CBWFQing is a rough and ready approach which DOES work statistically over a large enough sample time.
You have to understand that it only starts to work when there is congestion on the link. Using your example, IIRC, when there is > 50% of DLSW traffic and > 25% of IP traffic, then, the DLSW traffic gets 50% of the 75%, the IP gets 25% of the 75% And any excess is split so - the excess DLSW gets an additional 75% of the remaining 25% And IP gets an additional 25% of the remaining 25% when both traffic streams require more than their allocation. To get round this, either use the max-reserve red bandwidth stuff or enable fair queuing for the default class (I cannot remember if it is enabled automatically) by changing your policy map to - policy-map shape class DLSW bandwidth percent 50 class IP bandwidth percent 25 class-default fair-queue That is my understanding anyway! Best regards, Dom Stocqueler SysDom Technologies -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mark Pruitte Sent: 29 May 2003 21:09 To: [EMAIL PROTECTED] Subject: CBWFQ and Bandwidth Percentage [7:69823] Here is a question to which I have not been able to find a definitive answer. Assume the following. In a default configuration, you are asked to configure DLSW for 50% of the interfaces bandwidth, IP traffic should receive 25% of the interface bandwidth, and all other traffic should use the remaining 25%. Given the fact that CBWFQ by default only uses 75% of the interface bandwidth unless you configure the max-reserved-bandwidth x%, if you put the following configuration onto the interface, what percentages of the interfaces's bandwidth are you actually allocating? policy-map shape class DLSW bandwidth percent 50 class IP bandwidth percent 25 If you do not issue the max-reserved-bandwidth command, have you only allocated 75% of the default 75% available to CBWFQ or have you actually met the requirements of the task? ------------------------------------------------------------------------ ------ Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you. ======================================================================== ====== Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=69835&t=69823 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
