Specifications

1274
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S4
Conditions: This symptom is observed when you enter the rtr responder command for the first time
and you do not reload the router.
Workaround: Reload the router after you have entered the rtr responder command.
• CSCef46191
Symptoms: A specifically crafted Transmission Control Protocol (TCP) connection to a telnet or
reverse telnet port of a Cisco device running Internetwork Operating System (IOS) may block
further telnet, reverse telnet, Remote Shell (RSH), Secure Shell (SSH), and in some cases Hypertext
Transport Protocol (HTTP) access to the Cisco device. Telnet, reverse telnet, RSH and SSH sessions
established prior to exploitation are not affected.
All other device services will operate normally.
Conditions: User initiated specially crafted TCP connection to a telnet or reverse telnet port results
in blocking further telnet sessions. Whereas, services such as packet forwarding, routing protocols
and all other communication to and through the device remains unaffected.
Workaround: The detail advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20040827-telnet.shtml
Interfaces and Bridging
• CSCed65436
Symptoms: A Cisco router may report spurious accesses when configured for Multilink PPP
(MLPPP). This appears to be caused by fragmentation.
%ALIGN-3-SPURIOUS: Spurious memory access made at [hex] reading [hex] %ALIGN-3-TRACE:
-Traceback=[hex]
Conditions: MLPPP must be configured for this symptom to occur.
Workaround: There is no workaround.
• CSCee25605
Symptoms: When you enter the show ip interface brief, the output indicates that a serial
subinterface has a down status and that the protocol is down too:
router# show ip interface brief
Interface IP-Address OK? Method Status Protocol
Ethernet0/0 10.7.0.68 YES NVRAM up up
Ethernet0/1 unassigned YES NVRAM administratively down down
Ethernet0/2 unassigned YES NVRAM administratively down down
Ethernet0/3 unassigned YES NVRAM administratively down down
Ethernet0/4 unassigned YES NVRAM administratively down down
Ethernet0/5 unassigned YES NVRAM administratively down down
Serial4/0 unassigned YES NVRAM administratively down down
Serial4/1 unassigned YES NVRAM administratively down down
Serial4/2 unassigned YES NVRAM administratively down down
Serial4/3 unassigned YES NVRAM administratively down down
Serial4/4 unassigned YES NVRAM administratively down down
Serial4/5 unassigned YES NVRAM administratively down down
Serial4/6 unassigned YES NVRAM administratively down down
Serial4/7 unassigned YES NVRAM administratively down down
Serial5/0:23 10.0.0.1 YES NVRAM down down