Carbon footprint-based routing of a packet

A computer program product (CPP), the CPP comprising:

• a set of one or more computer-readable storage media;
• and
• program instructions, collectively stored in the set of one or more storage media, for causing a processor set to perform the following computer operations:
• in response to receiving a first packet from a first application, perform a predetermined process for determining a relatively low carbon emission transmission route for the first packet along a source to a target, wherein the predetermined process includes:
• predicting for each of a plurality of devices between the source and the target, carbon emissions that would result from using the device for transmitting the first packet,
• generating a carbon emission map that incorporates the predicted carbon emissions,
• identifying a service level agreement (SLA) that applies to the first packet,
• wherein the SLA defines a plurality of non-functional requirements (NFRs) that apply to transmission of the first packet,
• wherein the NFRs that apply to the transmission of the first packet are decoded from a priority flow control (PFC) and class of service (CoS) values coming from incoming packets including the first packet, and
• selecting, from the carbon emission map, a first transmission route for the first packet, wherein the first transmission route hops along at least one of the devices, wherein the first transmission route is selected over a second transmission route for the first packet based on the second transmission route having a relatively greater carbon emission than the first transmission route and based on the second transmission route not satisfying the SLA that applies to the first packet,
• wherein the SLA has a relatively higher priority than carbon emissions in the selection of the first transmission route for the first packet;
• and
• cause the first packet to be transmitted from the source to the target along the first transmission route.

A computer system (CS), the CS comprising:

• a processor set;
• a set of one or more computer-readable storage media;
• and
• program instructions, collectively stored in the set of one or more storage media, for causing the processor set to perform the following computer operations:
• in response to receiving a first packet from a first application, perform a predetermined process for determining a relatively low carbon emission transmission route for the first packet along a source to a target, wherein the predetermined process includes:
• predicting for each of a plurality of devices between the source and the target, carbon emissions that would result from using the device for transmitting the first packet,
• generating a carbon emission map that incorporates the predicted carbon emissions,
• identifying a service level agreement (SLA) that applies to the first packet,
• wherein the SLA defines a plurality of non-functional requirements (NFRs) that apply to transmission of the first packet,
• wherein the NFRs that apply to the transmission of the first packet are decoded from a priority flow control (PFC) and class of service (CoS) values coming from incoming packets including the first packet, and
• selecting, from the carbon emission map, a first transmission route for the first packet, wherein the first transmission route hops along at least one of the devices, wherein the first transmission route is selected over a second transmission route for the first packet based on the second transmission route having a relatively greater carbon emission than the first transmission route and based on the second transmission route not satisfying the SLA that applies to the first packet,
• wherein the SLA has a relatively higher priority than carbon emissions in the selection of the first transmission route for the first packet;
• and
• cause the first packet to be transmitted from the source to the target along the first transmission route.