Hi Ivan, Your configuration is ok,But I want want to stress that when you configure "Bandwidth" command under class-map you achieve CBWFQ and When u are configuring "Priority" command under class-map you are achieving LLQ.
As you might know that both this method are congestion management Technique i.e your defined traffic will be limited to 80kbps only when the network encounters congestion and is under congestive state (other wise it may go upto 128kbps ur CIR).. If your intention is to always limit the defined traffic to 80kbps use Rate-Limiting. So please ensure that you are simulating congestion in ur setup to verify CBWFQ & LLQ.How much traffic are u pumping per sec to simulate congestion ? Kind Regards /Thangavel -----Original Message----- From: Ivan Yip [mailto:[EMAIL PROTECTED]] Sent: Friday, December 27, 2002 12:06 PM To: [EMAIL PROTECTED] Subject: FR Low Latency Queuing (LLQ) [7:59820] Hi, I would like to configure QoS by using FR LLQ. I have the following network test lab. pc1 ------| ---router1----FR network-----router---- FTP server pc2-------| I want to test the LLQ feature, ie, fixed bandwidth allocated to certain taffic. I tested with the following steps 1. upload from pc2 to FTP server to make the FR PVC congested. 2. then upload from pc1 to FTP server If no qos defined, the bandwidth will roughly equally shared. (This was tested and OK) 3. Then I define the LLQ on router1 to guarantee the bandwidth from PC1 by 'bandwidth' or 'priority' and test ftp upload again. Configuration is below: class-map match-all 1 match access-group 20 policy-map 1 class 1 bandwidth 80 or priority 80 (** define 80k to this policy) interface Serial0/0 bandwidth 128 no ip address encapsulation frame-relay IETF load-interval 30 no fair-queue frame-relay traffic-shaping frame-relay lmi-type ansi ! interface Serial0/0.1 point-to-point bandwidth 128 ip address 10.114.0.14 255.255.255.252 frame-relay interface-dlci 200 class llq1 map-class frame-relay llq1 frame-relay traffic-rate 128000 128000 no frame-relay adaptive-shaping frame-relay cir 128000 frame-relay bc 1280 frame-relay be 0 frame-relay mincir 128000 service-policy output 1 access-list 20 permit 192.168.10.2 (ip address of pc1) However, when I use 'bandwidth 80', I found the average throughput from pc1 will have around 80k but the traffic rate is vary from time to time. (somtimes 100k and sometimes 50k). Why? Even worse, if I use 'priority 80', the traffic from pc1 can only have average around 30k during link congestion. Why? Also, the ping delay from pc1 to router2 and pc2 to router2 are almost equal (either bandwidth or priority). I expected that the ping from pc1 will get better response as the bandwidth was guaranteed. Anyone can give me some hints on above questions? Thanks in advance. rgds, ivan **************************Disclaimer************************************************** Information contained in this E-MAIL being proprietary to Wipro Limited is 'privileged' and 'confidential' and intended for use only by the individual or entity to which it is addressed. You are notified that any use, copying or dissemination of the information contained in the E-MAIL in any manner whatsoever is strictly prohibited. **************************************************************************************** Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=59826&t=59820 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
