Specifications

51
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
Caveats
• CSCdp58522
Cisco OC-48c/STM16c and Cisco QOC-12 line cards for the Cisco 12000 series Gigabit Switch
Router (GSR) are not differentiating outgoing traffic by protocol type. There is no workaround.
• CSCdp74436
Entering the write memory command simultaneously on both the console and a vty might cause a
Cisco router to pause indefinitely. The write memory command should not be entered
simultaneously on different vtys. There is no workaround.
• CSCdp83097
A Cisco router that is running Cisco IOS Release 12.0(7)S1 or an earlier release might experience
a Versatile Interface Processor (VIP) reload with the following traceback:
0x60258C84:tag_fib_iterate(0x60258c08)+0x7c
0x6025A9BC:tfib_stats_background(0x6025a8e0)+0xdc
0x6009AFAC:r4k_process_dispatch(0x6009af98)+0x14
0x6009AF98:r4k_process_dispatch(0x6009af98)+0x0
There is no workaround.
• CSCdr03667
The limitation of VC-per-VP on the Cisco 12000 series Gigabit Switch Router (GSR) is different
from the limitation on the Cisco 7500/RSP series router. The Cisco 7500/RSP series router uses
software to determine the VC-per-VP value, but the Cisco 12000 series GSR has Segmentation and
Reassembly (SAR) hardware that contains a VC-per-VP limitation. This limitation requires the
Virtual Channel Identifier (VCI) value to start from 0. There is no workaround.
• CSCdr07940
A Cisco router might reload if a load-sharing route changes while a show ip cef detail command
is waiting at the More prompt displaying that route. There is no workaround.
• CSCdr21358
Cisco Express Forwarding (CEF) per-packet load sharing is not supported when the inbound line
card is an Engine 2 (PSA-based) card. This DDTS adds a warning message so that if you attempt
to configure per-packet load sharing, the warning message informs you that the feature is not
supported. There is no workaround.
• CSCdr35034
Cisco 12000 series Gigabit Switch Routers (GSRs) do not support non-Multiprotocol Label
Switching (MPLS) tunnels, and non-MPLS tunnels should not be configured even though these
tunnels are configurable using the command-line interface. There is no workaround.
• CSCdr49770
A quad OC-3c/STM-1c Packet-over-SONET (POS) line card might reload with a bus error
exception when a remote router is disconnected. There is no workaround.
• CSCdr58167
A Cisco 12000 series Gigabit Switch Router (GSR) might display an “Rx-SAR” error message if
the ATM Multi Point-to-Point Switched Virtual Circuit IP Multicast feature is enabled on Engine 0
line cards (for example, a 1-Port OC-12 ATM line card) in a network with approximately 300
Internet Group Management Protocol (IGMP) Multicast groups with 2500 Kbps of Multicast
bidirectional traffic.
Workaround: Reduce the Multicast traffic rate, or do not allow the network to reach 300 IGMP
groups.