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Disabling the Sending of PPPoE Access Concentrator Tags in PADS Packets

By default, a router that functions as an access concentrator (AC) sends the AC-Name and AC-Cookie tags, along with the Service-Name, Host-Uniq, Relay-Session-Id, and PPP-Max-Payload tags, in the PPPoE Active Discovery Session (PADS) packet when it confirms a session with a PPPoE client. The AC-Name and AC-Cookie tags are defined as follows:

  • AC-Name—String that uniquely identifies the particular AC

  • AC-Cookie—Tag used by the AC to help protect against denial-of-service (DoS) attacks

If it is necessary for compatibility with your network equipment, you can prevent the router from sending the AC-Name and AC-Cookie tags in the PADS packet.

To prevent the router from transmitting the AC-Name and AC-Cookie tags in the PADS messages:

  • Specify that PADS messages with AC-Name and AC-Cookie tags are not sent.

    The no-send-pads-ac-info statement affects PADS packets sent only on PPPoE interfaces configured on the router after you configure this statement. It has no effect on PADS packets sent on previously created PPPoE interfaces.