Re: How to determine CIR and increase CIR of FR? [7:259]
Frame-relay traffic shaping -- Jason Roysdon, CCNP+Security/CCDP, MCSE, CNA, Network+, A+ List email: [EMAIL PROTECTED] Homepage: http://jason.artoo.net/ ""Stephen Skinner"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > 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 inputI.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 th
RE: How to determine CIR and increase CIR of FR? [7:259]
A situation that I have run across is where you have a port speed that is 4 times your CIR and your carrier cuts you off at the egress port for all packets over twice your CIR. -Original Message- From: EA Louie [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 2:22 PM To: [EMAIL PROTECTED] Subject: Re: How to determine CIR and increase CIR of FR? [7:259] 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 inputI.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 po
Re: How to determine CIR and increase CIR of FR? [7:259]
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 inputI.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, > &
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 inputI.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:[E
Re: How to determine CIR and increase CIR of FR? [7:259]
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 - > > > > > > > >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 2 usec, > > > > reliability 255/255, txload 2/255, rxload 2/255 > > > > Encapsulation FRAME-RELAY IE
