Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Cisco VPN client and multicast

I have an XP PC which is at a remote site, which I need to connect to my company's network via VPN client. This PC has 2 NIC cards - one for a private LAN, which receives data via multicast, and a public LAN, which will be used for VPN.

When I connect the VPN, the multicast receiving stops. Is there any way to enable it on the second (private) NIC card?

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: Cisco VPN client and multicast

Can you go into the Network Properties of the card, and disable / uncheck the Deterministic Network Enhancer, and see if that makes a difference?

12 REPLIES
Cisco Employee

Re: Cisco VPN client and multicast

Do you receive any other traffic on that interface? Unicast? Or is it just multicast that stops?

New Member

Re: Cisco VPN client and multicast

I receive other traffic on that interface. Seems everything works on that NIC except multicast, like that address space has been "disabled".

Cisco Employee

Re: Cisco VPN client and multicast

Can you enable logging on the VPN client to Level 15. What you would do is first enable logging and change all the log levels to 3, then close the GUI. Open the vpnclient.ini file under c:\program files\cisco systems\vpn client\ and change all the LogLevel=3 to LogLevel=15. Save the file, then launch the GUI, and launch the Log Window - don't change any Log settings.

Once you connect, see if you catch anything in the logs when receiving multicast traffic about it being dropped etc. You could also run wireshark on that interface to see if the physical interface actually sees the packet.

New Member

Re: Cisco VPN client and multicast

No, I don't. I see a bunch of stuff with the VPN connecting, but nothing about multicast traffic.

Cisco Employee

Re: Cisco VPN client and multicast

What about wireshark?

New Member

Re: Cisco VPN client and multicast

I've installed wireshark, but evidently it can't see my network cards. Maybe I need to reboot...

New Member

Re: Cisco VPN client and multicast

Wireshark shows the multicast traffic on the second NIC card until the VPN connects. Then it disappears altogether.

Cisco Employee

Re: Cisco VPN client and multicast

Can you go into the Network Properties of the card, and disable / uncheck the Deterministic Network Enhancer, and see if that makes a difference?

New Member

Re: Cisco VPN client and multicast

WOW...that seemed to work....you're a genius. Thank you very much!

Cisco Employee

Re: Cisco VPN client and multicast

Oh, good. Would appreciate if you could rate the post!

Thanks!

New Member

Re: Cisco VPN client and multicast

Done!! I can't thank you enough. This just saved a lot of travel, and thousands of dollars of troubleshooting.

Cisco Employee

Re: Cisco VPN client and multicast

Glad I could help!

793
Views
0
Helpful
12
Replies