Release Notes for the Cisco Catalyst Blade Switch 3120 for HP, Cisco IOS Release 15.0(2)SE and Later

11
Release Notes for Cisco Catalyst Blade Switch 3120 for HP, Cisco IOS Release 15.0(2)SE and Later
OL-27316-02
Limitations and Restrictions
Address Resolution Protocol
• The switch might place a port in an error-disabled state due to an Address Resolution Protocol
(ARP) rate limit exception even when the ARP traffic on the port is not exceeding the configured
limit. This could happen when the burst interval setting is 1 second, the default.
The workaround is to set the burst interval to more than 1 second. We recommend setting the burst
interval to 3 seconds even if you are not experiencing this problem. (CSCse06827))
Cisco X2 Transceiver Modules and SFP Modules
• Cisco X2-10GB-LR transceiver modules with a version identification number lower than V03 might
show intermittent frame check sequence (FCS) errors or be ejected from the switch during periods
of operational shock greater than 50 g.
There is no workaround. (CSCse14048)
• Switches with the Cisco X2-10GB-LX4 transceiver modules with a version identification number
before V03 might intermittently fail.
The workaround is to use Cisco X2-10GB-LX4 transceiver modules with a version identification
number of V03 or later. (CSCsh60076)
• 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)
Configuration
• 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)