<div>
&quot;Switchport mode trunk&quot; will put the port in trunking mode. &nbsp;<br />
<br />
Etherchannel can be used with trunking ports.
</div>


"Switchport mode trunk" will put the port in trunking mode.  

Etherchannel can be used with trunking ports.

<div>
For 3850, it is using NM module with 4 SFP ports.
</div>


For 3850, it is using NM module with 4 SFP ports.

<div>
Doesn't matter. &nbsp;Same command regardless of the module.
</div>


Doesn't matter.  Same command regardless of the module.

<div>
Hi Don,<br />
<br />
Please show step by step, with all the commands involved... thanks.
</div>


Hi Don,

Please show step by step, with all the commands involved... thanks.

<div>
<blockquote>
with all the commands involved
</blockquote>
<br />
Do you mean from not even being connected? Do you know how to log in to the switch? Get to privileged mode? Global config mode?
</div>


> with all the commands involved


Do you mean from not even being connected? Do you know how to log in to the switch? Get to privileged mode? Global config mode?

<div>
Hi Don,<br />
<br />
Is connected and managed to logged in, and I know the privileged and config mode. Please show only how to form the trunking on the interface.
</div>


Hi Don,

Is connected and managed to logged in, and I know the privileged and config mode. Please show only how to form the trunking on the interface.

<div>
The given command put the link in trunk. However, the gigabit1/1/1 to 4 can not be used. Use TE1/1/1 to 4 instead.
</div>


The given command put the link in trunk. However, the gigabit1/1/1 to 4 can not be used. Use TE1/1/1 to 4 instead.

<div>
<div class="content wysiwyg-content">
This is using 3 pcs of Cisco catalyst switch 3850-48, forms a stack. A Cisco Catalyst switch 3750 with sfp ports are used as core switch. However, when I tried to form a trunk between 3850 stack and 3750, I failed. Please help to show the correct way to form the trunk in steps. I found some forums state that you have to use etherchannel on top of the trunk, is this true?<br />
<br />
thanks in advance.
</div>
</div>


This is using 3 pcs of Cisco catalyst switch 3850-48, forms a stack. A Cisco Catalyst switch 3750 with sfp ports are used as core switch. However, when I tried to form a trunk between 3850 stack and 3750, I failed. Please help to show the correct way to form the trunk in steps. I found some forums state that you have to use etherchannel on top of the trunk, is this true?

thanks in advance.

How to trunk 3850 and 3750?

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

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.