Cisco Cisco IOS Software Releases 12.2 MC
12
Release Notes for Cisco MGX-RPM-1FE-CP Back Card for Cisco IOS Release 12.2(15)MC2f
OL-2920-11
Caveats in Cisco IOS Release 12.2(15)MC2b
Resolved Caveats
This section lists the caveats that are resolved in Release 12.2(15)MC2b.
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CSCec86420
Description: Cisco routers running Cisco IOS supporting Multi Protocol Label Switching (MPLS)
are vulnerable to a Denial of Service (DoS) attacks on the MPLS disabled interfaces.
are vulnerable to a Denial of Service (DoS) attacks on the MPLS disabled interfaces.
This vulnerability is only present in Cisco IOS release trains based on 12.1T, 12.2, 12.2T, 12.3 and
12.3T. Releases based on 12.1 mainline, 12.1E and all releases prior to 12.1 are not vulnerable.
12.3T. Releases based on 12.1 mainline, 12.1E and all releases prior to 12.1 are not vulnerable.
This bug is a complementary fix to CSCeb56909 which addresses this vulnerability.
More details can be found in the security advisory which is posted at:
http://www.cisco.com/warp/public/707/cisco-sa-20050126-les.shtml
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CSCed85438
Description: A Fast Ethernet 100BASE-TX port adapter on an RPM-PR may stop receiving burst
traffic packets.
traffic packets.
This symptom is observed on a FE RPM-PR Backcard. To identify this problem, the output of the
show interface fastethernet command shows no input packets and all packets as overrun:
show interface fastethernet command shows no input packets and all packets as overrun:
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 100000 bits/sec, 106 packets/sec
0 packets input, 0 bytes
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 263523 overrun, 0 ignored
The output of the show controllers command for the Fast Ethernet interface shows high numbers
for “rx_fifo_overflow” and “throttled”:
for “rx_fifo_overflow” and “throttled”:
throttled=5352, enabled=5352, disabled=0
rx_fifo_overflow=434500, rx_no_enp=0, rx_state=0
Workaround: To clear the symptom, enter the shutdown interface configuration command
followed by the no shutdown interface configuration command on the Fast Ethernet interface.
followed by the no shutdown interface configuration command on the Fast Ethernet interface.
Further Problem Description: In the output of the show controllers command for the Fast
Ethernet interface, locate the value for CFRV. If the last byte is either 0x20, 0x21, 0x22, or 0x23,
the Fast Ethernet is susceptible to the symptom.
Ethernet interface, locate the value for CFRV. If the last byte is either 0x20, 0x21, 0x22, or 0x23,
the Fast Ethernet is susceptible to the symptom.
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CSCsa81379
Description: NetFlow Feature Acceleration CLI.
NetFlow Feature Acceleration has been deprecated and removed from Cisco IOS. The global
command ip flow-cache feature-accelerate will no longer be recognized in any IOS configuration.
command ip flow-cache feature-accelerate will no longer be recognized in any IOS configuration.
If your router configuration does not currently contain the command ip flow-cache
feature-accelerate, this change does not affect you.
feature-accelerate, this change does not affect you.
This removal does not require an upgrade of your existing installation.
The removal of NetFlow Feature Acceleration does not affect any other aspects of Netflow
operation, for example Access-list processing. The features are separate and distinct.
operation, for example Access-list processing. The features are separate and distinct.
Cisco Express Forwarding (CEF) supersedes the deprecated NetFlow Feature Acceleration.