From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Tue Mar 13 2007 - 00:18:08 ART
Traffic will be shaped irrespective of interface congestion. This is very
simple to test. Just set the CIR value to a really low number and ping
across. Then use the "show traffic-shape statistics" to verify the shaping.
--Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) bdennis@internetworkexpert.com Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 Direct: 775-745-6404 (Outside the US and Canada)
On 3/12/07 7:00 PM, "Jim" <firstnamejim@gmail.com> wrote:
> Hi all, > > I have a fairly fundamental question: does frame-relay traffic shaping work > when there is no interface congestion? > > A task was asking to configure traffic shaping between R2 & R4. Routers R1, > R2, R3 & R4 are in a full mesh configuration with inverse-arp turned on. > Here is the configurations: > > R1: > interface Serial0/0 > ip address 132.1.0.1 255.255.255.0 > encapsulation frame-relay > end > Rack1R1# sho frame map | in dlci > Serial0/0 (up): ip 132.1.0.2 dlci 102(0x66,0x1860), dynamic, > Serial0/0 (up): ip 132.1.0.3 dlci 103(0x67,0x1870), dynamic, > Serial0/0 (up): ip 132.1.0.4 dlci 104(0x68,0x1880), dynamic, > ############################ > R2: > interface Serial0/0 > ip address 132.1.0.2 255.255.255.0 > encapsulation frame-relay > no fair-queue > end > Rack1R2#sh frame map | in dlci > Serial0/0 (up): ip 132.1.0.1 dlci 201(0xC9,0x3090), dynamic, > Serial0/0 (up): ip 132.1.0.3 dlci 203(0xCB,0x30B0), dynamic, > Serial0/0 (up): ip 132.1.0.4 dlci 204(0xCC,0x30C0), dynamic, > ############################ > R3: > interface Serial0/0 > ip address 132.1.0.3 255.255.255.0 > encapsulation frame-relay > end > Rack1R3#sho frame map | in dlci > Serial0/0 (up): ip 132.1.0.1 dlci 301(0x12D,0x48D0), dynamic, > Serial0/0 (up): ip 132.1.0.2 dlci 302(0x12E,0x48E0), dynamic, > Serial0/0 (up): ip 132.1.0.4 dlci 304(0x130,0x4C00), dynamic, > ############################ > R4: > interface Serial0/0 > ip address 132.1.0.4 255.255.255.0 > encapsulation frame-relay > end > Rack1R4(config)#do sho frame map | in dlci > Serial0/0 (up): ip 132.1.0.1 dlci 401(0x191,0x6410), dynamic, > Serial0/0 (up): ip 132.1.0.2 dlci 402(0x192,0x6420), dynamic, > Serial0/0 (up): ip 132.1.0.3 dlci 403(0x193,0x6430), dynamic, > > The port speed is 512kbps for R2 & R4, need to have: > - R2 use cir 128kbps for dlci204, use 50% of remaining for other DLCIs > - R4 use cir 128kbps for dlci402, use 50% of remaining for other DLCIs > - make sure R2 & R4 should burst above the provisioned CIR under no > circumstances for DLCI204 and DLCI402 > > My question is: I know that we can use cir to limit the outbound traffic, > but does it still work if the interface is not full? In other words, could > the DLCI 204 use more than 128kbps when there is no congestion? Or do I > need to add a policer? > > I had this configuration in mind: > #R2: > int s 0/0 > frame traffic-shaping > frame class other > frame inter 204 > class dlci204 > policy-map dlci204 > class class-default > police 128000 > map-class frame dlci204 > frame cir 128000 > frame bc 1280 > service-policy output dlci204 > map-class frame other > frame cir 192000 > frame bc 24000 > > #R4 > int s 0/0 > frame traffic-shaping > frame class other > frame inter 402 > class dlci402 > policy-map dlci402 > class class-default > police 128000 > map-class frame dlci402 > frame cir 128000 > frame bc 1280 > service-policy out dlci402 > map-class frame other > frame cir 192000 > frame bc 24000 > > Your comments are greatly appreciated. > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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