Cisco Cisco IOS Software Release 12.2(55)SE

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An internal switch port is down when one of these HP Flex 10-Gigabit Ethernet network interface 
cards (NICs) is up:

Flex 522m Mezz

Flex 542m Mezz

Flex 552m Mezz

The workaround is to use the speed nonegotiate interface configuration command on the internal 
port.

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If the Dynamic Trunking Protocol (DTP) is set to speed nonegotiate for two switches that interface 
each other, and the speed/duplex is configured as full/1000, the speed/duplex configuration of one 
of the switches changes to auto/auto when the switch is restarted. The port channel becomes 
incompatible and the second switch’s operation is suspended. This problem applies only to the 
1000BASE-LX interface.

The workaround is to enter the shutdown interface configuration command followed by the no 
shutdown command.

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A port that is programatically configured with auth-default ACL does not allow any traffic on the 
switch except DHCP traffic. If the configurations on the interface are cleared and the interface is 
restarted, the auth-default ACL configuration remains and the problem persists.

There is no workaround.

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During a Telnet session, the router crashes when the TACACS+ server is configured or unconfigured 
(tacacs-server host command) using the single-connection keyword.

The workaround is to not use the single-connection keyword.

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When you enter the show running-config interface configuration command, IP Service Level 
Agreement notifications are shown as enabled even when you have not enabled this configuration 
using the ip sla enable reaction-alerts interface configuration command.

There is no workaround.