Negotiable Layer 2 Failover
Publication Date: 2014-May-05
The IP.com Prior Art Database
Negotiable Layer 2 Failover uses the Negotiate Packets to build the Layer 2 Failover Monitor-Controller entities on the access L2 network. It doesn’t need users to manually configure L2F Monitor-Controller ports on all switches of the access network. It only needs users to configure L2F Monitor-Controller on the Edge Nodes, and all other L2F configurations on the inner nodes can be automatically generated by the Negotiate Packets.
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This disclosure presents an invention to data center systems using redundant or passive-standby devices to provide an easy deployed reliable network. More particularly, this invention relates to negotiation of failover in a Layer 2 network.
Layer 2 Failover provides a protection for Layer 2 redundancy network using server NIC adapter teaming when the uplink fails. When the server network adapters are configured in a primary or secondary relationship known as teaming, if the link is lost on the primary interface, connectivity is transparently switched to the secondary interface. When you enable Layer 2 Failover on the switch, the link state of the internal downstream ports are bound to the link state of one or more of the external upstream ports. When you associate a set of downstream ports to a set of upstream ports, if the upstream ports become unavailable, Layer 2 Failover automatically disable all of the associated downstream ports. This causes the server primary interface to failover to the secondary interface.
With the expansion of data center, there are usually more than one switch nodes deployed between server and external network, in order to enable a Layer 2 Failover link, all the switches in the downstream should be manually configured one by one, so as to ensure integrity and consistency of the configuration artificially. It can be seen that the configuration workload is excessive. Additionally, the speed of manual configuration process is limited, while no fully usable status of services can be implemented before the configuration of all the switches in the network is completed. Further more, an artificial configuration error may occur (e.g. bound downstreamand upstream ports in different VLANs) and Layer 2 Failover may be failed cause of the configuration process.
There is a need to simplify the Layer 2 Failover deployment to make a high efficient and guaranteed configuration.
This article presents the Negotiable Layer 2 Failover (NL2F) to help users to solve the problem described insection one. NL2F is a smart way to auto configure L2 Failover, user needn't to configure L2 Failover for all switches and guarantee the correct configurations.
NL2F uses a set of packets communication on the path from the terminal server hosts to the network gateway edge node to build a L2F network. And it's also responsible for the maintaining of the L2F network. The configurations generated by the NL2F are the same as the traditional L2F. The NL2F can be based on port or VLAN+port, the type depends on monitor and control ports' attribute. Also this function can be controlled to enable/disable by user.
Negotiable Layer 2 Failover uses the Negotiate Packets to build the Layer 2 Failover Monitor-Controller entities on the access L2 network. It doesn't need users to manually configure L2F Monitor-Controller ports on all switches of the access network. It only needs users to configure