Cisco Cisco IOS Software Release 12.2(2)XI

When specifying the method of authentication while configuring PPPoE and connecting to a Service 
Provider, the optional argument might be required to successfully authenticate the connection. For 
example: 

interface Dialer0

 ppp authentication pap optional

or

interface Dialer0

 ppp authentication chap optional

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most 
serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these 
three severity levels.

Caveats in Cisco IOS Releases 12.2 and 12.2 T are also in Cisco IOS Release 12.2(2)XI2. For 
information on caveats in Cisco IOS Release 12.2, see Caveats for Cisco IOS Release 12.2. For 
information on caveats in Cisco IOS Release 12.2 T, see Caveats for Cisco IOS Release 12.2 T. These 
two documents list severity 1 and 2 caveats and are located on CCO and the Documentation CD-ROM. 

If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any 
severity. To reach the Bug Toolkit, log in toCisco.com and click Service & Support: Technical 
Assistance Center: Tool Index: Bug Toolkit. Another option is to go to 

http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl

.

This section describes unexpected behavior that is fixed in Releases 12.2(2)XI1 and 12.2(2)XI2.

An error can occur with management protocol processing. Please use the following URL for 
further information:

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903