Specifications

120
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(4)
• CSCdk75078
If you observe an increase in the number of retransmission requests (REJs) sent out of a router
interface, an acknowledgment for a received frame was not sent out. This causes a remote station
timer to expire and resend the data. There is no workaround.
• CSCdk75490
A Cisco AS5300 access server that runs Cisco IOS Release 11.3(7.1)T or later releases might have
problems bringing up Layer 2 after ISDN is configured for the first time. This is due to invalid
Layer 2 timer values that can been seen in the configuration. The invalid Layer 2 timer values can
also be seen when you issue the show isdn timers command. Please refer to the following caveats:
CSCdk68552 and CSCdk78782.
Workaround: Save the configuration and reload the router (notice that the error messages because
of the invalid timer values are rejected during the processing of the configuration).
• CSCdk76047
Asynchronous Multilink PPP stops working when a SLIP user gets connected on the asynchronous
interface. There is no workaround.
• CSCdk77092
LAN Emulation (LANE) does not reply to LAN Emulation-Address Resolution Protocol (LE-ARP)
requests if the Bridge-Group Virtual Interface (BVI) Media Access Control (MAC) address is
different from the ATM’s MAC address. As a result, the traffic to the BVI interface gets sent from
the LANE broadcast and unknown server (BUS).
Workaround: Use the same MAC address for both ATM and BVI interfaces.
• CSCdk77947
A Cisco AS5200 access server running Always On/Dynamic ISDN (AO/DI) in Cisco IOS
Release 11.3(6)T1 reloads with unexpected interrupt. There is no workaround.
• CSCdk78063
L2D_Srq_Task() reads status testing for an active connection. When this fails (as it frequently will
the first time) it calls edisms, rechecking status when it returns. It simply retests the status byte,
which is now stale. This fix guarantees the validity of the status byte.
• CSCdk80519
A VIP might reload, followed by an RSP software forced reload. There is no workaround.
• CSCdk80551
Under heavy usage on an X.25 serial link, a Cisco router running TCP to X.25 translation might
reload. There is no workaround.
• CSCdk83115
A system might be restarted by a bus error at PC 0x602E2090, address 0x11755677. There is no
workaround.
• CSCdk84702
Under certain conditions, PAP authentication request packets are leaked. The leaked packets are
not recoverable, and enough memory can be lost that a reload of the router is necessary. There is
no workaround.