Specifications

144
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(2)
• CSCdk36767
EIP interfaces on a Cisco 7500 series router running Cisco IOS Release 11.2.13 starts flapping and
then goes into an up and down state. Issuing the shutdown command, followed by the
no shutdown command does not bring them back. You must do a microcode reload to stabilize the
box. Or a reload of the box also normalizes the status.
Workaround: Perform a microcode reload periodically (every day during maintenance time period),
or upgrade EIP microcode to latest version
• CSCdk39102
Beginning with Cisco IOS Release 11.3(5.1), a Cisco 1600 series router configured with Frame
Relay encapsulation might fail in Frame Relay compression (FRF.9).
• CSCdk39193
HSSI3 H2T microcode does not RX/TX unless both RX/TX clocks are present, because the HSSI3
code waits for the a chip reset to be done at the beginning of the code. However, chip reset is only
done at boot time or during online insertion/removal (OIR).
• CSCdk39936
Fast Ethernet port adapter full-duplex interfaces bounce up and down when configured in Fast
EtherChannel (FEC). A workaround is to use the port adapters in half-duplex mode when they are
FEC members or unconfigure FEC.
• CSCdk44597
The PA-A1 ATM adapter cannot transmit OAM cells. There is no workaround.
• CSCdk46966
If CEF switching is enabled and an IP address is assigned to an ISL subinterface, if the subinterface
is deleted but the same IP address is assigned to another interface, the router can fail.
• CSCdk51723
Under some circumstances the PA-A3 might cause an RSP restart with an output stuck message.
• CSCdk57555
A Fast Ethernet interface might hang under extreme traffic stress on a Cisco 7200 series router
when used with ATM interface.
• CSCdk57624
When CEF switching is enabled and Fast Ethernet interfaces are configured for flow switching,
CEF-flow switching fails on FEIP, if ISL is configured. Packets are fast switched instead. There is
no workaround.
• CSCdk58799
When using CiscoWorks to manage a PA-MC-T3, it is mistakenly represented by CT3IP.
• CSCdk62768
A Cisco 3600 series router might not send keepalive messages when keepalive is set.
IP Routing Protocols
• CSCdk05172
After issuing the command no distance eigrp 255 255, the inaccessible routes might not be
restored to the routing table. A workaround is to issue the command clear ip eigrp neighbors on
the interfaces of the affected routes.