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ERX-7xx Models, ERX-14xx Models, and the ERX-310 Router

To create IP tunnels on an ERX-7xx model, ERX-14xx model, or an ERX-310 router, you must install a Service line module (SM) or a module that supports the use of shared tunnel-server ports. For information about installing modules in the ERX routers, see the ERX Hardware Guide.

SMs provide dedicated tunnel-server ports that are always configured on the module. Unlike other line modules, SMs do not pair with corresponding I/O modules that contain ingress and egress ports. Instead, they receive data from and transmit data to other line modules with access to ingress and egress ports on their own associated I/O modules. However, you must assign interfaces on other line modules or loopback interfaces to act as source endpoints for the tunnel.

You can also create IP tunnels on router modules that support shared tunnel-server ports. You can configure (provision) a shared tunnel-server port to use a portion of the module's bandwidth to provide tunnel services. For a list of the modules that support shared tunnel-server ports, see the ERX Module Guide.

For information about configuring tunnel services on dedicated and shared tunnel-server ports, see Managing Tunnel Service and IPSec Service Interfaces in JUNOSe Physical Layer Configuration Guide.

All line modules forward traffic to IP tunnels. For information about which line modules accept traffic for IP tunnels, see the ERX Module Guide.

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