Description

I have l2pt via vxlan. When I deactivate protocols layer2-control, lacp always stays Collecting distributing

Is ACX7K having l2pt feature enabled by default ? I don't understand how without enabling l2pt feature, we can establish lacp via EVPN-VXLAN .


Symptoms

root@JTAC> show lacp interfaces ae31

Aggregated interface: ae31

LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity

xe-0/0/14 Actor No No Yes Yes Yes Yes Fast Active

xe-0/0/14 Partner No No Yes Yes Yes Yes Fast Active

LACP protocol: Receive State Transmit State Mux State

xe-0/0/14 Current Fast periodic Collecting distributing

 

root@JTAC> show lacp interfaces ae32

Aggregated interface: ae32

LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity

xe-1/0/14 Actor No No Yes Yes Yes Yes Fast Active

xe-1/0/14 Partner No No Yes Yes Yes Yes Fast Active

LACP protocol: Receive State Transmit State Mux State

xe-1/0/14 Current Fast periodic Collecting distributing

Solution

ACX7K supports L2PT, as confirmed in below feature link.

https://apps.juniper.net/feature-explorer/feature/2061?fn=Layer%202%20protocol%20tunneling%20(L2PT)

 

As per the developers who worked on the RLI for transparent L2PT, With this RLI L2 Control PDUs are treated as data traffic, if L2 control protocols are not configured on the device. 

To transparently tunnel Control PDUs, we need to ensure we have data path working fine.

 

So per the above statement, when later2-control is deactivated, the L2 control PDUs are treated as data traffic.

Hence the traffic should run fine until interface or vlan is disabled, as per test.


With RLI changes mentioned: For L2 protocol transparent tunnelling, there is no explicit config to be done on the device. 

It means the same protocol need not be configured on the interface where the protocol packets are received in order to forward the packets in the hardware. 

Modification History

2025-05-01 : Article Created