Hi all.

We have several sites that I'm trying to link via VPN.
But let's concentrate on two.
Both have 500mb/s both ways.
Both have new Draytek 2927ax routers.
Both see that speed from the internet.
But, site to site VPN....seems stuck at 100-120mb/s
Is this all the routers can do? Am I looking at another solution to get a decent speed?
 

https://www.draytek.co.uk/products/business/vigor-2927

VPN Performance:
300 Mb/s IPsec (AES256) VPN Performance
800 Mb/s Hardware Accelerated IPsec VPN Performance - New! (requires f/w 4.2.1)
120 Mb/s SSL VPN Performance
Max. 50 Concurrent VPN Tunnels
Max. 25 Concurrent SSL VPN / OpenVPN Tunnels

That is the spec from the website.

I've got this sorted now, hopefully Google will crawl the thread and this will save someone a headache.

So, we have a main office 1gb/s link, Draytek 2926 router.
This is the main file store, our on premise Exchange, Sage, SQL for a mission critical Windows app etc.
It's that app we'd like to get off remote desktop and onto client machines, for potential performance gains, the experience at the main site and that at remote sites is not comparable.
And two remote offices, 500mb/s link, Draytek 2927's.
The 2826 is, as I've now found out capped at 100mb/s on the LAN to LAN VLAN.
However it DOES NOT like hardware acceleration being turned on the the 2927's (read 2927 spec above).
If it's on (and whether it's on or off on the 2826 is irrelevant) the VPN speed is maybe 70kb/s (no that is not a typo!).
So the 2927's talk to the 2926 at 100mb/s and to each other at 300mb/s IF the IPSec VLAN is setup right and h/w acceleration is off.
With it on they talk at 500mb/s which is the speed of the line, but as detailed, this renders the main site basically off line, a colleague saw "17 hours to update this folder" in Outlook!
This is IPSec only, any other protocol is relatively garbage, 20-70mb/s.

I hope this saves someone the messing around I've had recently!