Configuring LAN Interfaces
LAN Interface Configuration Examples
Ethernet Type Code Filtering Example
Using the same configuration as in the previous section, you could allow only the Macintosh traffic by Ethernet type code with the following access list:
lex
This access list permits only those messages whose protocol number matches the masked protocol number in the first line. The implicit last entry in the list is a “deny everything” entry.
Cisco IOS Interface Configuration Guide
