SIP-ALG on Meraki MX95

[BL1]

Hi everyone,

We're using Dialpad VOIP and running into a bunch of latency when making calls. We've ran some network tests of theirs and they confirmed that we have SIP-ALG disabled. I'm not finding any information on this in any documentation. Can someone provide some guidance on how I can disable this? Thank you! 

[DarrenOC]

Hmmm…what issues are you having exactly?  Are you getting one-way or no audio or are calls choppy/garbled?

Telephony either works or it doesn’t!  Providers are always too keen to jump at the SIP-ALG is enabled bandwagon.

[BL1]

Thanks for the response. Calls occasionally drop or suddenly the connection isn't great and gets garbled.

[DarrenOC]

You have an MX95 so assume you have a pretty decent internet connection? Are the issues happening during peak usage?  What does the latency/loss graphs show on your WAN connection during these events?

[BL1]

Not necessarily during peak usage. It's been pretty random. The loss graph shows anywhere between .5 to 1% loss during the events.

[Mloraditch]

SIP ALG is not configurable with Meraki and doesn't exist. That's important to know. Otherwise what @DarrenOC is the right path to go down.

[alemabrahao]

In some cases you may need some port forwarding for your PBX. You can also try setting up traffic shaping rules to prioritize VOIP traffic.

[PhilipDAth]

Temporarily, disable IPS, AMP and content filtering.

Does the issue go away?