FWIW, I can't confirm this at this second, but I believe that at least
the cisco 7200 series routers have a three PCI bus backplane. And it is
claimed to support an OC-3c VIP2 port adapter, although I haven't put
mine in action to try yet (and when I do I won't be running anywhere
near 155 Mbps anyway). A single VIP2 port adapter can only connect to
one of the three buses, so presumably cisco believes that PCI is up to
the task. I don't know what the clockrate is, and I don't know if it
is 32-bit or 64-bit.
I'm pretty sure the 7200's bridged 3 PCI buses are the fast PCI bus, clocking
at 533 MBps, but just because they come out with an interface for a box
doesn't meant that that box can realistically support it. It's not unheard of
for vendors to come out with a box that you can over subscribe. 7200's max
throughput is about 3-4 DS3s..
Also, 7200s don't have VIP2s. 7200 is basically a VIP2 in a chassis.
-dorian
==>I'm pretty sure the 7200's bridged 3 PCI buses are the fast PCI bus,
==>clocking at 533 MBps, but just because they come out with an interface
==>for a box doesn't meant that that box can realistically support it.
==>It's not unheard of for vendors to come out with a box that you can
==>over subscribe. 7200's max throughput is about 3-4 DS3s..
==>
==>Also, 7200s don't have VIP2s. 7200 is basically a VIP2 in a chassis.
If I remember right, the published bandwidth per bus on CCO is 300 Mbps.
One of the buses is only used for the I/O controller fast ethernet port.
The other two buses cover the odd slots and the even slots (if I remember
right).
/cah