Cisco OL-4015-08 Bedienungsanleitung Seite 41

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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(33)S6
3. Supervisor force switchover several times
Workaround: Disable ISPF in ISIS.
CSCta24441
Symptoms: Under certain circumstances, an E5 linecard may stop forwarding traffic to a certain
subinterface. We see ARP entries updated, but traffic is not arriving on the connected equipment.
Accordingly, we see on the connected equipment that ARP ages out. The connected VLAN becomes
isolated to the rest of the network. Also, control protocols on the affected interface can go down.
Conditions: The Cisco 12000 is connected to a dot1q trunk. The issue is seen on subinterfaces with
or without VRF, and with various lengths of subnet masks. This issue is seen when the adjacencies
of the affected interface have an adjacency index with a value greater than 16383. This issue can be
seen in a scaled testbed where there is a lot of churn in adjacency creation and deletion as a result
of subinterface deletion and creation or ARP entries getting timed-out and refreshed.
Workaround: Perform a shut/no shut on the subinterface. Make sure to pause before bringing the
subinterface back up. If this does not work, remove the subinterface and configure the same again.
If the above workaround does not work, reloading the RP is the only solution.
CSCta25677
Symptoms: Upon an RPR+ switchover, a few MLPPP interfaces that are configured on an E3
1xChOC12 may start having ping failures.
Conditions: This symptom is observed with a Cisco IOS 12.0(32)S11p fc1 image.
Workaround: Perform a shut/no-shut on the ML interface.
CSCta30330
Symptoms: PIM checksum errors are causing the joins to be dropped in the MVPN.
Conditions:
Topology _______
ce3------BR(Pe)(IOS-XR)---------Pe1(IOS)---------source
Initially, we observed a null olist in the VRF mroutes on the Cisco IOS router. Ideally, in this case,
a tunnel should have been there in the olist.
Then we checked if the tunnel joins are sent and received by the Cisco IOX and IOS routers,
respectively, by enabling the PIM debugs on both routers.
The XR debugs confirmed that joins are sent out by the XR node. Then we checked the debugs on
the Cisco IOS router.
Initially, we suspected that the problem is due to “not to us” messages. Then we checked the IP
traffic statistics.
PE1# show ip traffic
IP statistics: >>>>> PIMv2 statistics: Sent/Received Total: 2087399/4842053, 245046
checksum errors, 0 format errors Registers: 0/0, Register Stops: 0/0, Hellos:
571945/560676 Join/Prunes: 1515499/4036576, Asserts: 0/0, grafts: 0/0 Bootstraps: 0/0,
Candidate_RP_Advertisements: 0/0 Queue drops: 0
PIMv2 statistics: Sent/Received Total: 2092509/4848529, 245374 checksum errors, 0
format errors Registers: 0/0, Register Stops: 0/0, Hellos: 573425/561965 Join/Prunes:
1519100/4041190, Asserts: 0/0, grafts: 0/0 Bootstraps: 0/0,
Candidate_RP_Advertisements: 0/0 Queue drops: 0
PIMv2 statistics: Sent/Received Total: 2092834/4848711, 245396 checksum errors, 0
format errors Registers: 0/0, Register Stops: 0/0, Hellos: 573515/562041 Join/Prunes:
1519335/4041274, Asserts: 0/0, grafts: 0/0 Bootstraps: 0/0,
Candidate_RP_Advertisements: 0/0 Queue drops: 0 >>>>>
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