Wireless Access

Reply
Occasional Contributor II
Posts: 17
Registered: ‎11-03-2010

LACP configuration values - which are required config entries

Hi,

I am trying to understand how to configure LACP between my company’s Aruba controllers and wired network switches, and have a few questions.

The ArubaOS 6.4 user guide says that the following values are used when configuring LACP on a group of ports.

  • LACP Group—The link aggregation group (LAG) number; range is 0 to 7
  • Mode—Active negotiation state or not in an active negotiation state indicated by the passive
  • Priority—The port priority value; range is 1 to 65535 Default 255
  • Timeout—Time out value for the LACP session; Long, the default, is 90 seconds; short is 3 seconds

As I understand it the first two values: (LACP Group & Mode) are defined manually when adding LACP the ports you wish to include in a LAG.

Example:

# Config t

# interface gigabitethernet 1/0

   lacp group 0 mode active

# write mem

# exit

The second two values: (Priority & Timeout) have a range of values that can be set, but also have defined default values.

Question:

Am I required to manually configure the Priority and Timeout values when I configure the ports, or is it acceptable to just add the single line lacp group and mode line to each interface? 

…If so my config would look like this:  (where no Priority and Timeout Values are seen in the config)  

 

interface gigbitethernet 1/0

description "GE1/0"

trusted vlan 1-4094

lacp group 0 mode active

!

interface gigbitethernet 1/1

description "GE1/1"

trusted vlan 1-4094

lacp group 0 mode active

!

Contributor I
Posts: 29
Registered: ‎04-02-2017

Re: LACP configuration values - which are required config entries

This should be fine. you dont need to change priority/timeout values unless they are required to be changed for some reason.

JayBee
ACDX | CCIE (RnS/SP,DC) | ACCP | ACMP | ACMA | JNCIS | JNCIA
If the provided solution resolves your issue, please mark it as accepted solution to help others.
Occasional Contributor II
Posts: 17
Registered: ‎11-03-2010

Re: LACP configuration values - which are required config entries

Thanks,

I appreciate the help I'm new to LACP and have seen several differing configurations that have me a little confused. Some are slightly different than the config I have suggested above and I'm wondering if they are wrong or if they represent a different type of config that I should consider.  Are any of the additional configurations shown below also correct?... and if so why are they so different?

------------------------------------------

A.)
interface gigbitethernet 1/0
    description "GE1/0"
    trusted vlan 1-4094
    lacp group 1 mode active
!

interface gigbitethernet 1/1
    description "GE1/1"
    trusted vlan 1-4094
    lacp group 1 mode active
!
------------------------------------------
B.)
interface port-channel 1
        trusted
        trusted vlan 1-4094
        switchport access vlan 3
        lacp group 1 mode active
!

interface gigabitethernet 1/0
        description "GE1/0"
        trusted
        trusted vlan 1-4094
        lacp group 1 mode active
!

interface gigabitethernet 1/1
        description "GE1/1"
        trusted
        trusted vlan 1-4094
        lacp group 1 mode active
!
------------------------------------------
C.)
interface port-channel 1
        add gigabitethernet 1/0
        add gigabitethernet 1/1
        trusted
        trusted vlan 1-4094
        switchport access vlan 3
        lacp group 1 mode active
!

interface gigabitethernet 1/0
        description "GE1/0"
        trusted
        trusted vlan 1-4094
        switchport access vlan 3
!

interface gigabitethernet 1/1
        description "GE1/1"
        trusted
        trusted vlan 1-4094
        switchport access vlan 3
!
------------------------------------------

 

I am also looking for clairification on the LACP configuration values below so I can explain them to my wired networking team:

 

1.) Priority: The port priority value; range is 1 to 65535 Default 255 (The higher the value number the lower the priority)

        Q:  Can you explain what this value does and explain why I would change it to something other that its defaul setting?

 

2.) Timeout—Time:  amount of time that a port-channel interface waits for a LACPDU from the remote system before terminating the LACP session.  Values: Default = Long and is 90 seconds; short is 3 seconds
    
         Q:  Can you explain a circumstance where I might want to set this value to short instead of the default.

Search Airheads
Showing results for 
Search instead for 
Did you mean: