Cisco IOS Release 12.4(22)T4 is a rebuild release for Cisco IOS Release 12.4(22)T. The caveats in this
section are resolved in Cisco IOS Release 12.4(22)T4 but may be open in previous Cisco IOS releases.

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CSCsc62963

Symptoms: The interface MTU is not user configurable. When you attempt to configure “interface
level command mtu”, the following message is printed:

% Interface {Interface Name} does not support user settable mtu.

Conditions: The symptom is observed with a 2-Port FE on a Cisco 7200 series router.

Workaround: There is no workaround.

Further Problem Description: The Cisco.com document entitled “MPLS MTU Command Changes”
further discusses this enhancement.

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CSCsm87925

Symptoms: Memory leak occurs in SSGCmdQue.

Conditions: Occurs on routers configured for Service Selection Gateway (SSG) and running
Cisco IOS Release 12.4(15)T2.

Workaround: There is no workaround.

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CSCso69413

Symptoms: A Cisco router may reload when Flexible Packet Matching is configured.

Conditions: This symptom occurs when a class is configured to match on a protocol field when the
protocol stack has not been defined. The stack class- map is required for all field references.

Workaround: Specify the exact bits to be matched with the match start command.

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CSCso97304

Symptoms: Configuring and unconfiguring hierarchical QoS may cause memory leak on a Cisco
router.

Conditions: This symptom occurs on a Cisco router that is running Cisco IOS Release 12.4(15)T4.