Solved

I am setting up a new Cisco 3750 and need guidance on creating port-channel/etherchannel

Posted on 2014-01-27
2
2,746 Views
Last Modified: 2014-02-03
Hello EE,
I have a new 3750 and want to create a Port Channel and add a few switch ports to it.
Can somebody guide me on how to do this?  I see one that has a (D) but looking at mine I have Po6(SU) with Te1/1/1(P) and Te3/1/2(P) that I want to create identically in my new switch?
0
Comment
Question by:bergquistcompany
2 Comments
 
LVL 45

Accepted Solution

by:
Craig Beck earned 500 total points
ID: 39813762
You should create the PortChannel interface first.  This is a virtual interface which will govern the physical interface configuration.

So, if you want a PortChannel which is configured to carry a single VLAN you'd do this...

interface Po2
 switchport
 switchport mode access
 switchport access vlan 10
!
interface range Te1/1/1 , Te3/1/2
 switchport
 switchport mode access
 switchport access vlan 10
 channel-group 2 mode active
!

Open in new window

This would put ports Te1/1/1 and Te3/1/2 in Po1 and allow VLAN10.

For a trunk you'd do something like this...

interface Po2
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport trunk allowed vlan 10,30,50
 switchport trunk native vlan 100
!
interface range Te1/1/1 , Te3/1/2
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport trunk allowed vlan 10,30,50
 switchport trunk native vlan 100
 channel-group 2 mode active
!

Open in new window


Note that the PortChannel interface number is the number you configure in the channel-group command in the physical interfaces.

When changing the configuration, adjust the PortChannel interface and the changes will filter down to the physical interfaces which form that PortChannel.

The channel-group command can use several modes.  These are:

active - enables LACP unconditionally
passive - enables LACP if an LACP device is detected
desirable - enables PAgP unconditionally
auto - enables PAgP if a PAgP device is detected
on - creates a static EtherChannel

You can use active/passive, or desirable/auto, active/active, auto/auto or on/on.

So, on one end of the link you might want to tell the switch to use PAgP no matter what.  That end would use channel-group 2 mode desirable.  The other end could use either auto or desirable, but not active, passive or on.

Make sense?
0
 

Author Closing Comment

by:bergquistcompany
ID: 39831328
great details
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
adding a printer to QAD 10 62
Can't connect to WAMP server 5 49
eigrp routing loop 5 39
Trouble enabling network for Hyper-V client 10 31
This is an article about my experiences with remote access to my clients (so that I may serve them) and eventually to my home office system via Radmin Remote Control. I have been using remote access for over 10 years and have been improving my metho…
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

786 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question