Ether-Channel Bundeling & Encapsulation.

Unanswered Question
Mar 28th, 2009

Hello everybody,

Please confirm how many links can be bundled with Ether-Channel. Is there any limit for the same.

Second, Can anyone please share what is the purpose of "encapsulation" terminolgy i.e dot1q or any other. What exactly the role of these encapusulations.



I have this problem too.
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lamav Sat, 03/28/2009 - 11:34

You can bundle up to 8 physical ethernet ports to form an etherchannel. The ports can be ethernet, fast ethernet, gigabit ethernet or 10-gigabit ethernet.

Packets get encapsulated so that they can be put on a network that supports a certain technology. A packet that will traverse an ethernet network will be encapsulated in an ethernet protocol packet. A packet that will be placed on a point-to-point link will be encapsulated with either PPP or HDLC. A packet that will traverse a frame-relay network will get encapsulated in a frame relay packet.

There is protocol-specific information in the header of the packet that the network uses to forward the packet, such as source and destination addresses, protocol-type, length, etc. .

You really should read a basic CCNA-type book to understand this because this is something that is very fundamental.



rpfinneran Sun, 03/29/2009 - 03:12

One thing to add, all ports in the etherchannel must be the same speed. You cannot, for example, bundle a GigabitEthernet interface running at 1000Mbs with a FastEthernet.




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