Cisco Cisco Fiber IGESM Switch Module for IBM

The monitor session is placed in inactive state if a port is configured to be a Switched Port Analyzer 
(SPAN) destination port in a SPAN session and if a source port is not configured. While in this state, 
the source port cannot send and receive traffic, and no address learning occurs on the destination 
port. (CSCed20563)

These are the workarounds:

Identify a source port for the SPAN session.

Disable the SPAN session, and remove the designation of destination port for the port.

Use the shutdown and no shutdown interface configuration commands on the designated 
destination port.

Note that the switch default native vlan is VLAN 2, not VLAN 1, on the switch external 10/100/1000 
ports (ports 17 to 20). The native VLAN of a trunk interface can be removed from the allowed VLAN 
list. This can affect IP connectivity to the switch management VLAN.

The workaround is to add the native VLAN back to the allowed VLAN list on the trunk interface. 
(CSCed25956)

When connected to some third-party devices that send early preambles, a switch port operating at 
100 Mbps full duplex or 100 Mbps half duplex might bounce the line protocol up and down. The 
problem occurs only when the switch is receiving frames. 

The workaround is to configure the port for 1000 Mbps and full duplex or to connect a hub or a 
nonaffected device to the switch. (CSCed39091)

If the switch is running IEEE 802.1w rapid STP (RSTP) mode and a directly connected switch is 
running IEEE 802.1D per-VLAN spanning-tree plus (PVST+), the switch runs PVST+ as expected. 
However, if the connected switch changes its configuration to RSTP, the switch continues to send 
IEEE 802.1D BPDUs instead of sending IEEE 802.1w BPDUs.

The workaround is to use the clear spanning-tree detected-protocols privileged EXEC command 
to restart the protocol migration process (force the renegotiation with neighboring switches). 
(CSCed40295)

All unknown unicast and broadcast traffic in an EtherChannel are sent to the port configured as the 
designated port. If this is the only type of traffic on the EtherChannel, it could reduce the aggregate 
bandwidth and speed on this port. (CSCed47701)

When using the police policy-map class configuration command on Gigabit-capable Ethernet ports, 
a value less than 8192 can cause the service policy configuration to fail.

The workaround is to enter a burst-byte value that is greater than or equal to 8192. (CSCed63013)

If a switch receives STP packets and non-STP packets that have a CoS value of 6 or 7 and all of these 
packets belong to the same management VLAN, a loop might occur. 

These are the workarounds:

Change the CoS value of the non-STP packets to a value other than 6 or 7.

If the CoS value of the non-STP packets must be 6 or 7, configure these packets to belong to a 
VLAN other than the management VLAN. (CSCed88622)

If the switch does not receive traffic from stations in the network, it prematurely removes and then 
re-adds their dynamic MAC addresses from the MAC address table. This causes temporary flooding 
when the switch receives a packet for the affected addresses.

There is no workaround. (CSCed92062)