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Ether-Channel Bundeling & Encapsulation.

cisco.net
Level 1
Level 1

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.

regards

Jimmy

2 Replies 2

lamav
Level 8
Level 8

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.

HTH

Victor

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.

HTH,

Ryan

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