Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Manual de usuario descargar pdf (Pagina 316)

762

Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8

OL-10394-05 Rev. R0

• CSCsm53489

Symptoms: Following recovery, all traffic for a VC is lost. All imposition Ethernet Over MPLS

(EoMPLS) entries are missing on core-side SIP-400 linecard. The traffic does not switch back to the

primary TE- FRR tunnel on SIP-400 from backup tunnel on other linecard.

Conditions: The problem is seen in Cisco IOS Release 12.2(33)SRB3.

Workaround: Toggle the primary tunnel. On the primary tunnel performing a shut/no shut switches

the traffic back to the primary tunnel from the backup tunnel.

Further Problem Description: For the TE-FRR scenario in which SIP-400 is the primary/protected

core- side interface, and other linecard is the backup FRR LC/interface; traffic for software EoMPLS

and Virtual Private LAN Services (VPLS) is not restored following a failover and re-optimization.

It appears that software EoMPLS/VPLS core-side imposition entries do not exist on the SIP-400

line-card after re- optimization.

• CSCsm54548

Symptoms: IP “prec to exp” bit marking does not work.

Conditions: This problem rarely occurs in most routers. If the linecard is reset abruptly by SP after

the router is reloaded, there is a possibility that it might occur.

Workaround: Toggle the mlq qos off and on again if the problem occurs.

• CSCsm54873

Symptoms: Embedded Event Manager (EEM) rules may not trigger properly when performing SIP

OIR.

Conditions: EEM policies that interact with the IOS CLI through the command action command

and EEM TCL policies that use the CLI library may not interact properly when triggered. Incorrect

sequencing with the IOS CLI may result when the policies are triggered resulting in the IOS CLI

commands not being invoked.

This problem exists on all shipped versions of IOS XE.

Workaround: There is no workaround.

Further Problem Description: This can impact customers that use the Embedded Event Manager

with EEM applets or policies that interact with the CLI.

It was seen on the ASR platform and other platforms when "sched heapchecks process" was enabled.

A timing issue can cause EEM action CLI commands to not coordinate with the IOS exec properly.

The SIP2 is probably related to the ASR platform. An OIR event is used to trigger the specific EEM

policy. This should occur with any EEM type policy however.

SXF is not impacted by this bug.

• CSCsm57474

Symptoms: A VPDN-group configured with ip mtu adjust and with protocol PPTP, might result in

crash of Cisco IOS 12.4T images. The MTU may not get adjusted on virtual-access on Cisco IOS

12.2SR images.

Conditions: The symptoms are observed when ip mtu adjust is used to set virtual-access to adjust

the MTU based on the outgoing L2TP tunnel IP interface. But this feature is not working for PPTP

tunnels. Cisco IOS 12.4T images may experience a crash and Cisco IOS 12.2SR images may not

adjust the MTU based on the outgoing tunnel interface.

Workaround: Use the ip pmtu instead of ip mtu adjust.

Further Problem Description: The problem is applicable to PPTP and not to L2TP.

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