You can try to connect to the main vCenter hosting the Linked Mode, if not, I don't believe there is a way.
Though, VMware did release a technology preview wayyyyy back with something called VMware VCAP (vCenter Administrator Portal) not to be confused with VMware vCAP which is where I believe Linked Mode might have originated from. This is actually another virtual appliance that allows you to get a view into all your vCenters via a webAccess type page. Might be what you're looking for and you may not actually need Linked Mode if you only want the consolidated view (that's really up to you)
Here's the page for VCAP
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William Lam
VMware vExpert 2009
VMware ESX/ESXi scripts and resources at:
Twitter: @lamw
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