Skinner"
To:
Sent: Thursday, April 12, 2001 3:17 AM
Subject: Re: How to determine CIR and increase CIR of FR? [7:259]
> OK..
>
> it appears i was wrong on this Bandwidth thing.....
>
> my appologies and thanks for everyone putting me on the right path....
>
> BTW
>
> ????is there any way of controlling the speed of your input....I.E
> throttleing down .........
>
> Best regards
>
> steve
>
> thanks snyway
> >From: "EA Louie"
> >Reply-To: "EA Louie"
> >To: [EMAIL PROTECTED]
> >Subject: Re: How to determine CIR and increase CIR of FR? [7:259]
> >Date: Wed, 11 Apr 2001 16:35:00 -0400
> >
> >No one indicated that you were wrong. However, more clarity would be to
> >answer all the question(s) completely.
> >
> >-e-
> >
> >----- Original Message -----
> >From: "Stephen Skinner"
> >To: ;
> >Sent: Wednesday, April 11, 2001 1:52 AM
> >Subject: Re: How to determine CIR and increase CIR of FR?
> >
> >
> > > i don`t mean to be rude ,but i was essential correct..
> > >
> > > if you set the bandwidth command to 64k and you have a CIR of 128K yo
> >will
> > > only get 64K...But as my good friends have pointed out the default is
> > > 1.544kb......but i was just trying to make that point stand out that
> >it`s
> > > the serivce provider who makes the call about the info rate...
> > >
> >Baloney. You'll still get minimally 128k. Thus, if you set
> >interface serial 0
> > bandwidth 64000
> >
> >and you have a CIR of 128k, you will still get 128k (plus bursts up to
the
> >data rate of the frame relay port). The bandwidth command does *nothing
> >physically limiting* to the interface. It merely acts as the reference
> >number for load calculations on show interfaces and for the metric
> >calculation for dynamic routing protocols. The txload and rxload
fractions
> >will be inaccurate, though, with this configuration.
> >
> > > I`m sorry if i`m bieng ANAL about this i just wanted myself to be
> >clear..
> > >
> > > best regards
> > >
> > > steve
> > >
> > >
> > > >From: "EA Louie"
> > > >Reply-To: "EA Louie"
> > > >To:
> > > >Subject: Re: How to determine CIR and increase CIR of FR?
> > > >Date: Mon, 9 Apr 2001 08:16:49 -0700
> > > >
> > > >ohhh no.... the bandwidth statement in the interface is *manually*
> >entered
> > > >(defaulted at 1544 Kbit for a serial interface), and is used to
> >calculate:
> > > >1. metrics for routing protocols, and
> > > >2. bandwidth utilization in the "show interfaces" display
> > > >so it's important to have it set correctly.
> > > >
> > > >Some frame relay carriers (Sprint and PacBell come to mind) do not
> >transmit
> > > >their CIR, so 'show frame-relay map' doesn't display their CIR.
> > > >
> > > >The frame relay provider does need to be contacted to increase CIR.
> >Higher
> > > >CIR usually translates into a cost increase for the circuit.
> > > >
> > > >Here's an explanation of EIR - also see
> > > >http://www.nwfusion.com/newsletters/frame/1108fr2.html and
> > > >http://www.nwfusion.com/newsletters/frame/1206fr1.html
> > > >
> > > >EIR is the difference between the port speed of the frame relay
service
> >and
> > > >the CIR. The port speed is set by the frame relay service provider,
> >and
> > > >may
> > > >be lower than the maximum interface speed - for example, on a T-1
> >circuit,
> > > >the provider could provide a 384kbps port and a 128k CIR. In this
> >case,
> > > >the
> > > >EIR = 256k, and it would be wise to set the interface bandwidth to
384k
> > > >(bandwidth 384 on the serial interface) to match the port speed. And
> >the
> > > >port speed is usually the maximum rate at which one can oversubscribe
> >the
> > > >PVC (that is, it is usually the frame relay burst rate)
> > > >
> > > >The moral of the story - just because there is an *access circuit* at
a
> > > >particular transmission rate does not assure you that you burst at
that
> > > >rate. The interface is rate-limited to the port speed that was
ordered
> > > >from
> > > >the frame relay carrier.
> > > >
> > > >-e-
> > > >----- Original Message -----
> > > >From:
> > > >To: Greg Owens
> > > >Cc: ;
> > > >Sent: Monday, April 09, 2001 6:55 AM
> > > >Subject: Re: RE: How to determine CIR and increase CIR of FR?
> > > >
> > > >
> > > > > Are you sure that information isn't just taken from the
"bandwidth"
> > > >statements on the subinterfaces?
> > > > >
> > > > >
> > > > > Greg Owens wrote:
> > > > > > Sh frame map will show u the CIR
> > > > >
> > > > > -----Original Message-----
> > > > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf
> >Of
> > > > > Stephen Skinner
> > > > > Sent: Monday, April 09, 2001 7:45 AM
> > > > > To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> > > > > Subject: Re: How to determine CIR and increase CIR of FR?
> > > > >
> > > > > your CIR (Committed information rate) is supplied by your SP
...you
> >and
> > > >him
> > > > > agree how much you can have( depending on how much you pay)
> > > > > usually ....the person setting up your router sets the "BANDWIDTH"
> > > >command
> > > > > to the CIR+ BR (burst rate) I.E how high you CAN go up to for a
> >limited
> > > > > amount of time ......again your service provider has set this for
> >you
> > > >.....
> > > > >
> > > > > HTH
> > > > >
> > > > > steve
> > > > >
> > > > >
> > > > > >From: "David Gollop"
> > > > > >Reply-To: "David Gollop"
> > > > > >To: [EMAIL PROTECTED]
> > > > > >Subject: How to determine CIR and increase CIR of FR?
> > > > > >Date: Mon, 09 Apr 2001 10:29:40 -0000
> > > > > >
> > > > > >Hi.. How to determine the CIR of a frame relay line? Like
Result
> > > >shown
> > > > > >below, what is the CIR? How do I increase the CIR? Do we have
to
> > > >contact
> > > > > >the Frame relay provider? What is the difference between CIR and
> >EIR??
> > > > > >
> > > > > >
> > > > > >SIN01#sh int s1/1.19
> > > > > >Serial1/1.19 is up, line protocol is up
> > > > > > Hardware is M4T
> > > > > > Description: --- Connects to JKT01 Ser0.2 ---
> > > > > > Internet address is 50.200.243.25/30
> > > > > > MTU 1500 bytes, BW 2048 Kbit, DLY 20000 usec,
> > > > > > reliability 255/255, txload 2/255, rxload 2/255
> > > > > > Encapsulation FRAME-RELAY IETF
> > > > >
> > > >
> >
>_________________________________________________________________________
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> > > > >
> > >
> >
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