Specifications

54
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(9)
• CSCdp17334
The second port on a Cisco router with a PA-2T3 port adapter and a PA-2E3 port adapter will not
come up if the first port is in a shutdown state.
Workaround: Enter the no shutdown interface configuration command on the first port.
• CSCdp24644
If devices that can share the same IP address at different times are connected behind an MPC, some
Multiprotocol over ATM (MPOA) shortcuts might not be valid after they switch over the IP address.
There is no workaround.
• CSCdp24671
If you have two Cisco switches connected on Gigabit Ethernet Inter-Switch Link (ISL) trunk using
SVM 1/1 and with Hot Standby Router Protocol (HSRP) configured on a Gigabit Ethernet port
channel with ISL encapsulation in a Cisco switching module, then the module might reload when
the HSRP group 255 becomes active. This situation can also occur with dot1q(802.1q) trunking.
There is no workaround.
• CSCdp31471
The Available Bit Rate (ABR) feature on the PA-A3 port adapter is not functioning properly. The
PA-A3 driver can send and receive forward resource management (FRM) cells, but cannot transmit
backward resource management (BRM). There is no workaround.
• CSCdp33777
A Cisco router might experience a SIGTRAP exception error and reload. There is no workaround.
• CSCdp36078
Cisco Lock and Key idle timers will not be reset when there are packets that match the dynamic
Access Control Lists (ACLs) created by Lock and Key. There is no workaround.
• CSCdp36878
A Cisco 7500 series router with Multiprotocol Label Switching (MPLS) configured might corrupt
large packets that arrive on a channelized serial interface (CT1/CE1) and then switch to a tag
MPLS-enabled interface. This situation occurs during the fragmentation process of the packet.
Incoming tag MPLS packets are not affected.
This situation only occurs for Route Switch Processor (RSP) switched packets. Versatile Interface
Processor (VIP) distributed switching is not affected. There is no workaround.
• CSCdp42538
A PA-A2 port adapter will not receive packets that are larger than 473 bytes. There is no
workaround.
• CSCdp47338
A Route Switch Processor (RSP) that is configured with Multiprotocol over ATM (MPOA) clients
might reload. There is no workaround.
• CSCdp54245
Multiprotocol over ATM (MPOA) shortcuts might not check for the frame sizes being sent on them.
If the frame size exceeds the maximum transmission unit (MTU) size of the egress Multiprotocol
over ATM Client (MPC), egress MPC drops the packet, resulting in the loss of connectivity.
Workaround: Configure matching MTUs on either side of shortcuts (for example, all LAN
Emulation Clients (LECs) that are served by ingress and egress MPCs should have the same MTU).
If MTUs cannot be altered, then do not configure MPOA on both sides.