3Com 4500 PWR 26-Port Configuration Manual page 431

# Set the user name in MAC address mode for MAC address authentication, requiring hyphened
lowercase MAC addresses as the usernames and passwords.
[Sysname] mac-authentication authmode usernameasmacaddress usernameformat with-hyphen
lowercase
# Add a local user.
Specify the user name and password.
[Sysname] local-user 00-0d-88-f6-44-c1
[Sysname-luser-00-0d-88-f6-44-c1] password simple 00-0d-88-f6-44-c1
Set the service type to lan-access.
[Sysname-luser-00-0d-88-f6-44-c1] service-type lan-access
[Sysname-luser-00-0d-88-f6-44-c1] quit
# Add an ISP domain named aabbcc.net.
[Sysname] domain aabbcc.net
New Domain added.
# Specify to perform local authentication.
[Sysname-isp-aabbcc.net] scheme local
[Sysname-isp-aabbcc.net] quit
# Specify aabbcc.net as the ISP domain for MAC address authentication
[Sysname] mac-authentication domain aabbcc.net
# Enable MAC address authentication globally (This is usually the last step in configuring access control
related features. Otherwise, a user may be denied of access to the networks because of incomplete
configuaration.)
[Sysname] mac-authentication
After doing so, your MAC address authentication configuration will take effect immediately. Only users
with the MAC address of 00-0d-88-f6-44-c1 are allowed to access the Internet through port Ethernet
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