Release Notes for Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Release 12.2(40)EX

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Release Notes for Cisco Catalyst Blade Switch 3120 for HP, Cisco IOS Release 12.2(40)EX1
OL-12250-01
Limitations and Restrictions
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)
EtherChannel
These are the EtherChannel limitations:
• In an EtherChannel running Link Aggregation Control Protocol (LACP), the ports might be put in
the suspended or error-disabled state after a stack partitions or a member switch reloads. This occurs
when
– The EtherChannel is a cross-stack EtherChannel with a switch stack at one or both ends.
– The switch stack partitions because a member reloads. The EtherChannel is divided between the
two partitioned stacks, each with a stack master.
The EtherChannel ports are put in the suspended state because each partitioned stack sends LACP
packets with different LACP Link Aggregation IDs (the system IDs are different). The ports that
receive the packets detect the incompatibility and shut down some of the ports. Use one of these
workarounds for ports in this error-disabled state:
– Enable the switch to recover from the error-disabled state.
– Enter the shutdown and the no shutdown interface configuration commands to enable the port.
The EtherChannel ports are put in the error-disabled state because the switches in the partitioned
stacks send STP BPDUs. The switch or stack at the other end of the EtherChannel receiving the
multiple BPDUs with different source MAC addresses detects an EtherChannel misconfiguration.
After the partitioned stacks merge, ports in the suspended state should automatically recover.
(CSCse33842)
• When a switch stack is configured with a cross-stack EtherChannel, it might transmit duplicate
packets across the EtherChannel when a physical port in the EtherChannel has a link-up or
link-down event. This can occur for a few milliseconds while the switch stack adjusts the