Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Uživatelský manuál stáhnout pdf (Strana 80)

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

OL-10394-05 Rev. R0

!--- appropriate traffic rates

policy-map rate-udp-traffic

class rate-udp-class

police 10000 1500 1500 conform-action transmit

exceed-action drop violate-action drop

!--- Apply the Policy-Map to the

!--- Control-Plane of the device

control-plane

service-policy input drop-udp-traffic

Additional information on the configuration and use of the CoPP feature can be found in the

documents, “Control Plane Policing Implementation Best Practices” and “Cisco IOS Software

Releases 12.2 S—Control Plane Policing” at the following links:

http://www.cisco.com/web/about/security/intelligence/coppwp_gs.html and

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html

• CSCtd75248

Symptoms: With QoS is disabled globally and when the ES20 interface is configured as a trunk, if

traffic is sent with a valid COS value, the ES20 re-marks all COS values to “0”.

Conditions: The symptom is observed when QoS is globally disabled.

Workaround: Enable QoS globally using mls qos and trust the ES20 trunk interface to retain CoS

values using mls qos trust cos.

Further Problem Description: This issue is not seen in Cisco IOS Release 12.2(33)SRB. It is present

in Cisco IOS Release 12.2(33)SRC onwards

• CSCtd77905

Symptoms: Traffic will not flow properly for the first VRF, if there is a switchover from active to

standby. This issue occurs because of a race condition.

Conditions: The symptom is observed only in the HA setup.

Workaround: Delete and reconfigure the problematic VRF.

Further Problem Description: The problem is a timing issue. In the standby Supervisor, the

aggregate labels are not getting programmed properly for the first VRF configured in the system.

• CSCtd83819

Symptoms: Traffic drops on SIP400 upon unconfiguring and reconfiguring “bre-connect vlan-id”.

Conditions: The symptom is observed when you unconfigure and reconfigure “bre-connect vlan-id”.

Workaround: Remove and reconfigure the PVC, or reload the SPA, or do an APS switchover.

• CSCtd87264

Symptoms: DHCP unicast BootP offers can not be propagated back in the incoming interface as the

ARP entry is missing. This happens only when the relay function is combined in a VRF and the

incoming interface is unnumbered.

Conditions: The symptom is observed when SRD/SRE Cisco 7600 series router is a DHCP

relay/snooping agent. The request must come in a VRF.

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Cisco 7600-ES20-GE3CXL-RF - Ethernet Services 20G Line Card Switch Uživatelský manuál Strana 80