Category: Quality of Service
AutoQos error while generating commands
First of all, the post isn’t about explaining QoS. Configuring AutoQos on Cisco switches should be very easy. At least, that is what all the Cisco documentation tells you. I always thought that the statements about configuration AutoQos were true, but a few days ago I would disagree. I was configuring multiple switches, Cisco Catalyst … Read More
PacketShaper Traffic Discovery and Citrix Session Reliability
While troubleshooting some performance issues with Citrix sessions between headquarters and sub locations, I decided to take a closer look at the PacketShaper. The PacketShaper is positioned at the headquarter and does outbound shaping to the sub locations. The PacketShaper is using older software (7.2x), which isn’t necessarily a problem. I deleted the class for … Read More
Configuration Example, Quality of Service
CB-WFQ Bandwidth Allocation
When configuring Quality of Service with CB-WFQ I am always puzzling to get the correct classes. When configuring CB-WFQ it is important to remember that the router does not allow the class queues to consume more than 75% of the total interface bandwidth. The remaining 25% are used for the default class as well as … Read More
Campus QoS Design Add-On
Yesterday I attended the QoS Design session and blogged on the subject. After posting the blog on the internet I received an e-mail about a statement in the blog. I placed the following statement on the blog: “Remember e-mail is NOT mission-critical.” In the e-mail I received the following comment on this statement. “What he … Read More
Campus QoS Design
What can somebody tell me about QoS after I passed the Cisco QoS (642-642) exam just one hour ago ?!?!?! ;-). A lot as I noticed from the session. When designing QoS SLA’s are very important. What are the required latency, jitter and data loss for the different applications, which traffic is really mission-critical and … Read More