RFC 3931, "Layer Two Tunneling Protocol - Version 3 (L2TPv3)", March 2005

Source of RFC: l2tpext (rtg)

Updated by: RFC5641, RFC9601

Errata-ID: 1433

Status:
Verified
Type:
Technical
Reported By:
Stefan Puiu
Date Reported:
2008-05-30
Verified by:
Brian Haberman
Date Verified:
2012-05-09

Section 4.5 says:

The LCCE then checks the Cookie field in the data packet against 
the Cookie value received in the Assigned Cookie AVP during session
establishment.

It should say:

The LCCE then checks the Cookie field in the data packet against 
the Cookie value sent in the Assigned Cookie AVP during session 
establishment.

Notes:

Section 5.4.4 contradicts this directly ("All data messages sent to a peer MUST use the Assigned Cookie sent by the peer in this AVP"), and seems consistent with the rest of the 'assigned ...' fields.