Specifications

61
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
• CSCdr31064
Under rare conditions, the Cisco 12000 series Gigabit Switch Router (GSR) switch fabric
redundancy system may experience line card reloads and interprocess communction (IPC) errors
while recovering from a Clock Scheduler Card (CSC) hardware failure. This problem is more
frequent under high traffic load. There is no workaround.
• CSCdr61724
Resolution of recursive routes by Cisco Express Forwarding (CEF) may add 1 to 15 seconds to the
end-to-end route convergence time. There is no workaround.
• CSCdr62580
When a Packet-over-SONET (POS) interface with an OC-48c/STM-16 POS line card on a
Cisco 12008 series Gigabit Switch Router (GSR) is disconnected and then reconnected, the router
may stop functioning and exhibit continuous “%LC-2-INTSCHED” and traceback output
messages. This behavior may also occur when the other end of the POS line is a Cisco 12008 router
that goes down/up. There is no workaround.
• CSCdr69544
A Cisco 12016 or 12012 Gigabit Switch Router (GSR) that is running Cisco IOS
Release 12.0(9.6)ST2 with DC power displays might repeatedly display the following error
messages:
GSR_ENV-0-SHUTDOWN: Slot 24 Inlet sensor temperature at 33 deg C > 0 deg C
GSR_ENV-0-SHUTDOWN: Slot 24 48V supply at 50V < 65408 V
The router does not actually shut down, but the messages display repeatedly. This situation may
also occur with a Cisco 12016 GSR with an AC power supply. There is no workaround.
• CSCdr72018
When an OC-48c/STM-16c Packet-over-SONET (POS) line card is pulled from a Cisco 12000
series Gigabit Switch Router (GSR), no traps are generated. When the card is reseated, both
LinkDown and LinkUp traps are received. When a Gigabit Ethernet (GE) card is pulled, no traps
are generated, and when the card is reseated, only a LinkUp trap is received. There is no
workaround.
• CSCdr84883
Under certain circumstances when the access control list (ACL) matches the type of service (ToS)
bits or Internet Control Message Protocol (ICMP) messages where the packet gets sent to the line
card CPU for processing, the Multiprotocol Label Switching (MPLS) label imposition does not
occur. The packet gets forwarded to the next hop as an IP packet rather than an MPLS packet. The
router in the next hop puts an MPLS label on the packet. This situation does not affect packet flow;
in the case of traffic engineering (TE) tunnels, the packet will be sent as IP and may not go through
the TE tunnel. There is no workaround.
• CSCds01236
A Cisco 7200 or 7500/RSP series router with an ATM-PA3 port adapter might stop forwarding
packets on one or more virtual channels (VCs). In this condition, the packets show up as output
drops on those VCs, and the VCs appear stuck.
Workaround: Enter the shutdown configuration command followed by the no shutdown
configuration command.
• CSCds04454
A single-port Packet-over-SONET (POS) OC-48c/STM-16 Cisco 12000 series Gigabit Switch
Router (GSR) Engine 2 line card may reload intermittently. There is no workaround.