Specifications

1358
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S1
C 1::/64 [0/0]
via ::, Ethernet0/0
L 1::2/128 [0/0]
via ::, Ethernet0/0
C 2::/64 [0/0]
via ::, Ethernet1/0
L 2::1/128 [0/0]
via ::, Ethernet1/0
B 2001::/16 [200/0]
via 2002::1
B 2002::/16 [200/0]
via 2001::1
L FE80::/10 [0/0]
via ::, Null0
L FF00::/8 [0/0]
via ::, Null0
Note that 2001::/16 and 2002::/16 results in a recursion loop because 2001::/16 is accessible via
2002::/16 and 2002::/16 is accessible via 2001::/16.
Workaround: Disable IPv6 CEF using the global configuration command no ipv6 cef.
• CSCed23828
Symptoms: L2 fragmentation does not happen for packets greater than the network Maximum
Transmission Unit (MTU). Packets are dropped.
Conditions: This symptom occurs when distributed Cisco Express Forwarding (dCEF) is enabled on
RSP.
Workaround: User can either turn dCEF off or configure MTU, which is equal to the network MTU
on the customer edge (CE) routers.
• CSCed26664
Symptoms: The output packet counters on an interface may be incorrect. Depending on the
Cisco IOS release, they may show either a very large value or zero.
Conditions: The output packet counters get corrupted by clearing the interface counters followed by
reloading the PXF microcode. The commands are the clear counters command followed by the
microcode reload pxf command.
Workaround: Issue another clear counters command.
• CSCed29519
Symptoms: An Engine 4+ GE line card stops forwarding Multiprotocol Label Switching (MPLS)
VPN traffic.
Conditions: This symptom occurs after Cisco Express Forwarding (CEF) on the line card is cleared.
Workaround: Enter the shut command followed by the no shut command on the line card.
• CSCed29776
Symptoms: traffic-shape disappears from the running- configuration after HA switchover and it is
not possible to re-configure it on the newly active route processor.
Conditions: If traffic-shape is configured on an Engine 4+ interface on a Cisco 12000 series router
with multiple route processors installed and HA switchover occurs, traffic-shape may disappear
from the running-configuration. It is not possible to reconfigure it in the running-configuration.