Technique for Ensuring Congruency in Link Aggregation

A method of verification and enforcement of congruent services, wherein a congruency digest has been processed from Link Aggregation Group (LAG) link assignments, the LAG link assignments assigning network services to specific LAG links, wherein a service assignment table indicates LAG links of the local LAG node to which a plurality of services that require LAG congruency are assigned, wherein each LAG link is formed between a local LAG node of a local LAG virtual node in a local network and a corresponding remote LAG node of a remote LAG virtual node in a remote network, wherein the method is implemented in the local LAG node and comprises:

• receiving a remote congruency digest from the corresponding remote LAG node;
• detecting whether the link assignments of the received remote congruency digest and of a local congruency digest match;
• and
• moving, if the detecting indicates that the link assignments in the local congruency digest and the remote congruency digest do not match, all services referenced in the digests to a predefined default LAG link.

A local Link Aggregation Group (LAG) node for processing LAG link assignments into digests, the LAG link assignments assigning network services to specific LAG links, wherein each LAG link is formed between the local LAG node of a local LAG virtual node in a local network and a corresponding remote LAG node of a remote LAG virtual node in a remote network, wherein the local LAG node comprises:

• a processor operably connected to memory;
• at least one input/output device;
• wherein the processor is configured to:
• obtain, via the input/output device, a service assignment table that indicates LAG links of the LAG nodes to which a plurality of services that require LAG congruency are assigned;
• and
• prepare, based on the service assignment table, a congruency digest of the local LAG virtual node.

A local Link Aggregation Group (LAG) node for verification and enforcement of congruent services, wherein a congruency digest has been processed from LAG link assignments, the LAG link assignments assigning network services to specific LAG links, wherein a service assignment table indicates LAG links of the local LAG node to which a plurality of services that require LAG congruency are assigned, wherein each LAG link is formed between the local LAG node of a local LAG virtual node in a local network and a corresponding remote LAG node of a remote LAG virtual node in a remote network, wherein the local LAG node comprises:

• a processor operably connected to memory;
• at least one input/output device;
• wherein the processor is configured to:
• receive, via the input/output device, a remote congruency digest from a corresponding remote LAG node;
• detect whether the link assignments of the received remote congruency digest and of the local congruency digest match;
• and
• move, if the detecting indicates that the link assignments in the local congruency digest and the remote congruency digest do not match, all services referenced in the digests to a predefined default LAG link.