I've recently set up some VPNs between a few different sites and noticed an annoying, difference in latency between two sites. Unfortunately I can't yet narrow down the cause(s) so have two options. I'll explain the set up first and then detail the issue.
Site A:
10Mb connection to JANET
Cisco 2691 router with Cisco PIX 506e firewall
Site B:
Zen Office Max Pro ADSL
Netgear DG834 router/firewall device
Site C:
Aquiss Office Max 90 ADSL
Draytek vigor 2800G router/firewall device
The authentication/encryption settings are the same from A-B and A-C so both ADSL routers are having to do the same work.
The first VPN was between A and B, and it worked ok, not mind blowing performance but since I hadn't used a VPN before I assumed the pings of almost 50ms between hosts in the two separate LANs was normal. Generally this was annoying but didn't stop things working.
Second up was the VPN from site A to C. I first configured this while using the previous ISP (BT, non MAX) and it worked really well. I noticed the A-C pings were way lower than A-B, in the order of 18-20ms, so 2.5x quicker. I am aware of an increase in latency going from normal ADSL to ADSL MAX so waited for the Aquiss connection to go live before posting here. Now I'm seeing pings of 22-26ms which would maybe account for the MAX/non-MAX latency. It's still miles quicker than A-B which makes the A-B slowness more annoying.
Now for the actual point of my post! Is the rubbish speed due to Zen or the Netgear, and if either are only partially responsible, which is likely causing the larger lag? Annoyingly I cannot use a Draytek v2800 at site B because Zen's MAX service won't work with it. I don't particularly care for their response to the problem (it's a BT/draytek issue) however valid it may be because I have had no such problems with MAX and the v2800 on two other Aquiss ADSL MAX connections.
Thanks
Site A:
10Mb connection to JANET
Cisco 2691 router with Cisco PIX 506e firewall
Site B:
Zen Office Max Pro ADSL
Netgear DG834 router/firewall device
Site C:
Aquiss Office Max 90 ADSL
Draytek vigor 2800G router/firewall device
The authentication/encryption settings are the same from A-B and A-C so both ADSL routers are having to do the same work.
The first VPN was between A and B, and it worked ok, not mind blowing performance but since I hadn't used a VPN before I assumed the pings of almost 50ms between hosts in the two separate LANs was normal. Generally this was annoying but didn't stop things working.
Second up was the VPN from site A to C. I first configured this while using the previous ISP (BT, non MAX) and it worked really well. I noticed the A-C pings were way lower than A-B, in the order of 18-20ms, so 2.5x quicker. I am aware of an increase in latency going from normal ADSL to ADSL MAX so waited for the Aquiss connection to go live before posting here. Now I'm seeing pings of 22-26ms which would maybe account for the MAX/non-MAX latency. It's still miles quicker than A-B which makes the A-B slowness more annoying.
Now for the actual point of my post! Is the rubbish speed due to Zen or the Netgear, and if either are only partially responsible, which is likely causing the larger lag? Annoyingly I cannot use a Draytek v2800 at site B because Zen's MAX service won't work with it. I don't particularly care for their response to the problem (it's a BT/draytek issue) however valid it may be because I have had no such problems with MAX and the v2800 on two other Aquiss ADSL MAX connections.
Thanks
