Status and Statistics
TCAM Utilization
Cisco 500 Series Stackable Managed Switch Administration Guide 28
2
TCAM Utilization
The device architecture uses a Ternary Content Addressable Memory (TCAM) to
support packet actions in wire speed.
TCAM holds the rules produced by applications, such as ACLs (Access Control
Lists), Quality of Service (QoS), IP Routing and user-created rules.
Some applications allocate rules upon their initiation. Additionally, processes that
initialize during system boot use some of their rules during the startup process.
To view TCAM utilization, click Status and Statistics > TCAM Utilization.
The following fields are displayed for SG500X/SG500XG devices and for Sx500
devices in Layer 3 system mode and when the device is part of a stack (per unit):
• Unit No—Unit in stack for which TCAM utilization appears. This is not
displayed when the device is in standalone mode.
• Maximum TCAM Entries for Routing and Multicast Routing—Maximum
TCAM entries available for routing and Multicast Routing.
• IPv4 Routing
- In Use—Number of TCAM entries used for IPv4 routing.
- Maximum—Number of available TCAM entries that can be used for IPv4
routing.
• IPv4 Multicast Routing
- In Use—Number of TCAM entries used for IPv4 Multicast routing.
- Maximum—Number of available TCAM entries that can be used for IPv4
Multicast routing.
• IPv6 Routing
- In Use—Number of TCAM entries used for IPv6 Multicast routing.
- Maximum—Number of available TCAM entries that can be used for IPv6
Multicast routing.
• IPv6 Multicast Routing—Number of TCAM entries used for IPv6 routing.
- In Use—Number of TCAM entries used for IPv6 routing.
- Maximum—Number of available TCAM entries that can be used for IPv6
routing.
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