Cisco Cisco IOS Software Release 12.2

Workaround: There is no workaround. 

CSCec68292

Symptoms: Dialer ping packets that are transferred via an asynchronous line may be dropped at the 
receiving end.

Conditions: This symptom is observed on a Cisco platform when the interface at the receiving end 
has the dialer map interface configuration command enabled.

Workaround: Do not enter the dialer map interface configuration command. Rather, enter the dialer 
string interface configuration command. 

CSCec72974

Symptoms: A router may not reestablish the backup connection when an active physical ISDN link 
is interrupted.

Conditions: This symptom is observed on a Cisco router that has dialer backup configured using the 
Dialer Watch feature. Note that the symptom does not occur when the debug dialer events 
privileged EXEC command is enabled.

Workaround: To ensure that there is always one B channel available for dialup, even when the ISDN 
link toggles and causes and active call to be terminated, enter 1 for both the minimum and maximum 
arguments in the dialer pool-member number min-link minimum max-link maximum interface 
configuration command.

Alternate Workaround: Enter the debug dialer events privileged EXEC command.

Cisco IOS Release 12.2(21b) is a rebuild release for Cisco IOS Release 12.2(21). The caveats in this 
section are resolved in Cisco IOS Release 12.2(21b) but may be open in previous Cisco IOS releases.

The following information is provided for each caveat:

Symptoms: A description of what is observed when the caveat occurs. 

Conditions: The conditions under which the caveat has been known to occur. 

Workaround: Solutions, if available, to counteract the caveat. 

CSCdz32659

Symptoms: Many memory allocation failure (MALLOCFAIL) messages may occur for a 
Cisco Discovery Protocol (CDP) process:

%SYS-2-MALLOCFAIL: Memory allocation of 

-1732547824 bytes failed from x605111F0, pool Processor, alignment 0 

-Process= "CDP Protocol", ipl= 0, pid= 42 

-Traceback= 602D5DF4 602D78A0 605111F8 60511078 6050EC88 6050E684 602D0E2C 602D0E18

Conditions: The symptom is observed on a Cisco 7513 that runs Cisco IOS Release 12.0(17)ST. The 
symptom may also occur on other Cisco 7500 series routers that run Release 12.0 S, 12.2 S, 12.3, 
or 12.3 T.

Workaround: To prevent the symptom from occurring again, disable CDP by entering the no cdp 
run global configuration command.