Related Documentation
Configuring 100-Gigabit Ethernet MIC (MIC3-3D-1X100GE-CFP) to Interoperate with 100-Gigabit Ethernet PICs (Type 4 1X100GE PIC for STFPC4 FPC) Using SA Multicast Mode
To configure a 100-Gigabit Ethernet MIC (MIC3-3D-1X100GE-CFP) to interoperate with other Juniper Networks 100-Gigabit Ethernet PICs (Type 4 1X100GE PIC for STFPC4 FPC), you can use the forwarding-mode statement with the sa-multicast option at the [edit chassis fpc slot pic slot] hierarchy level.
SA multicast mode uses the multicast bit in the source MAC address for packet steering. By default, the SA multicast bit is set to 0 for all packets sent by the 100-Gigabit Ethernet MIC. The egress packet flow is the traffic flowing from the 100-Gigabit Ethernet MIC to the 100-Gigabit Ethernet PIC. Since no VLAN tags are available, the SA multicast bit is sent on the outgoing packets. At the other end, the 100-Gigabit Ethernet PIC looks at the bit and forwards the packets to either Packet Forwarding Engine 0 or 1. The ingress packet flow is the traffic flowing from a 100-Gigabit Ethernet PIC to a 100-Gigabit Ethernet MIC. When the 100-Gigabit Ethernet PIC is sending out a packet, the multicast bit is set based on the Packet Forwarding Engine packet received. The multicast bit is then transmitted and the MPC3E sees the multicast bit on ingress.
 | Note: The SA multicast bit is ignored by MPC3E while learning the source MAC addresses. |
Configuring 100-Gigabit Ethernet MICs
The interoperability mode between the 100-Gigabit Ethernet MIC and the 100-Gigabit Ethernet PIC is configured on a PIC basis. The MPC3E has two MIC slots and each 1X100GE MIC creates a single PIC. A 100-Gigabit Ethernet MIC plugged in to slot 0 corresponds to PIC 0 and the MIC plugged in to slot 1 corresponds to PIC 2.
| Note: The configuration is valid only on PIC 0 and PIC 2. |
To configure SA multicast mode on a Juniper Networks 100-Gigabit Ethernet MIC in MPC 0, PIC 0 for interconnection with another Juniper Networks 100-Gigabit Ethernet PIC, use the set chassis fpc slot pic slot forwarding-mode sa-multicast command, as follows:
You can use the show forwarding-mode command to view the resulting configuration, as follows:
Configuring 100-Gigabit Ethernet PIC
The default packet steering mode for the 100-Gigabit Ethernet PIC is SA multicast bit mode. There is no SA multicast configuration required on the 100-Gigabit Ethernet PIC to enable this mode.
| Note: SA multicast mode can be configured, but it is not necessary. |
The 100-Gigabit Ethernet PIC uses a Type 4 FPC and two 50 Gpbs Packet Forwarding Engines to achieve 100 Gbps throughput. The 50 Gpbs physical interfaces are created when the 100-Gigabit Ethernet PIC is plugged in. The two physical interfaces are visible and configuration is allowed on both physical interfaces. The physical interfaces on the 100-Gigabit Ethernet PIC should be configured in static LAG mode without enabling Link Aggregation Control Protocol (LACP). This ensures that a single 100-Gigabit aggregated interface is visible on the link connecting to the 100-Gigabit Ethernet MIC instead of two independent 50 Gpbs interfaces.
When the PIC is in aggregated Ethernet mode, the two physical interfaces on the same PIC are aggregated into one AE physical interface. When the PIC is configured with two physical interfaces, it creates the physical interfaces et-x/y/0:0 and et-x/y/0:1 where x is the FPC slot number and y is the PIC slot number. The example shows how to configure two physical interfaces for PIC 0 in FPC 5:
