System and method for determining the configuration of switches in virtual link trunking environments

1. A network switching unit comprising:

one or more hardware processors;

wherein the one or more hardware processors are configured to execute code to cause the network switching unit to perform operations comprising:

receiving a first configuration message on a first network link coupling the network switching unit to another network switching unit;

identifying a first domain ID assigned to the another network switching unit based on the first configuration message;

determining whether the first domain ID matches a second domain ID assigned to the network switching unit;

in response to determining that the first domain ID matches the second domain ID adding the first network link to a first link aggregation group (LAG) associated with the first domain ID and designating the first LAG as part of an intra cluster link (ICL);

in response to determining that the first domain ID does not match the second domain ID, adding the first network link to a second LAG associated with the first domain ID; and

forwarding network traffic using the first LAG and the second LAG and

the second LAG to improve the forwarding by the network switching unit and redundancy of a network.

2. The network switching unit of claim 1 , wherein the operations further comprise: formatting a second configuration message including the second domain ID; and broadcasting the second configuration message on each of one or more second network links, the one or more second network links including the first network link.

3. The network switching unit of claim 1 , wherein the operations further comprise ignoring the first configuration message when the first configuration message does not include the first domain ID.

4. The network switching unit of claim 1 , wherein the operations further comprise ignoring the first configuration message when the first domain ID is zero.

5. The network switching unit of claim 1 , wherein the operations further comprise configuring the network switching unit using at least the first LAG, the second LAG, and the ICL.

6. The network switching unit of claim 1 , wherein the operations further comprise:

determining whether the first LAG exists; and

in response to determining that the first LAG does not exist, creating the first LAG before adding the first network link to the first LAG.

7. The network switching unit of claim 1 , wherein the operations further comprise:

determining whether the second LAG exists; and

in response to determining that the second LAG does not exist, creating the second LAG before adding the first network link to the second LAG.

8. A method comprising:

receiving, by a first network switching device having one or more hardware processors, a first configuration message on a first network link coupling the first network switching device to a second network switching device;

identifying, by the one or more hardware processors, a first domain ID assigned to the second network switching device based on the first configuration message;

determining, by the one or more hardware processors, whether the first domain ID matches a second domain ID assigned to the first network switching device;

in response to determining that the first domain ID matches the second domain ID adding, by the one or more hardware processors, the first network link to a first link aggregation group (LAG) associated with the first domain ID and designating, by the one or more hardware processors, the first LAG as part of an intra cluster link (ICL);

in response to determining that the first domain ID does not match the second domain ID, adding, by the one or more hardware processors, the first network link to a second LAG associated with the first domain ID; and

forwarding, by the first network switching device, network traffic using the first LAG and the second LAG to improve the forwarding by the first network switching device and redundancy of a network.

9. The method of claim 8 , further comprising:

formatting, by the one or more hardware processors, a second configuration message including the second domain ID assigned to the first network switching device; and

broadcasting, by the first network switching device, the second configuration message on each of one or more second network links, the one or more second network links including the first network link.

10. The method of claim 8 , further comprising ignoring, by the first network switching device, the first configuration message when the first configuration message does not include the first domain ID.

11. The method of claim 8 , further comprising ignoring, by the first network switching device, the first configuration message when the first domain ID is zero.

12. The method of claim 8 , further comprising configuring the first network switching device using at least the first LAG, the second LAG, and the ICL.

13. The method of claim 8 , further comprising:

determining, by the one or more hardware processors, whether the first LAG exists; and

in response to determining that the first LAG does not exist, creating, by the one or more hardware processors, the first LAG before adding the first network link to the first LAG.

14. The method of claim 8 , further comprising:

determining, by the one or more hardware processors, whether the second LAG exists; and

in response to determining that the second LAG does not exist, creating, by the one or more hardware processors, the second LAG before adding the first network link to the second LAG and the second LAG to improve the forwarding by the network switching unit and redundancy of a network.

15. An information handling system comprising:

a domain associated with a first domain ID;

the domain comprising a first switch having one or more hardware processors;

wherein the first switch is configured to:

receive a first configuration message on a first network link coupling the first switch to a second switch;

identify a second domain ID assigned to the second switch based on the first configuration message;

determine whether the first domain ID matches the second domain ID;

in response to determining that the first domain ID matches the second domain ID add the first network link to a first link aggregation group (LAG) associated with the first domain ID and designate the first LAG as part of an intra cluster link (ICL);

in response to determining that the first domain ID does not match the second domain ID, add the first network link to a second LAG associated with the first domain ID; and

forward network traffic to the second switch using the first LAG or the second LAG to improve the forwarding by the first switch and redundancy of a network.

16. The information handling system of claim 15 , wherein the first switch is further configured to:

format a second configuration message including the first domain ID; and

broadcast the second configuration message on each of one or more second network links, the one or more second network links including the first network link.

17. The information handling system of claim 15 , wherein the first switch is further configured to ignore the first configuration message when the first configuration message does not include the second domain ID or the second domain ID is zero.

18. The information handling system of claim 15 , wherein the first switch is further configured to configure the first switch using at least the first LAG, the second LAG, and the ICL.

19. The information handling system of claim 15 , wherein the first switch is further configured to:

determine whether the first LAG exists; and

in response to determining that the first LAG does not exist, create the first LAG before adding the first network link to the first LAG.

20. The information handling system of claim 15 , wherein the first switch is further configured to:

determine whether the second LAG exists; and

in response to determining that the second LAG does not exist, create the second LAG before adding the first network link to the second LAG.