05-12-2004 04:53 PM - edited 03-02-2019 03:40 PM
If I'm on 1000Base-TX Ethernet, and I want to send a unicast (UDP) frame with a Broadcast MAC address, how will the Cisco 6509(IOS) Gigabit Ethernet interface respond?
For example, take a /30 network between host and router, the host sends a unicast IPv4 packet to an off-net destination, but uses an all FF MACC address.
I'm not sure, but won't the switch/router accept the packet and perform the necessary layer 3 routing anyway?
TIA
-- Rich
05-14-2004 07:01 AM
I don't believe so. The interface will look at the packet, due to it being addressed to all end-stations, but then in looking at the ip header, realize that the frame is not inteded for it, so it most likely will drop it.
Is there a reason that you would use the broadcast mac address to send unicast frames?
05-14-2004 07:36 PM
Truthfully, Gig Ethernet interface software programmers that don't want to write classic ARP functionality code...
They actually had me run IRDP for awhile.
Thanks.
-- Rich
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide