Specifications

88
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
disables ip route-cache cef by default, and it has changed the forwarding behavior as well. When
the command is disabled, packets will not be routed through the GSR if they come in on this
interface.
Workaround: Upgrading past CSCdr21181 will allow you to configure the ip route-cache cef
command, and the command will survive all consecutive reloads if you save it to NVRAM.
• CSCdr23697
When distributed Cisco Express Forwarding (dCEF) is enabled on spatial reuse protocol (SRP) IP
doing sam- interface routing, on a Cisco 7500 router that is running Cisco IOS Release 12.0(8)S,
traffic will not be sent out the SRP interface.
Workaround: Change from first-in first-out (FIFO) to priority queueing (PQ).
• CSCdr24628
An OC-48E/POS line card might restart with a software forced crash. This condition occurs due to
Multicast, and the following error messages are seen in the log:
LC-3-TBMMCAST: tbmm_tbl_remove_ent_port: invalid hw_mdb/midb
LC-3-TBMMCAST: tbmm_remove_ent_port: port not set
Workaround: Remove Multicast from the configuration.
• CSCdr24842
If input MAC accounting is configured on an interface, misaligned read accesses might be
encountered on the Cisco 7500 series route switch processor (RSP). The show alignment command
should be entered to determine if misaligned accesses are occurring.
Workaround: Disable input MAC accounting on the interface.
• CSCdr25771
A Cisco 12000 series gigabit switch router (GSR) spatial reuse protocol (SRP) line card might
reload when a node on the SRP ring contains a MAC address that ends with the value 0800 or 8847.
Workaround: Change the value of the last two bytes of the MAC address.
• CSCdr27954
Under rare circumstances, the processing of re-resolving a previously known Address Resolution
Protocol (ARP) entry might cause errors in the packet switch ASIC (PSA) access control list (ACL)
processing, which leads to the incorrect blocking of packets into a PSA-enabled card. This
condition occurs when output ACLs are configured on the Gigabit Ethernet (GE) interface and PSA
ACLs are in the inbound direction on the PSA card.
Workaround: Remove either the input or the output ACL and reapply it, which forces a rebuild of
the PSA data structures and clears the problem.
• CSCdr28169
A Cisco router that is running Cisco IOS Release 12.0 S might reload or experience spurious
memory access if set atm-clp is configured in an attached policy map and then removed while the
policy map is still attached. This situation might also occur if a policy map that is configured with
set atm-clp is attached and detached from an interface. There is no workaround.
• CSCdr29540
A Cisco 12000 series gigabit switch router (GSR) with dual gigabit route processors (GRPs) that
is running Cisco IOS Release 12.0(9.6)S or 12.0(10)S might experience difficulties with the serial
console after a failover. Both GRPs in a GSR dual GRP setup might have individual serial console
connections (for example, there is no “Y” cable). If you use the serial console that is attached to
the secondary GRP then this is automatically connected through to a vty on the primary GRP. If
there is a failover while the secondary console is in use, the console is not released from the vty