Cisco Cisco IOS Software Release 12.0 S

Conditions: Occurs when the router receives a “pim join” message. The router allocates blocks of 
memory that are never released. Occurs when there are more than three IPv6 PIM hosts on the same 
network segment. 

Workaround: There is no workaround. 

CSCsl33781

Symptoms: Primary RP crashes when the clear counter command is entered.

Conditions: Occurs when the command is issued while traffic is flowing.

Workaround: There is no workaround.

CSCsl34355

Two crafted Protocol Independent Multicast (PIM) packet vulnerabilities exist in Cisco IOS 
software that may lead to a denial of service (DoS) condition. Cisco has released free software 
updates that address these vulnerabilities. Workarounds that mitigate these vulnerabilities are 
available.

This advisory is posted at 

.

This section describes possibly unexpected behavior by Cisco IOS Release 12.0(33)S. All the caveats 
listed in this section are open in Cisco IOS Release 12.0(33)S. This section describes only severity 1, 
severity 2, and select severity 3 caveats.

CSCek77029

Symptoms: The remove-private-as command does not work as expected when applied to a neighbor 
for which a route-map with a “set as-path prepend” and “continue” statement are configured. 

Conditions: Occurred on a router with the following configuration:

route-map test permit 10

set as-path prepend 2

continue

route-map test permit 20

set metric 200

Workaround: Do not use the remove-private-as command with the above configuration. 

CSCsb63652

Symptoms: BGP convergence is very slow and CPU utilization at BGP Router process is always near 
100% during the convergence at aggregation router. 

Conditions: Occurs if the number of component prefixes belonging to the aggregate-address entry 
increases. Also occurs if the number of duplicate aggregation component prefixes for 
aggregate-address entry increases

Workaround: Remove the “aggregate-address” statement. 

CSCsc27668

Symptoms: When you enter the neighbor ip address send-label explicit-null command, the RP may 
crash.