Specifications

1216
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(28)S
– The IPv6 RIB must have recursive entries that form a loop, for example:
Router# show ipv6 route
IPv6 Routing Table - 9 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
B ::/0 [200/0]
via 2::2
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.
• CSCed20379
Symptoms: A 6-port CT3 line card crashed due to a Cache Parity Exception. The router will not
reload.
Conditions: This symptom occurs on a Cisco 12000 series router that is running Cisco IOS
Release 12.0(23)S3 image c12kprp-p-mz.
Workaround: There is no workaround.
• CSCed21111
Symptoms: There is no console response from the primary or secondary route processor.
Conditions: This symptom occurs after the redundancy force-failover main-cpu EXEC command
is sent for the second cutover.
Workaround: There is no workaround.
• CSCed22100
Symptoms: An ingress Engine 4 plus POS line card may drop fragmented packets.
Conditions: These symptoms occur in an IP-to-IP scenario under the following conditions:
– The IP packet size is 28 bytes.