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    Interface Attachment Resources Overview

    JunosE Software allocates interface attachment resources when policies are attached to interfaces–that is, when you attach a policy to an interface, the policy consumes one of the interface’s attachment resources. Each interface has two attachment resource pools. IP and IPv6 policy attachments are allocated from the interface’s IPv4 attachment resource pool; all other attachments are allocated from the interface’s layer 2 attachment resource pool.

    • The type of line module determines the number of policy attachments supported by interfaces. See ERX Module Guide, Appendix A, Module Protocol Support for more information about supported line modules. See E120 and E320 Module Guide, Appendix A, IOA Protocol Support for information about the modules that support BGP.
    • On ASIC-based line modules (OC48/STM16, GE-2, and GE-HDE line modules), you can have a maximum of 8191 IP policy attachments and 8191 layer 2 policy attachments for ingress policies per forwarding controller, and 8191 IP policy attachments and 8191 layer 2 policy attachments for egress policies per forwarding controller.
    • On FPGA-based line modules, you can have a maximum of 8191 IP policy attachments and 8191 layer 2 policy attachments per forwarding controller.

      You can use the show policy-resources slot command to monitor the policy resource consumption on a specific slot or on all slots to which the policies are attached. The show policy-resources slot command displays the type of policy resource, number of policy resources supported, number of policy resources consumed, number of policy resources that are free, and direction type for each resource type.

      Note: The current system maximums of the E Series router are displayed in the show policy-resources slot command output as the number of policy resources supported by the line module. For the current system maximums, see Appendix A, System Maximums in the JunosE Release Notes.

    Published: 2014-08-14