Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 382

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828
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Symptoms: Removal of a subinterface may cause memory corruption or a crash. The symptoms are
unpredictable.
Conditions: The symptoms are rare and will only be observed if a sub- interface is configured for
mpls traffic-eng auto-tunnel primary use, and the sub-interface is later removed from the
configuration.
Workaround: Do not remove sub-interfaces.
CSCsq93507
Symptoms: After a second switchover, forward downstream traffic rate may be limited to 100
packets per second (pps) for all the ISG IP clients put together in that VRF. Upstream traffic is not
impacted and continues to be normal.
Conditions: The symptom is observed when a Cisco 7600 series router has a SIP400 linecard on the
access side, with the sub-interfaces configured with the "access" keyword and when the core is
facing MPLS. After the first SSO, traffic is not impacted. After the second SSO, the downstream
traffic rate may drop to 100 pps.
Workaround: There is no workaround.
CSCsq94036
Symptoms: Packets are hardware-switched after applying IP precedence. The expected behavior
here is that packets are software-processed when "ip precedence" is applied over "ip next-hop"
because applying a policy over the other wipes the adjacencies that were already established.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS Release 12.2SX or
12.2SR.
Workaround: There is no workaround.
CSCsq98626
Symptoms: On a Cisco 7600 configured for ATM Circuit Emulation (CEM) over MPLS, there are
errors reported under the CEM circuit. This is observed using the show cem circuit command.
Conditions: The error is only observed when the core-facing interface has these characteristics:
- SVI i.e L2 (Bridge-domain and Switchport) - The physical interface is from a ES20 module
Workaround: Disable MAC address aging with the mac-address-table aging-time 0 command.
CSCsr05501
Symptoms: The following error message is displayed on the router console during initialization:
"% NBAR Error: hwidb could not found"
Conditions: This symptom may happen when the configuration has QoS policy maps attached to
user sessions.
Workaround: There is no workaround.
Further Problem Description: It s a benign diagnostic message which does not imply any problem
on the router and can be ignored.
CSCsr06282
Symptoms: Causes router to reload following a SNMP get operation.
Conditions: Only occurs when a DHCP operation is configured with option-82 parameters.
Workaround: Do not query MIB objects relating to the DHCP operation configured with option-82
CSCsr08750
Symptoms: A router may crash.
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