How are packets processed?
Ingress packets to the ports are queued in a buffer based on priority and scheduled for transmission on the ring. Ring traffic has the highest priority. On egress, the packet header is checked to determine its destination. If the node’s forwarding database indicates the packet is destined for one of its ports, it is queued in the egress buffer and directed to the correct Ethernet port based on priority. If the packet address does not contain a match with one of the node’s ports, it is simply allowed to flow through the transit buffer and back onto the ring. A multicast frame is both copied from the ring into the egress buffer and allowed to flow through the transit buffer.
