Cisco OL-4015-08 Manual de usuario descargar pdf (Pagina 619)

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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

Conditions: This symptom is observed in a stress situation when bursty traffic is received.

Workaround: There is no workaround.

• CSCed54080

Symptoms: Per-VPN per-destination loadbalancing does not operate correctly on an Engine 2 or 4+

and there seems to be loadsharing only on BGP nexthop.

Conditions: This symptom is observed on a Cisco 12000 series that runs Cisco IOS

Release 12.0(23)S4.

Workaround: The clear ip route vrf vrf-name command invokes a recalculation of the hashes. Also,

the clear ip /jointfilesconvert/415844/bgp neighbor soft command (can) reassign(s) new labels and respread(s) the load.

These commands may impact service by stopping traffic forwarding.

• CSCed55201

Symptoms: A serial interface may stop transmitting, and the following error message may be

generated:

%RSP-3-RESTART: interface Serial1/0/2, not transmitting

-Traceback= 403D8D88 403E2830 4036B72C 4036B718

Conditions: This symptom is observed on a Cisco 7500 series that is configured with an 8-port serial

V.35 port adapter (PA-8T-V35).

Workaround for HDLC interfaces: Disable CDP, the passive interface, and the outbound IP ACL.

Workaround for Frame Relay interfaces: Disable CDP, the passive interface, the outbound IP ACL,

and LMI.

• CSCed63508

Symptoms: Up to 10 percent of packets that are larger than 1496 bytes are dropped when passing

through an Engine 3 4-port GE line card (4GE-SFP-LC).

Conditions: This symptom is observed on a Cisco 12000 series when the line card is used for both

the ingress and egress traffic flow. This situation occurs when SNF is configured on the egress

interface of the affected line card by entering the ip route-cache flow sampled output command.

Workaround: Increase the MTU on any interface of the Engine 4-port GE line card to 1530 bytes to

enable the buffer resources of the line card to be initialized with a larger size.

Alternate Workaround: Decrease the rate of packets drops by increasing the sampling period. For

example, when you enter the ip flow-sampling-mode packet-interval 10 command, up to 10

percent of packets that are larger than 1496 bytes are dropped. However, when you enter the ip

flow-sampling-mode packet-interval 1000 command, only 0.1 percent of packets that are larger

than 1496 bytes are dropped.

• CSCed64702

Symptoms: On a Cisco 10000 series, the PXF information may not be correctly updated from the

RP after a route change, causing packets to be sent untagged even though the RP shows that the

packets should be sent as tagged.

Conditions: This symptom is observed on a Cisco 10000 series that runs Cisco IOS

Release 12.0(26)S.

Workaround: Enter the clear isis * command or enter the shutdown command followed by the no

shutdown command on the interface towards the MPLS cloud.

• CSCed67734

Symptoms: Packet processing at the remote end of a link may fail.

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