VPN is Slow

I have a SBS 2003 setup with VPN connectivity.
Currently, when I connect up to the server, I can use my
exchange via outlook fine. However, If I try to copy a
file over the network, it's extremely slow, to the point
that it's not usable. I have done a search in the
knowledge base for vpn troubleshooting with no luck. Has
anyone else run into this problem?

Any and all help is appreciated.

We have a "single subnet LAN" which includes VPN links and I have had the
same experience.

It is the nature of VPN. VPN has a high over head and runs on links that are
reletively slow compared to CAT5 & 6 LAN links. I have never seen a "fast"
VPN unless you run it over a T3 or something. It usually works fine for
Client-Server Applications (Outlook-Exchange) or with some type of Terminal
Emulation (Terminal Services, Citrix) but not so great with direct file
transfers. Much of the additional overhaed comes from the required
Encapsulation that creates what we think of as the "Tunnel".

Keep in mind that the remote client becomes part of the local LAN when
connected, therefore the slower VPN link is subject to all the LAN Broadcast
that are typical on a LAN. Broadcasts that aren't even noticable on a 100mbs
CAT5 link could be overwhelming on a slower 1.4+mbs T1 link. You could
setup a separate subnet just for VPN "dial-ins" so that the Router between
the two subnets would protect the VPN link from all that stuff flying around
the LAN and would allow the VPN link to remain "quiet" and open for
important traffic. That's why Cisco often refers to a router as a "Broadcast
Firewall". When we split up our LAN into smaller "segments" I believe this
will help our situation, I'm just waiting for cooperation from our other
sites so I dont' step on them by using addresses that one of them is already
using.


--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


"David Cuneo Justin" <(E-Mail Removed)> wrote in message
news:c86901c3eecf$cc4bda70$(E-Mail Removed)...
> I have a SBS 2003 setup with VPN connectivity.
> Currently, when I connect up to the server, I can use my
> exchange via outlook fine. However, If I try to copy a
> file over the network, it's extremely slow, to the point
> that it's not usable. I have done a search in the
> knowledge base for vpn troubleshooting with no luck. Has
> anyone else run into this problem?
>
> Any and all help is appreciated.

On the RRAS Server and have a look at Task
Manager/Networking/Adapter Name/"RRAS Server Dial-In
Interface" -- Link Speed

See if it says 28Kbps!!!!

If it does and you find out out to stop/configure then
please post here because I am having the same problem and
am yet to figure it out!




>-----Original Message-----
>We have a "single subnet LAN" which includes VPN links
and I have had the
>same experience.
>
>It is the nature of VPN. VPN has a high over head and
runs on links that are
>reletively slow compared to CAT5 & 6 LAN links. I have
never seen a "fast"
>VPN unless you run it over a T3 or something. It usually
works fine for
>Client-Server Applications (Outlook-Exchange) or with
some type of Terminal
>Emulation (Terminal Services, Citrix) but not so great
with direct file
>transfers. Much of the additional overhaed comes from
the required
>Encapsulation that creates what we think of as
the "Tunnel".
>
>Keep in mind that the remote client becomes part of the
local LAN when
>connected, therefore the slower VPN link is subject to
all the LAN Broadcast
>that are typical on a LAN. Broadcasts that aren't even
noticable on a 100mbs
>CAT5 link could be overwhelming on a slower 1.4+mbs T1
link. You could
>setup a separate subnet just for VPN "dial-ins" so that
the Router between
>the two subnets would protect the VPN link from all that
stuff flying around
>the LAN and would allow the VPN link to remain "quiet"
and open for
>important traffic. That's why Cisco often refers to a
router as a "Broadcast
>Firewall". When we split up our LAN into
smaller "segments" I believe this
>will help our situation, I'm just waiting for cooperation
from our other
>sites so I dont' step on them by using addresses that one
of them is already
>using.
>
>
>--
>
>Phillip Windell [MCP, MVP, CCNA]
>www.wandtv.com
>
>
>"David Cuneo Justin" <(E-Mail Removed)> wrote in message
>news:c86901c3eecf$cc4bda70$(E-Mail Removed)...
>> I have a SBS 2003 setup with VPN connectivity.
>> Currently, when I connect up to the server, I can use my
>> exchange via outlook fine. However, If I try to copy a
>> file over the network, it's extremely slow, to the point
>> that it's not usable. I have done a search in the
>> knowledge base for vpn troubleshooting with no luck.
Has
>> anyone else run into this problem?
>>
>> Any and all help is appreciated.
>
>
>.
>

I have the problam and the VPN isn't implement with Windows, it is done with
a hardware solution. So I think part of it is simply the nature of VPN and
part of it is the LAN & Broadcast issue I described in my previous post.


--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


"Rick" <(E-Mail Removed)> wrote in message
news:db3c01c3ef6f$97cfc450$(E-Mail Removed)...
> On the RRAS Server and have a look at Task
> Manager/Networking/Adapter Name/"RRAS Server Dial-In
> Interface" -- Link Speed
>
> See if it says 28Kbps!!!!
>
> If it does and you find out out to stop/configure then
> please post here because I am having the same problem and
> am yet to figure it out!
>
>
>
>
> >-----Original Message-----
> >We have a "single subnet LAN" which includes VPN links
> and I have had the
> >same experience.
> >
> >It is the nature of VPN. VPN has a high over head and
> runs on links that are
> >reletively slow compared to CAT5 & 6 LAN links. I have
> never seen a "fast"
> >VPN unless you run it over a T3 or something. It usually
> works fine for
> >Client-Server Applications (Outlook-Exchange) or with
> some type of Terminal
> >Emulation (Terminal Services, Citrix) but not so great
> with direct file
> >transfers. Much of the additional overhaed comes from
> the required
> >Encapsulation that creates what we think of as
> the "Tunnel".
> >
> >Keep in mind that the remote client becomes part of the
> local LAN when
> >connected, therefore the slower VPN link is subject to
> all the LAN Broadcast
> >that are typical on a LAN. Broadcasts that aren't even
> noticable on a 100mbs
> >CAT5 link could be overwhelming on a slower 1.4+mbs T1
> link. You could
> >setup a separate subnet just for VPN "dial-ins" so that
> the Router between
> >the two subnets would protect the VPN link from all that
> stuff flying around
> >the LAN and would allow the VPN link to remain "quiet"
> and open for
> >important traffic. That's why Cisco often refers to a
> router as a "Broadcast
> >Firewall". When we split up our LAN into
> smaller "segments" I believe this
> >will help our situation, I'm just waiting for cooperation
> from our other
> >sites so I dont' step on them by using addresses that one
> of them is already
> >using.
> >
> >
> >--
> >
> >Phillip Windell [MCP, MVP, CCNA]
> >www.wandtv.com
> >
> >
> >"David Cuneo Justin" <(E-Mail Removed)> wrote in message
> >news:c86901c3eecf$cc4bda70$(E-Mail Removed)...
> >> I have a SBS 2003 setup with VPN connectivity.
> >> Currently, when I connect up to the server, I can use my
> >> exchange via outlook fine. However, If I try to copy a
> >> file over the network, it's extremely slow, to the point
> >> that it's not usable. I have done a search in the
> >> knowledge base for vpn troubleshooting with no luck.
> Has
> >> anyone else run into this problem?
> >>
> >> Any and all help is appreciated.
> >
> >
> >.
> >