MacBook Pro Running Lion Takes Out Network

Hey everyone.  I know that there has been an issue with wifi connectivity under Lion, but this seems to be different.  I'm running a new MacBook Pro that shipped with Lion.  All of the updates are installed, including 10.7.1 that was meant to correct the previous wifi issue.  My problem is as follows.  Every time that I connect my laptop to the network at work it takes out the internet connectivity through the network.  The router is a Cisco WRVS4400N.  It seemed implausible to me that my on laptop was the culprit, but the problem consistently arises when I connect to the network, and ONLY when I connect to the network.  It does not, however, happen when I connect to any other network.  Is there something to be done about this on my end?  It's starting to get frustrating to not be able to get online at work.

For others that may be having this issue, it seems that it was tied to the IPv6 issue that has been discussed in other posts.  I switched the setting to "Link-Local Only" and it appears to have fixed the problem.  Not sure why . . . but it seems to work for now.
*Update* As I was posting this, the problem showed up again.  I was running the Google Music Beta.  Turned it off and the connection started working fine.  IPv6 setting is back to Automatic and still working.

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