Administration: Diagnostics
Viewing CPU Utilization and Secure Core Technology
141 Cisco 500 Series Stackable Managed Switch Administration Guide
8
- Active—Both source and destination interfaces are up and forwarding
traffic.
- Not Ready—Either source or destination (or both) are down or not
forwarding traffic for some reason.
STEP 2 Click Add to add a port or VLAN to be mirrored.
STEP 3 Enter the parameters:
• Destination Port—Select the analyzer port to where packets are copied. A
network analyzer, such as a PC running Wireshark, is connected to this port.
If a port is identified as an analyzer destination port, it remains the analyzer
destination port until all entries are removed.
• Source Interface—Select the source port or source VLAN from where
traffic is to be mirrored.
• Type—Select whether incoming, outgoing, or both types of traffic are
mirrored to the analyzer port. If Port is selected, the options are:
- Rx Only—Port mirroring on incoming packets.
- Tx Only—Port mirroring on outgoing packets.
- Tx and Rx—Port mirroring on both incoming and outgoing packets.
STEP 4 Click Apply. Port mirroring is added to the Running Configuration.
Viewing CPU Utilization and Secure Core Technology
The device handles the following types of traffic, in addition to end-user traffic:
• Management traffic
• Protocol traffic
• Snooping traffic
Excessive traffic burdens the CPU, and might prevent normal device operation.
The device uses the Secure Core Technology (SCT) feature to ensure that the
device receives and processes management and protocol traffic, no matter how
much total traffic is received
. SCT is enabled by default on the device and cannot
be disabled.
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