Forwarding Rate and its association with the switch process
Can someone explain what the forwarding rate is and how to calculate it accurately?
One of my clients has asked me to choose between two switches and I want to choose the Cisco 3560, but the forwarding rate is lower. I need to be able to justify the purchase of the Cisco 3560 by refuting the importance of the forwarding rate or minimizing its impact on the switch process. Please help.
Here are the options he gave me:
The Linksys SRW2008MP is about $350 each. Forward rate is 11.9 Mpps.
The Cisco WS-C3560-8PC-S is almost $1,000 each. Forward rate is 2.7 Mpps
Re: Forwarding Rate and its association with the switch process
From http://www.cisco.com/en/US/products/hw/modules/ps2643/products_white_paper09186a0080091db8.shtml, "Line rate for Gigabit Ethernet (in packets per second [pps]) refers to the maximum number of 64-byte Ethernet frames that is transmitted out of the maximum possible bit rate of 1000 Mbps (Gigabit Ethernet). The line rate for Gigabit Ethernet is 1,488,100 pps.". Figure the total amount of bandwidth provided by all the device's ports, double if full duplex, scale accordingly (using the prior equation).
Although some devices can provide full line rate, seldom switches ever pushed that hard. More often price differences relate to features of the switch. For instance, the 3560 series is a L3 switch (performs routing), is manageable, and supports many other advanced features. I suspect the Linksys might just be a basic unmanaged L2 switch.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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