Cisco Cisco IOS Software Release 15.2(3)E
25
Release Notes for the Catalyst 3750-X and 3560-X Switches, Cisco IOS Release 15.2(3)E and Later
OL-29707-01
Important Notes
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Cisco Trust Security (CTS) MACsec cannot be configured on the C3KX-SM-10G service module
until the POST test has been completed. Wait approximately 45 seconds after the module is inserted
before you configure CTS MACsec on the port. (CSCuc20819)
until the POST test has been completed. Wait approximately 45 seconds after the module is inserted
before you configure CTS MACsec on the port. (CSCuc20819)
Important Notes
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Switch Stack Notes
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Always power off a switch before adding or removing it from a switch stack.
Control Plane Protection
Catalyst 3750-X and 3560-X switches internally support up to 16 different control plane queues. Each
queue is dedicated to handling specific protocol packets and is assigned a priority level. For example,
STP, routed, and logged packets are sent to three different control plane queues, which are prioritized in
corresponding order, with STP having the highest priority. Each queue is allocated a certain amount of
processing time based on its priority. The processing-time ratio between low-level functions and
high-level functions is allocated as 1-to-2. Therefore, the control plane logic dynamically adjusts the
CPU utilization to handle high-level management functions as well as punted traffic (up to the maximum
CPU processing capacity). Basic control plane functions, such as the CLI, are not overwhelmed by
functions such logging or forwarding of packets.
queue is dedicated to handling specific protocol packets and is assigned a priority level. For example,
STP, routed, and logged packets are sent to three different control plane queues, which are prioritized in
corresponding order, with STP having the highest priority. Each queue is allocated a certain amount of
processing time based on its priority. The processing-time ratio between low-level functions and
high-level functions is allocated as 1-to-2. Therefore, the control plane logic dynamically adjusts the
CPU utilization to handle high-level management functions as well as punted traffic (up to the maximum
CPU processing capacity). Basic control plane functions, such as the CLI, are not overwhelmed by
functions such logging or forwarding of packets.
Cisco IOS Notes
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Unlike other platforms, the response to an Energywise query on a Catalyst 3750-X or 3560-X is
the actual switch power consumption and not a fixed number.
the actual switch power consumption and not a fixed number.
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If the switch requests information from the Cisco Secure Access Control Server (ACS) and the
message exchange times out because the server does not respond, a message similar to this appears:
message exchange times out because the server does not respond, a message similar to this appears:
00:02:57: %RADIUS-4-RADIUS_DEAD: RADIUS server 172.20.246.206:1645,1646 is not
responding.
If this message appears, make sure that there is network connectivity between the switch and the
ACS. You should also make sure that the switch has been properly configured as an AAA client on
the ACS.
ACS. You should also make sure that the switch has been properly configured as an AAA client on
the ACS.
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If the switch has interfaces with automatic QoS for voice over IP (VoIP) configured and you upgrade
the switch software, when you enter the auto qos voip cisco-phone interface configuration
command on another interface, you might see this message:
the switch software, when you enter the auto qos voip cisco-phone interface configuration
command on another interface, you might see this message:
AutoQoS Error: ciscophone input service policy was not properly applied