Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario descargar pdf (Pagina 326)

772

Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8

OL-10394-05 Rev. R0

Workaround: Configure interleaving.

• CSCsm79995

Symptoms: Spurious memory access may occur at line card which cause SIP-400 to crash.

Conditions: May occur when attaching a service policy to any interface or removing the service

policy.

Workaround: There is no workaround.

• CSCsm80616

Symptoms: On a system where the access-list compiled command has been configured to enable

Turbo ACL or on systems where Turbo ACL is always enabled, increased CPU utilization may be

experienced because of Turbo ACL compilations being performed repeatedly.

Conditions: This symptom has been observed on a Cisco 7300 router (NSE100) that is running Cisco

IOS Release 12.2(31)SB8.

This situation occurs only in rare circumstances based on the traffic received since the system

booted. When this issue occurs, the output of the show processes cpu command may indicate that

the "TurboACL" process is consuming a significant percentage of the CPU time, and in the output

of the show access-lists compiled command, the "builds" counter increases quickly, approximately

one or more times per minute. Additionally, in the pairs of values separated by slashes on the lines

labeled "L1," "L2," and "L3" in the output of this command, for at least one of the pairs, the value

to the left of the slash will be 90 percent or more of the value to the right of the slash.

Workaround: Note that it is expected that a number of builds will occur in quick succession when

the system first starts receiving traffic. If the situation occurs, it will generally stop occurring after

some time as additional traffic flows are received; but it may be possible to configure the no

access-list compiled command followed by the access-list compiled command to stop the repeated

recompilations.

However, on some systems, such as the Cisco 7304 router, the access- list compiled command is

not available. Therefore, Turbo ACL cannot be switched off on the Cisco 7304 because the

classification table generated by Turbo ACL code is used by QoS, NAT, and Security ACL to index

into their own respective tables. That is the way these features have been designed on the Cisco

7304. On such systems, no workaround is available.

• CSCsm80847

Symptoms: In SwEoMPLS scenario, a policy-map on the core facing ES20 interface matching on

MPLS experimental topmost does not work.

Conditions: The core facing ES20 interface should be first having a policy-map matching on input

VLAN and then after removal of it and application of a policy-map matching on input VLAN would

lead to this condition.

Workaround: If the policy-map matching on MPLS experimental topmost bits was applied to the

core facing ES20 interface without prior application of a policy-map matching on input vlan, this

condition will not be hit.

• CSCsm82382

Symptoms: A memory leak is seen on the Standby RP. If the memory leak is very high, CEF gets

affected and finally gets disabled due to lack of memory. (It may take a few thousand such operations

before the CEF gets disabled.)

Conditions: The symptom is observed on a Cisco Catalyst 6500 series switch and the Cisco 7600

series router and while using 6348 line cards. The leak is seen in some port operations, such as port

mode and port state changes.

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