Hi,

I have two Vigor 2820's in separate locations providing a site-to-site VPN (L2TP 3DES-SHA1 Auth) for Office 1 and Office 2. Connection and pings are fine, nothing to worry about.

The users in Office 2 are complaining about poor performance, Outlook not connecting and no access at all (on occasions).

A. When I test connecting to Office 2 via Windows 7 PPTP VPN the connection establishes everytime, but on occasions can take a few minutes (2-3) before I get a ping response from at network device on the Office 2 network.

B. Outlook works when it wants to. If I open Outlook and connect to the Exchange server on Office 2, it updated the Inbox and remains connected for a while, and then all of a sudden it just stops updating the Inbox, no new emails arrive, and outbound message remain in the Outbox.

C. Pings are atrocious. If I ping the public IP of Office 2 I get a decent return

Reply from x.x.x.x: bytes=32 time=83ms TTL=244
Reply from x.x.x.x: bytes=32 time=59ms TTL=244
Reply from x.x.x.x: bytes=32 time=84ms TTL=244
Reply from x.x.x.x: bytes=32 time=60ms TTL=244

If I ping the server in Office 2 whilst PPTP/L2TP VPN is connected to the Draytek I get

Reply from 192.168.20.2: bytes=32 time=104ms TTL=127
Request timed out.
Reply from 192.168.20.2: bytes=32 time=578ms TTL=127
Reply from 192.168.20.2: bytes=32 time=1929ms TTL=127
Reply from 192.168.20.2: bytes=32 time=89ms TTL=127

As a test I setup a OpenVPN Appliance in Office 2 and connected using its client and get the following results:

Reply from 192.168.20.2: bytes=32 time=61ms TTL=127
Reply from 192.168.20.2: bytes=32 time=63ms TTL=127
Reply from 192.168.20.2: bytes=32 time=61ms TTL=127
Reply from 192.168.20.2: bytes=32 time=62ms TTL=127

Has anyone experienced anything like this before?

Thanks.