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Slow connection when using Cisco VPN on a broadcom card

Posted on 2010-09-09
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Last Modified: 2013-11-17

Hi Guys,

Another interesting one for you guys.....

When I/We use CISCOVPN to connect to some of our clients, the VPN connection is very slow
When using a Broadcom card

However if I connect to the same client using a machine with a different make of network card - all is ok!

I have tried changing MTU rates etc but to avail
I have the latest Broadcom driver and chipset + bios

Multiple units affected - but only with the Broadcom cards

If I use another type of VPN - Firebox to connect to the same client using the Broadcom card - all is ok

Is there a patch or an updated CiscoVPN client that resolves this issue?
CiscoVPN software version is 5.0.00.0340


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Question by:BillyBob_nomates
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by:Matt V
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This is a workaround until a fix is issued but seems to work. In the device properties of the Broadcom NIC, disable "VLAN Priority Support"

(in XP for example: Right-click My Computer > select Properties option > click Hardware tab > select Device Manager button > expand Network Adapters entry > right-click Broadcom xxxx Wireless NIC > select Properties option > click Advanced tab and find the VLAN Priority Support option and disable it)
FROM:http://www.daughertyitconsulting.com/index.php?option=com_content&task=view&id=29&Itemid=71
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by:BillyBob_nomates
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Hi mattvmotas,

Thanks for reponce

This is for hard wired network card - not wireless but checked anyway

I have checked the above and there is no option for VLAN`
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by:kf4zmt
kf4zmt earned 250 total points
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I had a really strange problem somewhat similar to this once and it turned out to be a problem with the NIC driver.  At the time I was using the latest version of the NIC driver, but a few months later a new driver was released that completely fixed the problem.
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by:Allvirtual
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This is a known issue. Cisco VPN clients are poor design. Use NCP http://www.ncp-e.com. Much more professional, faster and more reliable.
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by:Matt V
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Cisco VPN client is fine, the issue is the broadcom card.  I have had more problems with broadcom network cards than any other.  And it is always weird problems like this one.
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by:Allvirtual
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Whatever you say. The NCP client has zero problem with this hardware. And the Cisco client is full of flaws and very unstable as most people know.
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by:BillyBob_nomates
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Hi guys, tried 5 different diver versions - same fault

Also tried changing the sending large data packets

Does any of you know what Realtec card will work with Broadcom 57xx card?

As the above make works fine...

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BillyBob_nomates earned 0 total points
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Hi Guys,

I have been playing with Shrew - + a working version of Cisco 5.0.07.0290

However I can get connected as above...but still no ping or connection to some CMRs

Tried disabling VLAN Priorty - same fault


Any other ideas guys?????
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