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What I am looking for is like Jumping battery of other car instructions:<br />
<br />
if I grab 2 cables and connect them to both switches ,before configuring the ports as etherchannel, it might cause a loop, though STP can prevent it.<br />
Before cable connections between switches, I need to configure both ports on each switch as etherchannel , then plug the cables one at a time on each port...<br />
looking for safest way to avoid the loop
</div>


What I am looking for is like Jumping battery of other car instructions:

if I grab 2 cables and connect them to both switches ,before configuring the ports as etherchannel, it might cause a loop, though STP can prevent it.
Before cable connections between switches, I need to configure both ports on each switch as etherchannel , then plug the cables one at a time on each port...
looking for safest way to avoid the loop

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Thanks I will get back to this later
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<div class="content wysiwyg-content">
I would like to know which precautions should be taken before configuring an Etherchannel on an existing switch .<br />
<br />
The Existing Switch is connected to other switches as well.<br />
I do not want to cause a loop or any other mishaps.<br />
<br />
Thank you
</div>
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I would like to know which precautions should be taken before configuring an Etherchannel on an existing switch .

The Existing Switch is connected to other switches as well.
I do not want to cause a loop or any other mishaps.

Thank you

Configuring Etherchannel on an Existing switch

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.