Cisco Cisco IOS Software Release 12.2(27)SBC

Cisco IOS Release 12.2(31)SB12 is a rebuild release for Cisco IOS Release 12.2(31)SB. The caveats in 
this section are resolved in Cisco IOS Release 12.2(31)SB12 but may be open in previous Cisco IOS 
releases.

CSCec34459

Symptoms: A memory leak may occur in the “IP Input” process on a Cisco platform, and memory 
allocation failures (MALLOCFAIL) may be reported in the processor pool.

Conditions: This symptom is observed on a Cisco platform that is configured for Network Address 
Translation (NAT).

Workaround: There is no workaround. 

CSCed84633

Symptoms: The interface-type and interface-number arguments in the distribute-list address family 
configuration command do not function.

Conditions: This symptom is observed on a Cisco platform that integrates the fix for caveat 
CSCea59206. A list of the affected releases can be found at 

software releases that are not listed in the “First Fixed-in Version” field at this location are not 
affected.

Workaround: There is no workaround.

Further Problem Description: The fix for CSCed84633 re-enables the interface-type and 
interface-number arguments in the distribute-list address family configuration command for both 
VRF interfaces and non-VRF interfaces. 

CSCek55562

Symptoms: A CPUHOG may occur.

Conditions: This symptom is observed with various routing commands, including the clear ip route 
command, in cases where more than 300,000 routes were learned via a single subnet.

Workaround: There is no workaround. 

CSCek59453

Symptoms: A spurious memory access may be generated on a router.

Conditions: This symptom is observed on a Cisco router when you configure an ATM VC on which 
PPPoE sessions are established. The trigger is when the VC is torn down.

Workaround: There is no workaround. 

CSCek71844

Symptoms: When the virtual-profile command is configured, PPP sessions do not come up.

Conditions: This symptom is observed on a Cisco router that runs Cisco IOS Release 12.2SB.

Workaround: There is no workaround.