Specifications

85
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
delay as part of the metric (for example, Enhanced Interior Gateway Routing Protocol (EIGRP)),
and might cause the routing protocol to take a route through a single interface over a route through
a port channel.
Workaround: Manually configure an appropriate delay under the port channel interface by entering
the delay tens of microseconds interface configuration command.
• CSCdm78020
Performance OC-48 POS and QOC-12 POS line cards might not fragment Multiprotocol Label
Switching (MPLS) packets or send Internet Control Message Protocol (ICMP) messages if the DF
bit is set in the header of the IP Payload of MPLS packets requiring fragmentation.
Workaround: Change the maximum transmission unit (MTU) on the interface to be less than or
equal to the MTU on the next hop.
• CSCdm94154
A Cisco 7200 series router that is configured with a T1 multichannel T1 card might not show any
errors while a remote Cisco 7000 series router shows cyclic redundancy check (CRC) errors, input
frame errors, or overrun errors. Errors occur, but the counter remains at zero. There is no
workaround.
• CSCdp23658
Tunnels that are configured for multicast routing and multicast distributed switching might cause a
Cisco 12000 series Gigabit Switch Router (GSR) to reload with a bus error.
Workaround: Do not configure the tunnel for multicast routing by entering the ip pim {foo-mode}
interface configuration command. If you must configure the tunnel interface for multicast routing,
enter the no ip mroute-cache interface configuration command.
• CSCdp48087
A Cisco 12000 series Gigabit Switch Router (GSR) with dual gigabit route processors (GRPs)
might exhibit the following error message if the primary GRP reloads and the secondary GRP takes
over:
%FIB-3-FIBDISABLE: Fatal error, slot 2: No window > message, LC to RP IPC is
non-operational
This error message will disable the line card, and the line card must be reloaded manually before
it comes back online. There is no workaround.
• CSCdp51945
On a Cisco 7500 series RSP router, a Simple Network Managment Protocol (SNMP) get query of
cieNumberOfConnections (.1.3.6.1.4.1.9.9.52.1.3.1.0) results in spurious access. This condition
can also lead to a memory leak in the IP SNMP process. There is no workaround.
• CSCdp56613
When fast-switching an IP frame that is fewer than 46 bytes in length to an ATM interface, the
router always sets the length in the ATM adaption layer 5 (AAL5) header to 54 bytes even though
the length should be equal to the IP frame length plus the length of the AAL5 header, which is 8
bytes. There is no workaround.
• CSCdp58964
A Cisco router that is running Cisco IOS Release 12.0(7)S or Cisco IOS Release 12.0(8)S will
disable Cisco Express Forwarding (CEF) with a FIB-3-NOMEM failure even though there appears
to be plenty of memory. There is no workaround.