In a Supervisor Engine 6-E system, the ports are connected to the switching engine through a stub ASIC. This stub ASIC imposes some limitations on the ports: Gig and 10 Gig ports cannot be mixed on a single stub ASIC; they must either be all 10 Gig (X2), or all Gig (TwinGig Converter and SFP). The faceplates of X2 modules show this stub port grouping, either with actual physical grouping with a box drawn around a grouping.
I entered the command hw-module uplink mode shared-backplane and rebooted the switch and i was able to use both 10G ports on primary supervisor (slot 5) and 1G ports on standby supervisor (slot 6).
So, it does not appear that i need to use 10G ports ONLY on both supervisors or 1G ports ONLY on both supervisors.
I am able to mix 10G / 1G as long as they are identical on EACH supervisor.
When i said show hw-module module 5 port-group or hw-module module 6 port-group, it now shows only 1 port-group. Prior to using the hw-module uplink mode shared-backplane command, i was able to see 2 port groups.
so are you able to get a 1 gig and a 10g working in one sup engine? I can't. I have a 4510 with SUP6E engines. I applied the hw-module uplink mode shared-backplane command, reboot the switch, now I only see 1 port group per sup engine. I can only do either or, not both. If I want to get the 1 gig working, then can't use the 10gig. I can get the 10 gig working, but doing so would make the 1 gig inactive. So it looks it is either or, not both.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
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