Cisco OL-4015-08 Manual de usuario descargar pdf (Pagina 70)

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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)S3

Workaround: Create a default IP route destined to null 0 in the global routing table, as demonstrated

in the following example:

ip route 0.0.0.0 0.0.0.0 null 0

• CSCsx46184

Symptoms: In case of E5 FRoMPLS, small-sized frames that are less than 34 bytes are getting

corrupted because of the padding that is being added. Traffic is not getting dropped as the L2 header

(DLCI) is intact; only the extra padding that gets added to the payload is being dropped.

Conditions: This symptom is observed when E5 is acting as edge for FRoMPLS.

Workaround: There is no workaround.

• CSCsx55779

Symptoms: A SIP-601 is reset after local switching is configured. After the linecard comes up,

traffic does not flow end to end on the local switching attachment circuit.

The issue is seen only when the Frame Relay frame size is less than 12 bytes (4 bytes FR header +

4 bytes FCS + 0-4 bytes payload) and when the NLPID value is 0x00 (that is, an invalid Frame Relay

encapsulation). From RFC 2427:

An NLPID value of 0x00 is defined within ISO/IEC TR 9577 as the Null Network Layer or

Inactive Set. Because it cannot be distinguished from a pad field, and because it has no

significance within the context of this encapsulation scheme, an NLPID value of 0x00 is invalid

under the Frame Relay encapsulation.

Conditions: Traffic should be enabled while doing local switching configurations.

Workaround: There is no easy workaround. Shut down the interface before the hw-module reload of

the linecard.

• CSCsx69785

Symptoms: 8-port OC48 E6 linecards crash when trying to bring up back-to-back connected or

looped back (between two OC48 interfaces on the same E6 linecard) interfaces. This can also be

seen when the optic cable/SFP is removed and inserted continuously between the back-to-back or

loopback OC48 interfaces on the E6 linecard.

Conditions: On back-to-back connected or loopback (through two ports on the same linecard)

connected E6 OC48 ports, performing a shut/no shut crashes the E6 linecards. Also, removing and

inserting the optic cable/SFP repeatedly in the back-to-back or loopback connection (which is in the

“no shut” state) between two OC48 ports on E6 cards crashes the E6 linecard.

Workaround: Configure clock source internal before configuring no shut.

• CSCsx81775

Symptoms: An Engine 5 line card (SIP-x01) crashes when a QoS configuration is applied to a serial

interface.

Conditions: This symptom is observed when applying a service policy to a serial interface with

several classes with a Police + WRED configuration, with more than two of the following:

1. Class-default with WRED+Police action.

2. One or more classes matching on prec/dscp with WRED+Police action.

3. One or more classes matching on Access-group with WRED+Police action.

4. Any class with a “Match Any” condition with WRED+Police.

Workaround: There is no workaround. Such a policy is not supported.

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