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(p.s. Blocks and table definition might be changed in the near future)

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Packet IO ingress & egress control block

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Based on NextObjective, 3 tables included in the Next control block:

• VLAN Meta

• Simple

• Hashed

• Multicast (Broadcast)

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VLAN meta table:

• Modify VLAN ID according to NextID

• VLAN ID can be found inside metadata from NextObjective

• Do nothing if table miss

Simple, Hashed, and Multicast table:

Each table matches a unique next id assigned by previous table and execute different kinds of action.※ Only one table hits in this block.

Actions in Next control block

• output

• Sets output port, output port can be any valid port for target device.

• set_vlan_output

• Sets VLAN ID and do output

• l3_routing

• Sets source/destination mac address and do output

• mpls_routing

• Push MPLS label and do L3 routing

• set_mcast_group

• Sets multicast group id

• Action profile group id

• Make the packet processed by specific action profile group

Egress VLAN table:

• This table exists in egress pipeline

• Pop VLAN according to VLAN and egress port

Port Counter control block

Port counter control block includes a list of byte+packet counters, counts for different ingress and egress port

Egress Next control block

Checking fabric metadata “pop_vlan_at_egress”, if the metadata is true, pop the VLAN before sending to the egress port.