Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

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

Posted on 2014-01-27
2
Medium Priority
?
3,213 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 47

Accepted Solution

by:
Craig Beck earned 2000 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

Fill in the form and get your FREE NFR key NOW!

Veeam® is happy to provide a FREE NFR server license to certified engineers, trainers, and bloggers.  It allows for the non‑production use of Veeam Agent for Microsoft Windows. This license is valid for five workstations and two servers.

Question has a verified solution.

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

For many of us, the  holiday season kindles the natural urge to give back to our friends, family members and communities. While it's easy for friends to notice the impact of such deeds, understanding the contributions of businesses and enterprises i…
Make the most of your online learning experience.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…

721 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