Cisco Cisco IOS Software Release 12.2(10)

Turn console logging off if you plan to reboot the DSLAM. Turn console logging back on after the 
system comes up. (Console logging is turned on by default.) Use the global configuration commands no 
logging console (to turn the feature off) and logging console (to turn it on).

If console logging is on when the system reboots, the large volume of console messages consumes CPU 
time. As a result, the system comes back up more slowly and line cards might reload repeatedly, causing 
further delays.

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most 
serious caveats; severity 2 caveats are less serious. Severity 3 caveats are moderate caveats, and only 
select severity 3 caveats are included here.

This section contains only open, closed, and resolved caveats for the current Cisco IOS release.

Caveat numbers and brief descriptions are listed in

, 

. For 

details about a particular caveat and for information on caveats in previous Cisco IOS releases that also 
apply to this release, go to Bug Toolkit at:

To access this location, you must have an account on Cisco.com. If you have forgotten or lost your 
account information, e-mail the Contact Database Administration group at 

. If you 

do not have an account on Cisco.com, go to

 http://www.cisco.com/register

 and follow the directions to 

set up an account.

If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity 
for any release. To reach Bug Navigator II, go to Cisco.com and click Login. Then go to Software 
Center > Cisco IOS Software > Cisco Bugtool Navigator II. Alternatively, you can go to

This software release is based on Cisco IOS Release 12.2. For information on caveats in Cisco IOS 
Release 12.2, see Caveats for Cisco IOS Release 12.2, which lists severity 1 and 2 caveats and 
select severity 3 caveats for Cisco IOS Release 12.2. It is located on Cisco.com and the 
Documentation CD-ROM.

 lists the caveats that have been resolved in Cisco IOS Release 12.2(12)DA3.

CSCed38527

TCP checks should verify syn sequence number

CSCed27956

TCP checks should verify ack sequence number

CSCeb56909

Crafted packet causes reload on Cisco routers