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

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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
Quality of Service (QoS)
• 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)
• When you use the srr-queue bandwidth limit interface configuration command to limit port
bandwidth, packets that are less than 256 bytes can cause inaccurate port bandwidth readings. The
accuracy is improved when the packet size is greater than 512 bytes. There is no workaround.
(CSCsg79627)
• If QoS is enabled on a switch and the switch has a high volume of incoming packets with a maximum
transmission unit (MTU) size greater than 1512 bytes, the switch might reload.
Use one of these workarounds:
– Use the default buffer size.
– Use the mls qos queue-set output qset-id buffers allocation1 ... allocation4 global
configuration command to allocate the buffer size. The buffer space for each queue must be at
least 10 percent. (CSCsx69718)
• If you configure a large number of input interface VLANs in a class map, a traceback message
similar to this might appear:
01:01:32: %BIT-4-OUTOFRANGE: bit 1321 is not in the expected range of 0 to 1024
There is no impact to switch functionality.
There is no workaround. (CSCtg32101)
RADIUS
RADIUS change of authorization (COA) reauthorization is not supported on the critical auth VLAN.
There is no workaround. (CSCta05071)
Routing
• The switch stack might reload if the switch runs with this configuration for several hours, depleting
the switch memory and causing the switch to fail:
– The switch has 400 Open Shortest Path First (OSPF) neighbors.
– The switch has thousands of OSPF routes.