Configuring Shared Interfaces on the RSD

To configure shared interfaces on the RSD:

1. Configure the physical interface using the so-fpc/pic/slot, ge-fpc/pic/slot, or xe-fpc/pic/slot statement at the [edit interfaces] hierarchy level.
2. Configure Frame Relay encapsulation or VLAN tagging.
   • For Frame Relay encapsulation, use the encapsulation frame-relay statement at the [edit interfaces so-fpc/pic/slot] hierarchy level.
   • For VLAN tagging, use the vlan-tagging statement at one of the following hierarchy levels: [edit interfaces ge-fpc/pic/slot] or [edit interfaces xe-fpc/pic/slot].
3. Configure logical interfaces under the physical interface using the unit logical-unit-number statement at the [edit interfaces so-fpc/pic/slot] hierarchy level, the [edit interfaces ge-fpc/pic/slot] hierarchy level, or the [edit interfaces xe-fpc/pic/slot] hierarchy level.

   Note: For Ethernet shared interfaces on the JCS 1200 platform, gratuitous-arp configuration statements are supported on the Root System Domain (RSD), but not on the Protected System Domain (PSD). These statements are configured at the [edit interfaces ge-fpc/pic/slot] hierarchy level. These statements include: gratuitous-arp-reply, no-gratuitous-arp-replay, and no-gratuitous-arp-request. Values you configure for gratuitous-arp statements on the RSD are not passed to the PSD.

4. For each logical SONET interface, include the following statements at the [edit interfaces so-fpc/pic/slot.logical-unit-number] hierarchy level:
   • dlci dlci-identifier—Assigns a DLCI for the point-to-point Frame Relay connection between the RSD and the PSD.
   • interface-shared-with psdn—Assigns the logical interface to a PSD.

   For each logical Gigabit Ethernet interface, include the following statements at one of the following hierarchy levels: [edit interfaces ge-fpc/pic/slot.logical-unit-number] or [edit interfaces xe-fpc/pic/slot.logical-unit-number].

   • vlan-id number—Binds an 802.1Q VLAN identifier tag to the logical interface.
   • interface-shared-with psdn—Assigns the logical interface to a PSD.