Two-stage port-channel resolution in a multistage fabric switch
In some embodiments, a data packet may be received at a leaf switch. A port-channel associated with a destination port for the data packet may be identified, and the data packet may be transmitted to the destination port via the identified port-channel.
1. A method comprising:
receiving a data packet for transmission at a leaf switch;
identifying a port-channel associated with a destination port for the data packet;
determining that the destination port associated with the identified port-channel does not comprise a local physical port;
in response to determining that the destination port associated with the identified port-channel does not comprise the local physical port, mapping a local index to a global index associated with the identified port-channel;
setting a header value in the data packet to the global index; and
transmitting the data packet to the destination port via the identified port-channel.
2. The method of claim 1 , wherein identifying the port-channel comprises generating a flow hash value as an input for a port-channel member selection table.
3. The method of claim 2 , further comprising identifying a destination index associated with the identified port-channel according to the generated flow hash value.
4. The method of claim 3 , further comprising determining whether the leaf switch comprises a local port associated with the identified port-channel.
5. The method of claim 4 , wherein the identified destination index comprises the local index in response to determining that the leaf switch comprises the local port associated with the identified port-channel.
6. The method of claim 4 , wherein the identified destination index comprises the global index in response to determining that the leaf switch does not comprise the local port associated with the identified port-channel.
7. The method of claim 1 , further comprising
transmitting the data packet to a fabric switch.
8. An apparatus comprising:
a memory storage; and
a processor coupled to the memory storage, the processor operative to:
receiving a data packet for transmission at a leaf switch;
identifying a port-channel associated with a destination port for the data packet;
determining that the destination port associated with the identified port-channel does not comprise a local physical port;
in response to determining that the destination port associated with the identified port-channel does not comprise the local physical port, mapping a local index to a global index associated with the identified port-channel;
setting a header value in the data packet to the global index; and
transmitting the data packet to the destination port via the identified port-channel.
9. The method of claim 8 , further comprising transmitting the data packet to a fabric switch.
10. The method of claim 8 , wherein identifying the port-channel comprises generating a flow hash value as an input for a port-channel member selection table.
11. The method of claim 10 , further comprising identifying a destination index associated with the identified port-channel according to the generated flow hash value.
12. The method of claim 11 , further comprising determining whether the leaf switch comprises a local port associated with the identified port-channel.
13. The method of claim 12 , wherein the identified destination index comprises the local index in response to determining that the leaf switch comprises the local port associated with the identified port-channel.
14. The method of claim 12 , wherein the identified destination index comprises the global index in response to determining that the leaf switch does not comprise the local port associated with the identified port-channel.