3935i LACP with same switch possible ?

  • 0
  • 1
  • Question
  • Updated 2 years ago
  • Answered

We are using 3935i APs

They are connected to only one port : I saw the LOW mode in the log

We would like to use it with performance: we have to use TWO ethernet ports

Is it possible with only one POE switch X440-48P

Thanks

Photo of Pascal Lurquin

Pascal Lurquin

  • 970 Points 500 badge 2x thumb

Posted 2 years ago

  • 0
  • 1
Photo of Narayanan, Karthikeyan

Narayanan, Karthikeyan, Employee

  • 912 Points 500 badge 2x thumb
Hi Pascal,

I dont think we can connect both LAN ports on the same switch. Please check the below article for more information:

https://gtacknowledge.extremenetworks.com/articles/Solution/AP3825-cannot-be-powered-when-connecting...

Regards,
Karthikeyan





.
Photo of Narayanan, Karthikeyan

Narayanan, Karthikeyan, Employee

  • 912 Points 500 badge 2x thumb
Hi Pascal,

If the Ethernet ports of the AP are connected to separate switches in a stack, then the switches in the stack can provide both POE and LAG functionality simultaneously to the AP.

Regards,
Karthikeyan
Photo of Ronald Dvorak

Ronald Dvorak, Embassador

  • 47,538 Points 20k badge 2x thumb
In case the KB article is correct and also is valid for the AP3935i then just turn PoE off on one switch port and configure the LAG and that should work.
Photo of Pascal Lurquin

Pascal Lurquin

  • 970 Points 500 badge 2x thumb
And If the customer have only one switch ...

Can we use an injector on the second port ? (strange ... but how can we have the Full power mode with one switch) ?
(Edited)
Photo of Ronald Dvorak

Ronald Dvorak, Embassador

  • 47,538 Points 20k badge 2x thumb
The switch could support 802.3at so you should be able to get full power from one port.
A think you run into the same issue as I did with another switch model - please take a look...

https://community.extremenetworks.com/extreme/topics/ap3935i-row-on-08h20g4-24p-ap-powered-by-af-ins...
Photo of Roy Noh

Roy Noh, Employee

  • 948 Points 500 badge 2x thumb
Actually, I tested this both with AP3825i and AP3935i few month ago.
It worked okay with AP3935i while AP3825i didn't as the above article.
AP3935i should be removed from the article I think.
I will check again and let you know later.
(Edited)
Photo of Roy Noh

Roy Noh, Employee

  • 948 Points 500 badge 2x thumb
Pascal,

Based on my lab, it is working fine with 3935i as below information.
I will ask the article creator to change details.
And please notice that I used fallback feature of LACP to ensure connection when AP is not set to use LACP so that you can change setting of the AP after all.

AP info


Switch info

* X440G2-12p-10G4.7 # show sharing
Load Sharing Monitor
Config    Current Agg     Min    Ld Share  Dist  Ld Share  Agg Link  Link Up
Master    Master  Control Active Algorithm Flags Group     Mbr State Transitions
================================================================================
     1      1     LACP       1    L2        A     1         Y     A      13
                                  L2              2         Y     A      10
================================================================================
Link State: A-Active, D-Disabled, R-Ready, NP-Port not present, L-Loopback
Minimum Active: (<) Group is down. # active links less than configured minimum
Load Sharing Algorithm: (L2) Layer 2 address based, (L3) Layer 3 address based
                        (L3_L4) Layer 3 address and Layer 4 port based
Distribution Flags:
    A - All: Distribute to all members,
    L - Local Slot: Distribute to members local to ingress slot,
    P - Port Lists: Distribute to per-slot configurable subset of members,
    R - Resilient Hashing enabled.
Number of load sharing trunks: 1
* X440G2-12p-10G4.8 # show lacp lag 1

Lag   Actor    Actor  Partner           Partner  Partner Agg   Actor           
      Sys-Pri  Key    MAC               Sys-Pri  Key     Count MAC             
--------------------------------------------------------------------------------
1           0  0x03e9 d8:84:66:57:cf:3b   65535  0x0011      2 00:04:96:9b:54:26

Port list:

Member     Port      Rx           Sel          Mux            Actor     Partner
Port       Priority  State        Logic        State          Flags     Port   
--------------------------------------------------------------------------------
1          0         Current      Selected     Collect-Dist   A-GSCD--  1       
2          0         Current      Selected     Collect-Dist   A-GSCD--  2       
================================================================================
Actor Flags: A-Activity, T-Timeout, G-Aggregation, S-Synchronization
             C-Collecting, D-Distributing, F-Defaulted, E-Expired

* X440G2-12p-10G4.9 # show inline-power info ports 1,2

Port  State           Class      Volts   Curr    Power     Fault
                                         (mA)   (Watts)
1     delivering      class4     54.0     15      0.800    None
2     delivering      class4     54.2    145      7.800    None

* X440G2-12p-10G4.10 #

Thank you.