Peer-to-peer link aggregation across a service provider network
View Patent ↗A virtual link aggregation-capable service provider network and network edge device are described. In at least one embodiment, the service provider edge devices forward packets across the service provider network between pairs of customer ports, including link aggregation packets that would ordinarily be consumed by the edge device. This allows the customer to bridge a link aggregation across a service provider network. Other embodiments are also described and claimed.
1. A method of providing virtual link aggregation in a network, comprising:
aggregating first and second sets of multiple physical links, wherein each physical link of the first set of multiple physical links connects at a first end to a first customer packet device, wherein each physical link of the second set of multiple physical links connects at a first end to a second customer packet device, and wherein the second end of each physical link of the first and second sets of multiple physical links connects to a network that is intermediate to the two customer packet devices;
the network maintaining a pairing between each physical link in the first set of multiple physical links and a corresponding physical link in the second set of multiple physical links;
the network using the pairing to forward a link aggregation packet between the first and second customer packet devices such that the link aggregation packet arriving at the network on one of the physical links in the first set of multiple physical links is directed to exit the network at the corresponding paired physical link in the second set of multiple physical links; wherein
a different VMAN tag value is assigned to each of the physical link pairs maintained by the network between the first set of multiple physical links and the second set of multiple physical links;
a first network element, connected to one of the pairs of physical links in the first set of multiple physical links on which the link aggregation packet was received, replacing a packet destination address with a second destination address that allows the link aggregation packet to pass through the network, and inserting a VMAN tag in the link aggregation packet, wherein the VMAN tag comprises the particular VMAN tag value assigned to the physical link on which the link aggregation packet was received by the network element;
the first network element forwarding the link aggregation packet toward a second network element connected to one of the physical links in the second set of multiple physical links paired with the physical link in the first set of multiple physical links on which the link aggregation packet was received; and
the second network element, connected to the one of the physical links in the second set of multiple physical links that is paired with the first set of multiple physical links, replacing the second destination address with a link aggregation destination address, removing the VMAN tag from the link aggregation packet, and forwarding the link aggregation packet on the physical link in the second set of multiple physical links that is paired with the physical link in the first set of multiple physical link on which the aggregation packet was received.
2. The method of claim 1 , wherein the network using the pairing to forward data packets between the first and second customer packet devices comprises:
a first network element, connected to the physical link on which a data packet was received, inserting a VMAN in the data packet, wherein the VMAN tag comprises a particular tag value associated with the physical link on which the data packet was received by the network element;
the first network element forwarding the data packet toward a network element connected to the other physical link paired with the physical link on which the data packet was received; and
the network element connected to the other physical link of the pairing removing the VMAN tag from the data packet and forwarding the data packet on the other physical link of the pairing.
3. The method of claim 2 , wherein the first network element is also the network element connected to the other physical link of the pairing.
4. The method of claim 2 , wherein each of the first set of multiple physical links connect to the first network element, and each of the second set of multiple physical links connect to the network element connected to the other physical link of the pairing.
5. The method of claim 4 , wherein the first network element is also the network element connected to the other physical link of the pairing.
6. The method of claim 2 , wherein the second set of multiple physical links connects to a group of at least two network elements, with at least one link of the second set of multiple physical links connected to each network element in the group.
7. The method of claim 2 , wherein the network using the pairing to forward data packets between the first and second packet devices further comprises an intermediate network device receiving the data packet from the first network element and forwarding the data packet toward the network element connected to the paired physical link, based on the VMAN tag value inserted by the first network element.
8. The method of claim 2 , wherein the VMAN tag value is part of the pairing maintained by the network.
9. The method of claim 1 , wherein the second destination address comprises an Organizationally Unique Identifier recognized by the network element connected to the other physical link of the pairing.