Cisco OL-4015-08 Bedienungsanleitung Seite 205

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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(32)S8
CSCsi03359
Symptoms: When an interface comes up, Cisco IOS triggers a PIM Hello, this hello does not always
make it to the other side. The reason seems to be here that hello is sent before the port can actually
forward IP packets. IGP manages to get its neighborship up but PIM not, then RPF will change to
the new neighbor and in result blackholing happens up to 30 seconds.
Workaround: You could decrease the hello timer for PIM hello.
CSCsi47635
issue observed at big service provider whereas atm-sub interfaces are deleted and new one created
on regular basis as they remove and add new end customers.
Because it is not a manual process as scripting is used to perform that task, old configuration from
deleted sub-interface are showing up on new sub-interfaces and in some cases are creating outages.
This issue was observed in version 12.0(27)S5d.
workaround: verify sub-interface configuration and if configuration cannot be deleted on that
sub-interface, delete this sub-interface then create a dummy sub-interface which will pull that
configuration. Then recreate prior sub-interface.
CSCsi62559
Symptoms: OSPF packets with IP Precedence 0 are classified by SPD as priority packets. This is an
error because only IP Precedence 6 packets should be classified as priority packets by SPD.
Conditions: This symptom is observed on a Cisco router that runs Cisco IOS Release 12.2(18) or a
later release but may also affect other releases.
Workaround: Use ACLs to block invalid IP control packets from reaching the control plane.
ISO CLNS
CSCsg40507
Symptoms: BFD may not come up when an IP address on an interface is changed and when IS-IS is
configured as the routing protocol.
Conditions: This symptom is observed only when you first enter the router isis command and then
enter the bfd all-interfaces command.
Workaround: Unconfigure BFD, change the IP address, and then reconfigure BFD.
CSCsi57971
Symptoms: IS-IS may not advertise the prefix of a passive interface to the IS-IS database on a local
router.
Conditions: This symptom is observed on a Cisco router when you shut down an interface (for
example, G9/1/1) of a 5-port GE SPA (SPA-5X1GE) that is installed in a SIP-600, replace the
SPA-5X1GE with another card, and then enter the no shutdown interface configuration command
on the interface at the same location (G9/1/1) on the new card. In this situation, the prefix for the
interface (G9/1/1) is not advertised.
Possible Workaround: Enter the shutdown interface configuration command followed by the no
shutdown interface configuration command on the affected interface.
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