MX100 WAN Throughput

[Court2]

We have MX100s running 17.10.2 at our primary site, and just upgraded ComcastEDI from 100Mbps to 500Mbps. Only getting 250-300Mbps max throughput. Devices used for testing are whitelisted, uplink config set to 1Gbps, global bandwidth limit set to unlimited. Even disabled AMP and still same throughput. I would expect more with its 750Mbps max throughput rating. Any recommendations or is this the MX100's realistic max throughput? Thanks

[aleabrahao]

Try downgrading to version 16.16.6, version 17.10.x has instability in performance.

[aleabrahao]

By the way, look at this table:

[Court2]

Yes, I referenced the 750Mbps max throughput in my initial post.

[Court2]

I'll give that a shot, downgrade scheduled for tonight. Thanks

[ww^]

Most impact is ids/ips. You could try disable that.

But i supose you dont want to run without ips/amp anyway, so trying 16.16.6 would be the way to go

[Philip D'Ath]

The last couple of times I ran into this, WAN uplink bandwidth limiting was configured. Make sure you have this set to "max".

https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/SD-WAN_and_Traffic_Shaping

This screenshot is not from an MX100, but to give the idea.

[Court2]

That isn't the issue here, but thanks. Mentioned "uplink config set to 1Gbps" in the original post.

[Court2]

On 16.16 now, but still only seeing 250Mbps. Comcast confirmed it was set to 500 on their end. Any other thoughts? I've got an upgrade to 16.16.6 scheduled for tonight.

[CMR]

Have you checked if there is a duplex issue. Has the ISP forced full and you are on auto?

Can you connect a client directly to test the link?

[tintin-ustwo]

Also on MX100 and wondering about this, so bumping this thread.

Tested yesterday to connect directly to the fibre to Ethernet converter and thus omitting the MX100 and then the bandwidth to the Internet was 850 Mbit/s down and 936 Mbit/s up on the 1 Gb connection we are paying for. When connected to the MX100 it got down to 382 Mbit/s dow and 394 Mbit/s up. So more than half of available bandwidth is lost.

I know the MX100 does quite a lot, but still that's a bit too much bandwidth lost, no? Any suggestions on what to check?

Firmware is the current release: MX 18.107.2

Aha, maybe it's about this?

If my calculations are right, that setting should give 200 Mb/s to each client, so then I actually get more than I should. 🤔 😃 But maybe that is due to the ”SpeedBurst” setting which boosts the bandwidth for a while over five seconds.

[CMR]

@tintin-ustwo @You have speed burst enabled, that will allow short term peaks above the limit.

[tintin-ustwo]

Yes, I realized that was likely the reason a while posting my post (so I edited it to add that). Thanks!

[Court2 · Accepted solution]

After watching utilization reports regularly, the MX100s were being over utilized. Replaced with MX105s and all is well now.

[Christopher Adlam]

That's really odd, as I have an MX100 on 500/500 symmetrical fibre and it gets ~470-480 up/down with both AMP and IDS enabled.