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Cisco 300 Series

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Routing Resources

Use the Routing Resources page to display TCAM allocation and modify total TCAM size. TCAM entries are divided into the following groups:

  • IP Entries—TCAM entries reserved for IP static routes, IP addresses on the device, and IP hosts. Each type generates the following number of TCAM entries:
    • IPv4 static routes—One entry per route
    • IP Addresses—Two entries per IP address
    • IP Hosts—One entry per host
  • Non-IP Entries—TCAM entries reserved for other applications, such as ACL rules, CoS policers, and VLAN rate limits.

To view and modify router resources:

  1. Click Administration > Routing Resources.
  2. The following fields are displayed:

    • NeighborsCount is the number of neighbors recorded on the device and TCAM Entries is the total number of TCAM entries being used for neighbors.
    • InterfacesCount is the number of IP addresses on interfaces on the device and TCAM Entries is the total number of TCAM entries being used for the IP addresses.
    • RoutesCount is the number of routes recorded on the device and TCAM Entries is the total number of TCAM entries being used for the routes.
    • Total—Displays the number of TCAM entries which are currently being used.
    • Maximum Entries—Select one of the following options:
    • Use Default—The number of TCAM entries available for IP entries is 25% of the TCAM size (128).
    • User Defined—Enter a value up to 512 entries.

    You must save your current configuration before changing the TCAM Allocation Settings.

    NOTE     A summary of the TCAM entries actually in use and available is displayed at the bottom of this page. For an explanation of the fields, see Viewing TCAM Utilization.

  3. Save the new settings by clicking Apply. This checks the feasibility of the TCAM allocation. If it is incorrect, an error message is displayed. If it is correct, the allocation is saved to the Running Configuration file and a reboot is performed.