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Configuring J Series Services Router Switching Interfaces

The J Series routers with multiport Gigabit Ethernet uPIMs supports Ethernet access switching. This functionality provides the ability to switch traffic at Layer 2 in addition to routing traffic at Layer 3.

J Series routers with multiport Gigabit Ethernet uPIMs can be deployed in branch offices as an access or desktop switch with integrated routing capability. The multiport Gigabit Ethernet uPIM provides Ethernet switching, while the Routing Engine provides routing functionality.

Routed traffic is forwarded from any port of the multiport Gigabit Ethernet uPIM to the WAN interface. Switched traffic is forwarded from one port of the multiport Gigabit Ethernet uPIM to another port on the same the multiport Gigabit Ethernet uPIM. Switched traffic is not forwarded from a port on one multiport Gigabit Ethernet uPIM to a port on a different multiport Gigabit Ethernet uPIM. For more information about configuring the multiport Gigabit Ethernet uPIM switching mode, see the Junos OS Administration Library for Routing Devices.

In access switching mode, only one physical interface is configured for the entire multiport Gigabit Ethernet uPIM. The single physical interface serves as a Virtual Router Interface (VRI). Configuration of the physical port characteristics is done under the single physical interface.

To configure multiport Gigabit Ethernet uPIM Ethernet port properties, include the switch-port statement at the [edit interfaces ge-pim/0/0] hierarchy level:

Access switching mode is supported on the 6-port, 8-port, and 16-port Gigabit Ethernet uPIMs.

The multiport Gigabit Ethernet uPIMs are supported on the J2320, J2350, J4350, and J6350 Services Routers.

The 6-port and 8-port multiport Gigabit Ethernet uPIM occupies a single slot and can be installed in any slot. Because the 16-port Gigabit Ethernet uPIM is two slots high, you cannot install a 16-port uPIM in the top slots (slots 1 and 4). Ports are numbered 0 through 5 on the 6-port Gigabit Ethernet uPIM, 0 through 7 on the 8-port Gigabit Ethernet uPIM, and 0 through 15 on the 16-port Gigabit Ethernet uPIM.

Example: Configuring J Series Services Router Switching Interfaces

Configure a single physical interface for the uPIM and set the port parameters for port 0 and port 1: