10. Use “Interface” command to configure PPPoE-IA for Security.
Only PPPoE server’s packets coming from PPPoE-IA trust port(s) are allowed to be forwarded;
otherwise, those packets will be dropped.
Switch(config)# interface
[port_list]
Enter several discontinuous port
numbers separated by commas or a
range of ports with a hyphen. For
example:1,3 or 2-4
Switch(config-if-PORT-
PORT)# ip pppoe
intermediate-agent trust
Configure the selected port(s) as
PPPoE-IA trust port(s).
Switch(config-if-PORT-
PORT)# no ip pppoe
intermediate-agent trust
Disable the PPPoE-IA trust function on
the selected port(s).
11. Enable PPPoE-IA for Security.
Before activating the PPPoE-IA function globally, make sure one port at least must be configured
as PPPoE-IA trust port.
Switch(config)# ip pppoe
intermediate-agent
Enable PPPoE-IA function globally.
Switch(config)# no ip
pppoe intermediate-agent
Disable PPPoE-IA function globally.
Switch# show ip pppoe
intermediate-agent
Show the current PPPoE-IA status and
PPPoE-IA configuration of each port.
Switch(config)# show ip
pppoe intermediate-agent
Show the current PPPoE-IA status and
PPPoE-IA configuration of each port.