Apparatus to achieve quality of service (QOS) without requiring fabric speedup

A method comprising:

• storing, by a device, a count value for each of a plurality of output components;
• adding, by the device, packets received from a network device to one or more input queues included in an input component;
• selectively dequeuing, by the device, a packet from the input component, to be sent to an output component, based on whether the count value for the output component satisfies a threshold,
• the packets including the packet, and
• the plurality of output components including the output component;
• sending, by the device, the packet to the output component when the packet is dequeued from the input component;
• modifying, by the device, the packet after the packet is dequeued from the input component;
• determining, by the device, a change in size of the packet due to modifying the packet;
• updating, by the device, the count value for the output component based on the change in size of the packet due to modifying the packet;
• and
• outputting, by the device, the packet to another network device via the output component.

A non-transitory computer-readable medium for storing instructions, the instructions comprising:

• a plurality of instructions which, when executed by one or more processors, cause the one or more processors to:
• store a count value for each of a plurality of output components;
• add packets received from a network device to one or more input queues included in an input component;
• selectively dequeue a packet from the input component, to be sent to an output component, based on whether the count value for the output component satisfies a threshold,
• the packets including the packet, and
• the plurality of output components including the output component;
• send the packet to the output component when the packet is dequeued from the input component;
• modify the packet after the packet is dequeued from the input component;
• determine a change in size of the packet due to modifying the packet;
• update the count value for the output component based on the change in size of the packet due to modifying the packet;
• and
• output the packet to another network device via the output component.