Cisco OL-4015-08 Manual de usuario Pagina 638

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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(30)S
CSCee77227
Symptoms: When a channel group is removed and readded to the controller, and then a PRE
switchover occurs, the PPP line protocol on the readded channel goes down after a while.
Conditions: This symptom is observed on a Cisco 10000 series that is configured with 24-port
channelized E1/T1 line cards.
Workaround: Enter the shutdown interface configuration command followed by the no shutdown
interface configuration command on the affected interface.
CSCee77744
Symptoms: An ISE line card that is configured for IPv6 and that has traffic flowing through it may
reload when you enter the no ipv6 unicast-routing command.
Conditions: This symptom is observed on a Cisco 12000 series only when you enter the no ipv6
unicast-routing command.
Workaround: Stop the IPv6 traffic before you enter the command.
CSCee77867
Symptoms: A standby PRP that functions in SSO mode continues to reset.
Conditions: This symptom is observed on a Cisco 12406 that runs a Cisco IOS interim release for
Release 12.0(29)S and that is has an ATM VC bundle configuration.
Workaround: Reload the standby PRP without the ATM VC bundle and re-apply the ATM VC bundle
after the standby PRP has booted.
CSCee78118
Symptoms: A line card or port adapter may crash on an MPLS VPN PE router when the
customer-facing interfaces are flapped.
Conditions: This symptom is observed when any of the following conditions are present:
eBGP is used as the routing protocol between the PE and CE router, the CE router has the
redistribute connected command enabled in the BGP configuration, and there are multiple
eBGP sessions between the PE and CE router.
The connected route for the link between the CE and PE router is learned from another PE router
via MP-iBGP. For example, the CE router may be dual-homed and may advertise the connected
routes to both PE routers.
The symptom affects routers that perform MPLS forwarding using ASICs such as some
Cisco 7200 series routers, the Cisco 7304, the Cisco 10000 series, the Cisco 12000 series, and the
Cisco RPM-XF. (This list may not be exhaustive.)
Workaround: Avoid the above-mentioned conditions. For example, avoid the redistribute
connected command in the BGP configuration of the CE router.
CSCee78567
Symptoms: A temporary counter condition in which you see very large MPLS TE tunnel counter
spikes may occur on a Cisco 12000 series. This situation is observed via the SNMP variable
IfHCOutOctets (the total number of octets transmitted), via the SNMP variable locIfOutBitsSec (the
Cisco 5-minute decaying average), and in the output of the show interfaces tunnel number
privileged EXEC command (observe the elevated output rate).
Conditions: This temporary counter condition is observed only for one or two sample periods and
affects the MPLS-TE auto-bandwidth mechanism because the collection timer may be invoked at a
time while the counter is at an extreme value. If the auto-bandwidth mechanism collection value is
greater than the physical interface capability, the LSP tunnel build fails at the next LSP tunnel build.
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