[c-nsp] PVLAN and trunks (for redundancy and more bandwidth), any idea?

[Sven 'Darkman' Michels]

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Hi there,

i'd like to use the pvlan feature from Cisco for two networks. I already read
a lot of documentation on the pvlan feature on ciscos page and mayn other blog
posts etc. and already know, that it seems not to be possible to use the pvlan
feature with etherchannel/port groups on any device. A part from no information
*why* this is not possible, i have no idea, how to complete the following setup:

I'd like to have my PVLAN connected to my "core" network in a kind of redundancy
and "more" bandwidth. The PVLAN has GBIT enabled devices, the uplink to the core
should be more than one GBIT (to ensure that no single device is able to fill
the uplink, but also able to use max of avaiable bandwidth). Sadly, a TGigE Uplink
is not yet possble. As switches we have 3560G and the core is currently a 6509.
At least the redundancy is important, so i could try it with "backup-interface" on
the 6509, but this would limit the pvlan to 1GigE, which is not exactly what i
want.
Another problem is, that i currently plan to deploy two isolated pvlans on the
3560 switches, which "should" be no problem if i use two different primary vlans
(a primary may only carry one isolated pvlan at a time), but it seems to be not
possible to use one uplink/trunk port for two different isolated pvlan setups?
If thats true, i would need at least four ports (two for each isolated pvlan) just
to get the redundancy and would not have any uplink >1GigE...

Did i miss anything? is there a way to get the redundancy and the bandwidth? may
i use two isolated pvlans on the same uplink? Is there some way to use something
"like" etherchannel with pvlans? Or is there a way to change the setup in a way
i would get pvlan + more bandwidth + redundancy without all of these problems or
limitations? ;)

Thanks and regards,
Sven

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