We're just looking at running QinQ over a network of 3750G switches, and while I was investigating enabling jumbo frames, I came across this document: http://www.cisco.com/en/US/products/hw/switches/ps700/products_configuration_example09186a008010edab.shtml#c3 which contains: "*Note: *If Gigabit Ethernet interfaces are configured to accept frames greater than the 10/100 interfaces, jumbo frames that ingress on a Gigabit Ethernet interface and egress on a 10/100 interface are dropped."
It seems to me that I want to have jumbo frames enabled on the trunks to 'make room' for the extra dotq header, but if that means that user ports can't run at 10/100 that seems like a severe limitation. Also, the document is from 2005, and doesn't mention QinQ at all. Is this still really the case with a modern 3750G? Is there anything that can be done? There's a sort-of middle area where actually the frame that leaves the 10/100 port would have had the extra layer of dotQ stripped off... is that what I'm missing in the above? Thanks in advance for any light anyone can shed. Howie _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
