Cisco Cisco IOS Software Release 12.2(55)SE

When the configuration file is removed from the switch and the switch is rebooted, port status for 
VLAN 1 and the management port (Fast Ethernet 0) is sometimes reported as 

up

 and sometimes as 

down

, resulting in conflicts. This status depends on when you respond to the reboot query: 

Would you like to enter the initial configuration dialog?

After a reboot if you wait until the Line Protocol status of VLAN 1 appears on the console 
before responding, VLAN 1 line status is always shown as 

down

. This is the correct state.

The problem (VLAN 1 reporting 

up

) occurs if you respond to the query before VLAN 1 line 

status appears on the console. 

The workaround is to wait for approximately 1 minute after rebooting and until the VLAN 1 
interface line status appears on the console before you respond to the query. (CSCsl02680)

When you configure the ip igmp max-groups number and ip igmp max-groups action replace 
interface configuration commands and the number of reports exceed the configured max-groups 
value, the number of groups might temporarily exceed the configured max-groups value. No 
workaround is necessary because the problem corrects itself when the rate or number of IGMP 
reports are reduced. (CSCse27757)

When you configure the IGMP snooping throttle limit by using the ip igmp max-groups number 
interface configuration on a port-channel interface, the groups learned on the port-channel might 
exceed the configured throttle limit number, when all of these conditions are true:

The port-channel is configured with member ports across different switches in the stack.

When one of the member switches reloads.

The member switch that is reloading has a high rate of IP IGMP joins arriving on the 
port-channel member port.

The workaround is to disable the IGMP snooping throttle limit by using the no ip igmp max-groups 
number interface configuration command and then to reconfigure the same limit again. 
(CSCse39909)

When QoS is enabled and the egress port receives pause frames at the line rate, the port cannot send 
packets. 

There is no workaround. (CSCeh18677)

Egress shaped round robin (SRR) sharing weights do not work properly with system jumbo MTU 
frames.

There is no workaround. (CSCsc63334)

In a hierarchical policy map, if the VLAN-level policy map is attached to a VLAN interface and the 
name of the interface-level policy map is the same as that for another VLAN-level policy map, the 
switch rejects the configuration, and the VLAN-level policy map is removed from the interface.

The workaround is to use a different name for the interface-level policy map. (CSCsd84001)

If the ingress queue has low buffer settings and the switch sends multiple data streams of system 
jumbo MTU frames at the same time at the line rate, the frames are dropped at the ingress.

There is no workaround. (CSCsd72001)