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    Sessions and Tunnels Supported

    The E120 and E320 routers support 60,000 L2TP sessions, the ERX1440 router supports 32,000 L2TP sessions, and all other E Series routers support a maximum of 16,000 L2TP sessions. The following guidelines apply:

    • On all E Series routers

      The SM and the ES2-S1 Service IOA both support the termination of 16,000 LNS sessions per module. Therefore, if you want to apply input or output policies and QoS shapers to all of the available LNS sessions, you can only terminate a maximum of 8000 sessions per module.

    • On the E120 router, E320 router, and the ERX1440 router

      You can create a systemwide maximum of 60,000 sessions per E120 or E320 router or 32,000 sessions per ERX1440 router. The maximum number of tunnels supported on the E120, E320, and ERX1440 routers are 16,000, 32,000, and 8,000 respectively. The maximum session limit is spread in any combination across tunnels in the router. For a router that operates as an LAC for some tunnels and as an LNS for others, keep in mind the following conditions:

      • Combined total of LAC and LNS tunnels should not exceed the maximum tunnel limit.
      • Combined total of LAC and LNS sessions should not exceed the maximum session limit.
    • On all E Series routers except the ERX1440 router, E120 router, and the E320 router

      You can create a systemwide maximum of 16,000 sessions spread in any combination across a maximum of 8000 tunnels shared between an LAC and an LNS. For a router that operates as an LAC for some tunnels and as an LNS for others, keep in mind the following conditions:

      • Combined total of LAC and LNS tunnels should not exceed 8,000 tunnels.
      • Combined total of LAC and LNS sessions should not exceed 16,000 sessions.

      Note: In previous releases, the JunosE Software required that you use the license l2tp-session command to configure a license to enable support for the maximum allowable L2TP sessions on ERX1440 routers, E120 routers, and E320 routers. The license l2tp-session command still appears in the CLI, but it has no effect on the actual enforced limit. The reported license limit is 60,000. The show license l2tp-session command also still appears in the CLI.

    • To obtain the maximum number of ingress and egress policy attachments supported for L2TP sessions, see JunosE Release Notes, Appendix A, System Maximums.

    Published: 2014-08-20