Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario Pagina 17

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463
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
Unexpected exception to CPUvector 2000, PC = 261FC60
Workaround: There is no workaround.
CSCtd74135
Symptoms: Microsoft Point-to-Point Encryption (MPPE) enforcement may not work on a
Cisco router. The router may allow Point-to-Point Tunneling Protocol (PPTP) users to connect
without negotiating the MPPE.
Conditions: This symptom is observed on a Cisco router that is running Cisco IOS Release 15.0(1)M
even if it is configured with the ppp encrypt mppe 128 required command.
Workaround: Using the authentication type of MS-CHAP in place of MS-CHAP-V2 can prevent this
issue. The MPPE works fine with the required option as well, when used with the authentication type
“MS-CHAP”.
CSCtd93508
Symptoms: SIP-200 goes into crashing loop with the following messages in the log:
%R4K_MP-3-CRASHED: CPU 1 has now crashed a total of 11 times. SYS-3-INTPRINT: Illegal
printing attempt from interrupt level.
-Process= "CPU Monitor", ipl= 5, pid= 54
This secondary crash happens because of primary crash in the QoS code, which happens when high
priority traffic is flowing through QoS enabled interfaces of a particular SPA.
Conditions: From the crashed system the SPA used was “SPA-1XCHSTM1/OC3 (0x463)”. Other
SPAs may be affected.
The trigger is just the flow of priority traffic through this interface with the following policy attached
to that serial interface:
policy-map child
class pri
priority percent 4%
class bw
bandwidth percent 25%
class class-default
bandwidth percent 71%
policy-map parent
classs class-default
shape average < > kbps
service-policy child.
policy-map parent classs class-default shape average < > kbps service-policy child.
Note: Any flavor of priority like priority, priority percent, priority kbps can trigger this error
condition.
Workaround: Replacing the priority percent with bandwidth percent will solve the crash, but traffic
is not properly prioritized:
policy-map child
class pri
bandwidth percent 4% <<<< priority to bandwidth
class bw
bandwidth percent 25%
class class-default
bandwidth percent 71%
CSCtd94144
Symptoms: Ethernet OAM packets are not terminated locally.
Conditions: This is seen only when xconnect is configured under main interface for l2tpv3
tunneling. This is not applicable for VLAN mode l2tpv3.
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