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MAC addressing help
CCNA & CCENT
I am having issues with mac address/frame forwarding. I was wondering if there were any good tutorials out there to help me out with figuring out which ports a frame would go out if it had a destination address of x.
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The Cisco Press Intro book covers that topic like no other. I recommend this book.
It would take the spanning-tree path from switch to switch untill it got to the destination switch, in which case the frame would be forwarded to the corresponding interface. If there are no loops or redundancy, then there are no spanning-tree paths. If there are no loops, then the frame will take a linear path straight to the switch that the host resides. If there are no loops AND you have switches daisy chained together, the interfaces that connect the two switches will have numerous MAC's associated with those interfaces.
For instance if switchA was connected to switchB from A fa0/1 <----> fa0/1 B. SwitchA would have all the host's MAC addresses on it's fa0/1 that were connected to switchB. And vice versa. That way when a frame traverses switchA that is destined for a host on switchB, then switchA can forward the frame on to switchB. If the MAC hasn't been learned yet, then the frame will be broadcasted. Read up on forward/filter decision making AND MAC learning. Have Fun!!!!
There is no place like 127.0.0.1 BUT 22.214.171.124 is my 127.0.0.1 away from 127.0.0.1!
VLANS VTP STP Cisco Flash Tutorials thread
could be of some use....
Anyone remember if Cisco has a "Bridging" flash presentation? A switch is just a multi-port bridge... and I remember one from the Cisco Network Academy.
There is the
Managing Mac Address table e-Lab
over in the CCNA Prepcenter (create your free account if you haven't already done so).
Ah Ha! maybe this Cisco
How LAN Switches Work doc
-- which includes
:mike: Cisco Certifications -- Collect the Entire Set!