Release Notes for Cisco Catalyst Blade Switch 3120 for HP, Cisco IOS Release 12.2(50)SE and Later

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Release Notes for Cisco Catalyst Blade Switch 3120 for HP, Cisco IOS Release 12.2(50)SE and Later
OL-18270-03
Limitations and Restrictions
• When switches are installed closely together and the uplink ports of adjacent switches are in use,
you might have problems accessing the SFP module bale-clasp latch to remove the SFP module or
the SFP cable (Ethernet or fiber). Use one of these workarounds:
– Allow space between the switches when installing them.
– In a switch stack, plan the SFP module and cable installation so that uplinks in adjacent stack
members are not all in use.
– Use a long, small screwdriver to access the latch, and then remove the SFP module and cable.
(CSCsd57938)
• When a Cisco X2-10GB-CX4 transceiver module is in the X2 transceiver module port and you enter
the show controllers ethernet-controller tengigabitethernet privileged EXEC command, the
command displays some fields as unspecified. This is the expected behavior based on IEEE 802.3ae.
(CSCsd47344)
• The far-end fault optional facility is not supported on the GLC-GE-100FX SFP module. The
workaround is to configure aggressive UDLD. (CSCsh70244).
Configuration
These are the configuration limitations:
• If a half-duplex port running at 10 Mb/s receives frames with Inter-Packet Gap (IPG) that do not
conform to Ethernet specifications, the switch might stop sending packets.
There is no workaround. (CSCec74610)
• When an excessive number (more than 100 packets per second) of Address Resolution Protocol
(ARP) packets are sent to a Network Admission Control (NAC) Layer 2 IP-configured member port,
a switch might display a message similar to this:
PLATFORM_RPC-3-MSG_THROTTLED: RPC Msg Dropped by throttle mechanism: type 0, class
51, max_msg 128, total throttled 984323
-Traceback= 6625EC 5DB4C0 5DAA98 55CA80 A2F2E0 A268D8
No workaround is necessary. Under normal conditions, the switch generates this notification when
snooping the next ARP packet. (CSCse47548)
• When there is a VLAN with protected ports configured in fallback bridge group, packets might not
be forwarded between the protected ports.
The workaround is to not configure VLANs with protected ports as part of a fallback bridge group.
(CSCsg40322)
When a switch port configuration is set at 10 Mb/s half duplex, sometimes the port does not send in
one direction until the port traffic is stopped and then restarted. You can detect the condition by
using the show controller ethernet-controller or the show interfaces privileged EXEC commands.
The workaround is to stop the traffic in the direction in which it is not being forwarded, and then
restart it after 2 seconds. You can also use the shutdown interface configuration command followed
by the no shutdown command on the interface. (CSCsh04301)
• When line rate traffic is passing through a dynamic port, and you enter the switchport access vlan
dynamic interface configuration command for a range of ports, the VLANs might not be assigned
correctly. One or more VLANs with a null ID appears in the MAC address table instead.
The workaround is to enter the switchport access vlan dynamic interface configuration command
separately on each port.(CSCsi26392)