topic I would like to know what does that debug message means: As221 L2F: OUT UDP FS Fail in Network Security https://community.cisco.com/t5/network-security/i-would-like-to-know-what-does-that-debug-message-means-as221/m-p/48729#M1062984 <P>I have an AS5300 and, when I activate debug vpdn l2x-errors it appears very often a message this similar:</P><P></P><P>As221 L2F: OUT UDP FS Fail</P><P></P> Fri, 21 Feb 2020 06:09:07 GMT admin_2 2020-02-21T06:09:07Z I would like to know what does that debug message means: As221 L2F: OUT UDP FS Fail https://community.cisco.com/t5/network-security/i-would-like-to-know-what-does-that-debug-message-means-as221/m-p/48729#M1062984 <P>I have an AS5300 and, when I activate debug vpdn l2x-errors it appears very often a message this similar:</P><P></P><P>As221 L2F: OUT UDP FS Fail</P><P></P> Fri, 21 Feb 2020 06:09:07 GMT https://community.cisco.com/t5/network-security/i-would-like-to-know-what-does-that-debug-message-means-as221/m-p/48729#M1062984 admin_2 2020-02-21T06:09:07Z Re: I would like to know what does that debug message means: As2 https://community.cisco.com/t5/network-security/i-would-like-to-know-what-does-that-debug-message-means-as221/m-p/48730#M1062985 <HTML><HEAD></HEAD><BODY><P>Generally speaking the message is not</P><P>a cause for concern. This message</P><P>indicates that an L2F packet was not</P><P>fast switched. I'm not sure if you</P><P>are doing VPDN or MMPPP, but you should</P><P>ensure that fast switching ("ip route-</P><P>cache") is enabled on all your interfaces.</P><P></P><P>It could also be a message indicating the</P><P>first packet of a connection is not</P><P>being fast switched, which is also expected.</P><P></P></BODY></HTML> Mon, 08 Jul 2002 16:55:09 GMT https://community.cisco.com/t5/network-security/i-would-like-to-know-what-does-that-debug-message-means-as221/m-p/48730#M1062985 2002-07-08T16:55:09Z