Utilizing both Internet Ports as Port-Channel on MX450 Switches?

[Stuka_Fluka]

Hi Folks...please let me know if it is possible to utilize both Internet ports on an MX450 (bundled as port-channel) for redundancy and high-availability?

I could not locate that in Meraki documentation, hence posting this question.

Will highly appreciate any and all inputs.

The scenario is that we plan to configure MX450 in one-armed concentrator mode and if one Internet port fails, the site goes down as the MX450 connects to the outside world via a single interface.

Thanks in advance.

[alemabrahao]

Yes, it is entirely possible, I have even configured Warm spare on other clients using both WAN ports and it worked perfectly.

Sorry, as port channel no, Meraki MX does not support port channel.

[alemabrahao]

https://documentation.meraki.com/MX/Networks_and_Routing/MX_Layer_2_Functionality#LACP_and_Link_Aggr...

[RWelch]

VPN Concentrator Deployment Guide 

One-Armed Concentrator

This configuration utilizes an MX device configured to act in VPN concentrator mode, with a single Ethernet connection to the upstream network. All traffic will be sent and received on this interface. This is the recommended configuration for MX appliances serving as VPN termination points into the datacenter.

[Main10ence]

Hello @Stuka_Fluka, as stated by @alemabrahao, LACP is not supported on the WAN side of the MX. However, if you have dual WAN link, they can still be used as redundancy, even it's the same ISP. 

[cmr]

@Main10ence I think in one armed mode you can only use one of the WAN ports, or has that changed?

[PhilipDAth]

A LOT of Meraki customers would LOVE to have LACP functionality on an MX.
Failing that, to be able to create a primary and backup LAN port  (like "Flex Links" on Cisco Enterprise where you can configure a switch port as a backup for another port https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/15-3SY/config_guide/sup6T/15_3_s... using the "switchport backup interface" command) that does not rely on spanning tree.  I believe primary/backup LAN ports could be implemented with a software-only change on all existing MX models, because all it involves is leaving the backup LAN port in a disabled state, and simply enabling it if the primary LAN port goes down.

In fact, I just used the "Give Feedback" option in the Meraki Dashboard to request this again.  If I could just get 10,000 more people to give the same feedback we might be able to make this happen!

https://documentation.meraki.com/General_Administration/Other_Topics/Give_your_feedback_(previously_...