cisco nexus fex windows server 2016 lacp

Cisco Nexus Fex Windows Server 2016 Lacp Manual Configuration And

The behavior of the single logical bonded interface depends upon its specified bonding driver mode.

A link aggregation group (LAG) is the collection of physical ports combined together.

These umbrella terms encompass not only vendor-independent standards such as Link Aggregation Control Protocol (LACP) for Ethernet defined in IEEE 802.1AX or the previous IEEE 802.3ad, but also various proprietary solutions.

Ethernet bandwidths historically have increased tenfold each generation: 10 megabit s, 100 Mbits, 1000 Mbits, 10,000 Mbits.

If one started to bump into bandwidth ceilings, then the only option was to move to the next generation which could be cost prohibitive.

An alternative solution, introduced by many of the network manufacturers in the early 1990s, is to use link aggregation to combine two physical Ethernet links into one logical link.

Cisco Nexus Fex Windows Server 2016 Lacp Manual Configuration And

Most of these early solutions required manual configuration and identical equipment on both sides of the connection.

In either the usual computer-to-switch or in a switch-to-switch configuration, the cable itself or either of the ports the cable is plugged into can fail.

Examples of aggregation at layer 1 ( physical layer ) include power line (e.g.

IEEE 1901 ) and wireless (e.g.

IEEE 802.11) network devices that combine multiple frequency bands.

OSI layer 2 ( data link layer, e.g.

Ethernet frame in LANs or multi-link PPP in WANs, Ethernet MAC address ) aggregation typically occurs across switch ports, which can be either physical ports or virtual ones managed by an operating system.

However, in order to avoid out-of-order delivery, not all implementations take advantage of this.

The former requires that both ends of a link use the same aggregation method, but has performance advantages over the latter.

Each manufacturer developed its own method, which led to compatibility problems.

The IEEE 802.3 working group took up a study group to create an interoperable link layer standard (i.e.

November 1997 meeting.

The group quickly agreed to include an automatic configuration feature which would add in redundancy as well.

This became known as Link Aggregation Control Protocol (LACP).

LACP allows a network device to negotiate an automatic bundling of links by sending LACP packets to their peer, a directly-connected device that also implements LACP.

With Static link aggregation, a cabling or configuration mistake could go undetected and cause undesirable network behavior.

If it finds a device on the other end of the link that also has LACP enabled, it will also independently send frames along the same links enabling the two units to detect multiple links between themselves and then combine them into a single logical link.

LACP can be configured in one of two modes: active or passive.

In active mode it will always send LACPDUs along the configured links.

In passive mode, however, it only reacts as speak when spoken to, and therefore can be used as a way of controlling accidental loops (as long as the other device is in active mode).

The majority of modern Linux distributions come with a Linux kernel which has the Linux bonding driver integrated as a loadable kernel module and the ifenslave (if network interface) user-level control program pre-installed.

It came into use with the Beowulf cluster patches for the Linux kernel 2.0.