Cisco Cisco IOS Software Release 12.2(35)SE

These are the configuration limitations:

A static IP address might be removed when the previously acquired DHCP IP address lease expires. 

This problem occurs under these conditions:

When the switch is booted without a configuration (no config.text file in flash memory).

When the switch is connected to a DHCP server that is configured to give an address to it (the 
dynamic IP address is assigned to VLAN 1).

When an IP address is configured on VLAN 1 before the dynamic address lease assigned to 
VLAN 1 expires.

The workaround is to reconfigure the static IP address. (CSCea71176)

On a switch running Cisco IOS Release 12.1(14)AX, when the show interface privileged EXEC is 
entered on a port that is running IEEE 802.1Q, inconsistent statistics from ports running 
IEEE 802.1Q might be reported. 

The workaround is to upgrade to Cisco IOS Release 12.2(25)EY or later. (CSCec35100)

When you change a port from a nonrouted port to a routed port or the reverse, the applied auto-QoS 
setting is not changed or updated when you verify it by using the show running interface or show 
mls qos interface user EXEC commands. 

These are the workarounds:

Disable auto-QoS on the interface.

Change the routed port to a nonrouted port or the reverse.

Re-enable auto-QoS on the interface. (CSCec44169)

The DHCP snooping binding database is not written to flash or a remote file in any of these 
situations: 

When the Network Time Protocol (NTP) is configured, but the NTP clock is not synchronized. 
You can check the clock status by entering the show NTP status privileged EXEC command 
and verifying that the network connection to the NTP server and peer work correctly.