MPLA thus supports multipath trunking between multiple switches and servers, giving network administrators flexibility in configuring their hardware for optimal traffic servicing. However, you can use the Multipoint Link Aggregation (MPLA) technology developed by 3Com to aggregate physical links connected to different switches into a single logical link. Trunking by itself is limited to point-to-point connections between two switches or between a switch and a server. The server can transmit data at 400 Mbps but can receive data at only 100 Mbps. Asymmetrical trunking: Allows any port in a trunking group to transmit packets but allows only one port (the port on the switch) to receive packets.For example, a server can both transmit and receive data at 400 Mbps in a trunked group of four interfaces and one switch. Full-duplex connections are thus supported over all links in the group. Symmetrical trunking: Allows any port in a trunking group to transmit packets to any other port.This provides increased bandwidth between the server and the switch and ensures fault-tolerant operation.
INTERNET TRUNK SOFTWARE
For example, trunking software installed on multiple network interface cards (NICs) in the server automatically handles load balancing across the various server interfaces and can remove an interface from the trunking group if the interface goes down. This form of trunking can be purely software based or can be implemented as a combination of both hardware and software. You can also implement trunking in switch-to-server connections so that multiple connections to a single server can be aggregated. In a full-duplex configuration, this means rates of 600 or 800 Mbps, which rivals the more expensive Gigabit Ethernet technology and gives new life to old switches. By aggregating several 100-Mbps links between Fast Ethernet switches, you can achieve data rates of 300 or 400 Mbps between the switches to accommodate network backbone traffic.
In the switched local area network ( LAN) environment, trunking was originally used to reduce congestion in switch-to-switch connections. Trunking is essentially a form of inverse multiplexing and is often used to aggregate multiple wide area network (WAN) connections into a single connection.
Trunking provides a way of overcoming the bandwidth limitations of a single physical link and is used in both switch-to-switch and switch-to-server connections to relieve traffic congestion.Ī number of vendors have implemented trunking hardware and/or software, and a standard called IEEE 802.3ad that ensures interoperability among the different vendor offerings should be approved soon.
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