Supporting multiple multicast trees in trill networks
First Claim
1. A switch, comprising:
- determining circuitry configured to;
determine an internal multicast group identifier comprising a first and a second sets of bits, wherein the first set of bits is based on a source address and a multicast address associated with a multicast packet, wherein the second set of bits is based on;
a multicast tree identifier in response to associated with the multicast packet being associated with the multicast tree identifier; and
a hash-based technique in response to the multicast packet not being associated with a multicast tree identifier; and
wherein scope of the internal multicast group identifier is internal and local within the switch; and
forwarding circuitry configured to determine one or more output ports for the multicast packet by performing a lookup using the internal multicast group identifier.
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Abstract
Systems and techniques for supporting multiple multicast trees are described. Some embodiments provide a system that determines an internal multicast group identifier based on a source address, a multicast address, and a multicast tree identifier field associated with a multicast packet. The system can then forward the multicast packet based on the internal multicast group identifier. Specifically, the system can determine a first set of bits based on the source address and the multicast address of the multicast packet. The system can determine a second set of bits based on the multicast tree identifier field of the multicast packet. Next, the system can combine the first set of bits and the second set of bits to obtain the internal multicast group identifier. In some embodiments, the scope of an internal virtual network identifier does not extend beyond a switch or a forwarding module within a switch.
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Citations
21 Claims
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1. A switch, comprising:
determining circuitry configured to; determine an internal multicast group identifier comprising a first and a second sets of bits, wherein the first set of bits is based on a source address and a multicast address associated with a multicast packet, wherein the second set of bits is based on; a multicast tree identifier in response to associated with the multicast packet being associated with the multicast tree identifier; and a hash-based technique in response to the multicast packet not being associated with a multicast tree identifier; and wherein scope of the internal multicast group identifier is internal and local within the switch; and forwarding circuitry configured to determine one or more output ports for the multicast packet by performing a lookup using the internal multicast group identifier. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computing system, comprising:
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a processor; and a memory storing instructions that when executed by the processor cause the system to perform a method, the method comprising; determining an internal multicast group identifier comprising a first and a second sets of bits, wherein the first set of bits is based on a source address and a multicast address associated with a multicast packet, wherein the second set of bits is based on; a multicast tree identifier in response to associated with the multicast packet, being associated with the multicast tree identifier; and a hash-based technique in response to the multicast packet not being associated with a multicast tree identifier; and wherein scope of the internal multicast group identifier is internal and local within the system; and determining one or more output ports for the multicast packet by performing a lookup using the internal multicast group identifier. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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determining an internal multicast group identifier comprising a first and a second sets of bits, wherein the first set of bits is based on a source address and a multicast address associated with a multicast packet, wherein the second set of bits is based on; a multicast tree identifier in response to associated with the multicast packet, being associated with the multicast tree identifier; and a hash-based technique in response to the multicast packet not being associated with a multicast tree identifier; and wherein scope of the internal multicast group identifier is internal and local within a switch; and determining one or more output ports for the multicast packet by performing a lookup using the internal multicast group identifier. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification