Hey chaps,
Here is my scenario:
Allow only the following Layer 2 protocols across VLAN 146
o STP BPDUs (consider both ISL and 802.1q trunks)
o CDP, VTP, and UDLD
o ARP
mac access-list extended MAC_FILTER
permit any any !ETHERTYPE
permit any any lsap 0x4242 0x0
permit any any 0x010B 0x0
permit any any 0x806 0x0
I had no idea where to begin to find these values, are we expected to memorize these !! :(
So that brings me to the information I am looking to glean from you goo people:
2. Why do we always set the mask to 0x0, is there a case where this would be different? (I may have skimmed this part of my studies!!)
\Sam