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Link Aggregation on Unifi Switch

Hi There - Not a networking specialist but understand the basics and comfortable using the GUI.

 

I have a UniFi Switch 24 POE-250W with the latest firmware 3.8.6.6650, and have a Cisco WAP571 with firmware 1.0.1.10.

 

The WAP has two 1GB Lan ports and by default (and it seems hardwired that Link Aggregation) - can not uncheck in GUI. The documentation states

"The WAP571/E always bundled the two Eth0 and Eth1 to be link aggregation mode. The link partner must also support link aggregation."

 

However when both plugged in, the WAP works but constantly drops pings and many client do not recieve IP address. When i aggregate the ports on the switch, i can not even ping the Wireless AP.

 

When i disable one port (or have only one cable connected) the Wireles AP connects perfectly and zero drops.

 

I have tried using aggregation with DHCP or staticly assigned IP address, either on the AP or the switch or on both devices (WAP and Switch) however none of them seem to be working. Tried restarting switch after any change all to no avail.

 

 

Would really like someone to help to understand what settings are required on the switch.

 

my first post and not a network engineer so please be nice. have tried searching many forums and not found any answers, have come across this issue with lots of synology devices too in the forums, and thats my next step but want to fix this before i add the next devices that requires link aggregation/bonding.

 

 

 

 

 


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Ubiquiti Employee
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Re: Link Aggregation on Unifi Switch

LACP is the only aggregation option currently on UniFi switches (and is generally always what you want to use, odd the AP doesn't support it). 

 

Static LAG isn't currently supported, add a kudo here if it's of interest. 

https://community.ubnt.com/t5/UniFi-Routing-Switching-Feature/Static-LAG-support/idi-p/1773079

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Emerging Member
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Registered: ‎02-20-2017
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Re: Link Aggregation on Unifi Switch

To create a LAG on the unfi switch go to the controller find the Switch in the device menu then click it under properties go to "advanced options" and set the port as an Aggregate port it will then allow you to enter the next port to Aggregate it with, im sure on the unifi Line of Access points that supports LAG you have to actually enable it in the access point.

New Member
Posts: 7
Registered: ‎02-07-2017

Re: Link Aggregation on Unifi Switch

i have tried the aggregate port option under the advanced settings, and as i mentioned earlier that simply stops the cisco WAP from working altogether.
the wap i am using is a cisco one, not a unify one.
Established Member
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Registered: ‎02-18-2017
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Re: Link Aggregation on Unifi Switch

This document https://supportforums.cisco.com/document/81681/lag-link-aggregation would suggest you need to alter some settings in the WAP571 to make the LAG work. 

 

 

New Member
Posts: 7
Registered: ‎02-07-2017

Re: Link Aggregation on Unifi Switch

Hi there, thank you for the response. This document reffers to a controller, however the WAP571 do not require a controller and simply can operate as individuals or as cluster (without a controller).

 

Am i missing something?

 

See below of the only settings available on the port on the WAP

wap571.png

New Member
Posts: 7
Registered: ‎02-07-2017

Re: Link Aggregation on Unifi Switch

Hi Community - Hope you can help, i believe i have found out what needs to be done on the switch but dont know how to do it.

https://www.bhphotovideo.com/c/product/1234188-REG/cisco_wap571_a_k9.html (in the review section)

NOTE** there is one piece of setup information that was hard to find. When setting up the LAG on the switch you must not use LACP and you must set the flow control to Administrative ON all the time. If you do these to steps then LAG works flawlessly.

 

So the question is how do i set the flow control to Administrative ON and not use LACP?

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Re: Link Aggregation on Unifi Switch

This appears to be a Cisco thing. LACP is LAG. I suspect the reviewer was utterly clueless and couldn't make the LAG work so they did the same thing you did, switch off LAG (LACP) and it worked. As indeed, it works for you.

 

Just purely as as a matter of interest, what is the WAP capable of that will max out a single 1GbE connection that makes so keen on having the AP running in LAG?

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Re: Link Aggregation on Unifi Switch

LACP is the only aggregation option currently on UniFi switches (and is generally always what you want to use, odd the AP doesn't support it). 

 

Static LAG isn't currently supported, add a kudo here if it's of interest. 

https://community.ubnt.com/t5/UniFi-Routing-Switching-Feature/Static-LAG-support/idi-p/1773079

New Member
Posts: 7
Registered: ‎02-07-2017

Re: Link Aggregation on Unifi Switch

Thank you. Have added kudos as suggested and will look for other APs.

 

Do you know if UAP-AC-HD wireless aps support LACP?

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Re: Link Aggregation on Unifi Switch


@zishansheikh wrote:

 

Do you know if UAP-AC-HD wireless aps support LACP?


Picture worth a thousand words. "Yes" is the only one you need though. Man Happy

 

Topology view in controller from part of my home office network.

 

Selection_630.png

 

Both AC-HD and AC-SHD (currently in beta store, though sold out currently) support LACP. 

New Member
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Registered: ‎02-07-2017

Re: Link Aggregation on Unifi Switch

https://www.cisco.com/c/en/us/products/wireless/wap571-wireless-ac-n-premium-dual-radio-access-point...


The spec is very similar to the US-Pro-HD, i wish i had purchased these, but was happy with the previous cisco WAP371, and was very happy with the UI and preformance.

What would you suggest in terms of getting the two ports to work?
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Registered: ‎04-10-2017

Re: Link Aggregation on Unifi Switch

Hi, could you please let me know how you generated the graphic?

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Re: Link Aggregation on Unifi Switch


@andrevs wrote:

Hi, could you please let me know how you generated the graphic?


The one I posted is under Map in the controller, then pick Topology from the drop down. 

New Member
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Re: Link Aggregation on Unifi Switch

My topology doesn't show link speeds, should it?

 

Infact it's totally broken right now (the latest of an endless list of 'what now FFS' anomolies) it only shows 1 switch out of 3, something that was working previously with no issues.

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Registered: ‎08-02-2018

Re: Link Aggregation on Unifi Switch


@UBNT-cmb wrote:

LACP is the only aggregation option currently on UniFi switches (and is generally always what you want to use, odd the AP doesn't support it). 

 

Static LAG isn't currently supported, add a kudo here if it's of interest. 

https://community.ubnt.com/t5/UniFi-Routing-Switching-Feature/Static-LAG-support/idi-p/1773079


 

How is this not a thing yet? After one year the request isn't even in consideration..

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Re: Link Aggregation on Unifi Switch


@escuderfran wrote:

@UBNT-cmb wrote:

LACP is the only aggregation option currently on UniFi switches (and is generally always what you want to use, odd the AP doesn't support it). 

 

Static LAG isn't currently supported, add a kudo here if it's of interest. 

https://community.ubnt.com/t5/UniFi-Routing-Switching-Feature/Static-LAG-support/idi-p/1773079


 

How is this not a thing yet? After one year the request isn't even in consideration..


Reading between the lines I think there is a complete rebuild of the controller underway and basically the old controller is being primped and prettied but fundamentally left alone while the Unifi team build a new one. I sincerely hope that’s the case.