
506
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
• CSCtb81445
Symptoms: A policy-map with “trust dscp” configured under a class-map is not accepted on a
port-channel interface in ingress for LAN card member-links.
Conditions: The symptom is observed on a Cisco 7600 series router. It is seen when a policy-map is
configured with “trust dscp” under a class map and when this is attached to the port-channel
interface in an ingress direction for the LAN card member-links on it.
Workaround: There is no workaround.
• CSCtb86520
Symptoms: Serial interfaces configured as Multilink Frame Relay (MRF) member links on SONET
APS Protect line card may erroneously be in UP/UP state (they should be UP/DOWN) thereby
resulting in the parent MFR interface being UP/UP, further resulting in dual connected routing
entries in RIB. This causes a service outage as IP flows are forwarded to an APS PROTECT link and
lost.
Conditions: The symptom is observed under the following conditions:
1. A Cisco 7600 series router with two WS-SUP720-3B cards and two OSM-1CHOC12/T1-SI.
2. The router is running Cisco IOS Release 12.2(33)SRB5.
3. Issue may occur during hard reset (removing the power) of the Cisco 7600 series router.
4. Issue is reproducible by enabling member links on Protect MLFR line card first, then enabling
member links on the active MLFR line card like this:
A. Make sure all serial interface are in “shutdown” state.
B. Configure two MFR bundles (say MFR1 and MFR2) and subinterfaces MFR1.1 and MFR2.1
C. Configure four serial interfaces as a member of MFR1 under the OSM-1CHOC12/T1-SI
which is in an inactive state.
D. Configure another four serial interfaces as a member of MFR2 under the
OSM-1CHOC12/T1-SI which is in SONET APS active state.
E. Give “no shut” on the MFR serial member interfaces belonging to SONET APS inactive
OSM-1CHOC12/T1-SI F. Give “no shut” on the MFR serial member interfaces belonging to
SONET APS active OSM-1CHOC12/T1-SI
Observe that all the MFR serial member interfaces configured are in “UP/UP” state and both
(inactive and active OSM-1CHOC12/T1-SIs) MFR interfaces are also UP.
5. Issue does NOT happen under same conditions when using MLPPP or straight serial links. 6.
Issue also reproducible after simple reload in ~40% of reloads.
Workaround 1: Perform a shut, no shut on APS Protect MFR interface.
Workaround 2: Perform a shut on the member links configured under the inactive controller.
• CSCtb88060
Symptoms: When unidirectional Ethernet (UDE) is configured, UDLD configurations are nullified.
On taking out UDE configs, the port should re-participate in UDLD. But is not happening here.
Conditions: The problem is seen if we configure udld port aggressive command.
Workaround: To use the global command udld enable.
• CSCtb89424
Symptoms: In rare instances, a Cisco router may crash while using IP SLA udp probes configured
using SNMP and display an error message similar to the following:
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