Tag Archives: QOS

Application Based Bandwidth shaping in Cisco ROuter and switches.

Cisco IOS Implementations Cisco IOS implements policing/marking functionality with two unrelated mechanisms: The rate-limit command implements per-interface input- and output-rate limiting. The police command implements the traffic measurement within the scope of the Modular QoS Command Line Interface (MQC). Rate-limit commands and QoS policy-maps containing the police command can measure inbound or outbound packets on physical or logical interfaces (tunnels, subinterfaces). They introduce no delay (apart from… Read More »

Bandwidth Limiting / Shaping on Cisco Switch or Router Port.

When Internet Service Providers (ISP) gives a new internet link , very often they have shaping rules on their router to regulate internet traffic at promised rate. If your firewall/router/switch is sending more excessive traffic than promised rate, the packet will be dropped by ISP router, then ends up with suboptimal performance and slow internet speed. in this… Read More »

Cisco 2960 Switch Series: Rate limit Configuration on the Switch Port.

In the Cisco IOS on a Catalyst switch (not on a router), there’s an Interface Mode command called shape round-robin queue bandwidth. More specifically, the command is srr-queue bandwidth. This command has been around since IOS 12.2(25). For these examples, I’m using a Cisco Catalyst 2960 switch. Entering the command appended with a question mark will display the command options. Here’s… Read More »