The musings of an IT Consultant

Jul 31 2009   8:32PM GMT

Aggregating links on Cisco switches

Raj Perumal Raj Perumal Profile: Raj Perumal

Hello again folks! So you’ve just recently got your purchase approved for a brand new set of switches and you want to find a way to increase your throughput. What do you do? You aggregate links of course!

Aggregating links is a common thing done on high end switches such as Cisco or HP switches to name a few. The idea behind it is to take two or more ports and bind them together to create a single virtual port that connects to another switch. Then you can take your traffic and shuttle it over this link.

In Cisco land this is called Etherchannel. When you create an Etherchannel, it is treated like an interface. People will commonly create Etherchannels and then trunk their vlans across this link. This allows for quite a bit of bandwidth, especially on gigabit switches. This doesn’t double your bandwidth but it does increase it by a fair bit.

You can read more about etherchannel here.


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