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New Member

performance of switch and router

i am confused the different between switching capacity and forwarding rate ( performance of CE500 show at this link http://www.cisco.com/en/US/products/ps6545/products_data_sheet0900aecd80322aeb.html ), and In some data sheet such as router 1841, they say that the performance of 1841 is wire-speed performance, can anyone help to explain something about this.

Thanks.

3 REPLIES
New Member

Re: performance of switch and router

Hi

A device which is capable of transmitting traffic without slowing it down is said to work at wire-speed. That is that the processing by the device is not adding delay to normal trasmit speed.

Switch Fabric interconnects the various components of the networking device. For eg. Line cards,forwarding engine etc. The capacity is measure in Mbps or Gbps.

Forwarding Engine inspects packet headers; Determines outgoing line card of a packet; Rewrites the header. The capacity is measured in Mpps or Kpps.

Data rate is the total number of Megabits-per-second (Mbps) that a networking element can handle.

Packet rate is the number of million-packets-per-sec

(Mpps) that the networking element can handle. The relation between the data rate and packet rate is simple:

Packet rate (Mpps) = Data rate (Mbps)/ 8* packet size

I think the packet size normally taken by Cisco is 64 Bytes.

New Member

Re: performance of switch and router

thanks.

Re: performance of switch and router

hi,,,

normally switch is having capacity process millions of packet per second where router having capacity to process thaousand of packets per second...as switches are using ASIC they are providing fast processing and switching action...

rate this post if it helps

regards

Devang

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