# 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 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 session limit is spread in any combination across a maximum of 8000 tunnels. For a router that is operating as an LAC for some tunnels and as an LNS for others, the 8000 tunnels and the router’s applicable maximum sessions limits apply to the combined total of LAC and LNS tunnels and sessions.

- 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 is operating as an LAC for some tunnels and as an LNS for others, the 8000 tunnels and 16,000 sessions limits apply to the combined total of LAC and LNS tunnels and 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.