Systems and methods for providing I-SID translation in SPB networks
Systems, methods, and apparatuses are disclosed herein for providing an Individual Service Instance identifier (“I-SID”) translation service for accessing services on different networks. Packets designated for specific services via an I-SID Tag may be received at an edge network device and a lookup may be performed to locate the service on another network via the I-SID corresponding to the service, the I-SID being mapped at another network. The I-SID may be updated with the newly-located I-SID in order for the packet to reach an appropriate service on the other network.
1. A method for providing Individual Service Instance Identifier (“I-SID”) translation for services residing on a second network being accessed from a first network, the method comprising:
receiving, at a first edge network device of the first network, a packet that is directed to a first service instance of a service, wherein the first service instance is mapped to a first I-SID;
determining, at the first edge network device, that the packet is addressed to a second edge network device of the second network;
in response to determining that the packet is addressed to the second edge network device of the second network, determining, at the first edge network device and based on the first I-SID, a second I-SID that is different from the first I-SID and is mapped to a second service instance of the service, wherein the second service instance of the service resides on the second network, and wherein the determining the second I-SID comprises:
accessing a table that stores mappings between I-SID values on the first network, and corresponding I-SID values on the second network; and
retrieving, from the table, based on the first I-SID, a value for the second I-SID;
in response to determining the second I-SID, updating a header of the packet to replace the first I-SID with the second I-SID; and
transmitting the packet to the second network.
2. The method of claim 1 , wherein transmitting the packet to the second network further comprises:
determining whether the second I-SID is mapped to a Media Access Control (“MAC”) address of the second edge network device of the second network; and
in response to determining that the second I-SID is mapped to the MAC address of the second edge network device of the second network, updating the header of the packet to replace a Backbone Destination Address (“B-DA”) with the MAC address of the second edge network device.
3. The method of claim 1 , wherein the table is stored on the second edge network device.
4. The method of claim 1 , wherein the table is stored on a device different from both the first edge network device and the second edge network device.
5. The method of claim 1 , further comprising:
detecting, using a pre-defined protocol on both the first network and the second network, the first service instance of the service and the second service instance of the service;
identifying, on the first network, the first I-SID that is mapped to the first service instance of the service, and, on the second network, the second I-SID that is mapped to the second service instance of the service; and
storing, in the table, the mapping between the first I-SID and the second I-SID.
6. The method of claim 5 , wherein the table is stored on at least one of the first edge network device and the second edge network device.
7. The method of claim 5 , further comprising:
detecting, using the predefined protocol on the first network, a first Media Access Control (“MAC”) address for addressing packets directed to the first I-SID, and, on the second network, a second MAC address for addressing packets directed to the second I-SID; and
storing in the table the first MAC address corresponding to the first I-SID and the second MAC address corresponding to the second I-SID.
8. A system for providing Individual Service Instance Identifier (“I-SID”) translation for services residing on a second network being accessed from a first network, the system comprising:
communications circuitry; and
control circuitry configured to:
receive, at a first edge network device of the first network, a packet that is directed to a first service instance of a service, wherein the first service instance is mapped to a first I-SID;
determine, at the first edge network device, that the packet is addressed to a second edge network device of the second network;
in response to determining that the packet is addressed to the second edge network device of the second network, determine, at the first edge network device and based on the first I-SID, a second I-SID that is different from the first I-SID and is mapped to a second service instance of the service, wherein the second service instance of the service resides on the second network, and wherein to determine the second I-SID the control circuitry is configured to:
access a table that stores mappings between I-SID values on the first network and corresponding I-SID values on the second network; and
retrieve, from the table, based on the first I-SID, a value for the second I-SID;
in response to determining the second I-SID, update a header of the packet to replace the first I-SID with the second I-SID; and
transmit the packet to the second network.
9. The system of claim 8 , wherein the control circuitry is further configured, when transmitting the packet to the second network, to:
determine whether the second I-SID is mapped to a Media Access Control (“MAC”) address of the second edge network device of the second network; and
in response to determining that the second I-SID is mapped to the MAC address of the second edge network device of the second network, update the header of the packet to replace a Backbone Destination Address (“B-DA”) with the MAC address of the second edge network device.
10. The system of claim 8 , wherein the table is stored on the second edge network device.
11. The system of claim 8 , wherein the table is stored on a device different from both the first edge network device and the second edge network device.
12. The system of claim 8 , wherein the control circuitry is further configured to:
detect, using a pre-defined protocol on both the first network and the second network, the first service instance of the service and the second service instance of the service;
identify, on the first network, the first I-SID that is mapped to the first service instance of the service, and, on the second network, the second I-SID that is mapped to the second service instance of the service; and
store, in the table, the mapping between the first I-SID and the second I-SID.
13. The system of claim 12 , wherein the table is stored on at least one of the first edge network device and the second edge network device.
14. The system of claim 12 , wherein the control circuitry is further configured to:
detect, using the predefined protocol on the first network, a first Media Access Control (“MAC”) address for addressing packets directed to the first I-SID, and, on the second network, a second MAC address for addressing packets directed to the second I-SID; and
store in the table the first MAC address corresponding to the first I-SID and the second MAC address corresponding to the second I-SID.
15. A non-transitory computer-readable medium having instructions encoded thereon for providing Individual Service Instance Identifier (“I-SID”) translation for services residing on a second network being accessed from a first network, the instructions when executed by one or more processors causing the one or more processors to perform operations, the operations comprising:
receiving, at a first edge network device of the first network, a packet that is directed to a first service instance of a service, wherein the first service instance is mapped to a first I-SID;
determining, at the first edge network device, that the packet is addressed to a second edge network device of the second network;
in response to determining that the packet is addressed to the second edge network device of the second network, determining, at the first edge network device and using the first I-SID, a second I-SID that is different from the first I-SID and is mapped to a second service instance of the service, wherein the second service instance of the service resides on the second network, and wherein the determining the second I-SID comprises:
accessing a table that stores mappings between I-SID values on the first network and corresponding I-SID values on the second network; and
retrieving, from the table, based on the first I-SID, a value for the second I-SID;
in response to determining the second I-SID, updating a header of the packet to replace the first I-SID with the second I-SID;
in response to determining that the second I-SID is mapped to a Media Access Control (“MAC”) address of the second edge network device of the second network, updating the header of the packet to replace a Backbone Destination Address (“B-DA”) with the MAC address of the second edge network device; and
transmitting the packet to the second network.
16. The non-transitory computer-readable medium of claim 15 , wherein the transmitting the packet to the second network comprises:
determining whether the second I-SID is mapped to the MAC address of the second edge network device of the second network.
17. The non-transitory computer-readable medium of claim 15 , wherein the table is stored on the second edge network device.
18. The non-transitory computer-readable medium of claim 15 , wherein the table is stored on a device different from both the first edge network device and the second edge network device.
19. The non-transitory computer-readable medium of claim 15 , wherein the operations further comprise:
detecting, using a pre-defined protocol on both the first network and the second network, the first service instance of the service and the second service instance of the service;
identifying, on the first network, the first I-SID that is mapped to the first service instance of the service, and, on the second network, the second I-SID that is mapped to the second service instance of the service; and
storing, in the table, the mapping between the first I-SID and the second I-SID.
20. The non-transitory computer-readable medium of claim 19 , wherein the operations further comprise:
detecting, using the predefined protocol on the first network, a first MAC address for addressing packets directed to the first I-SID, and, on the second network, the MAC address for addressing packets directed to the second I-SID; and
storing in the table the first MAC address corresponding to the first I-SID and the MAC address corresponding to the second I-SID.