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What is the Centillion 1200N Switch?LAN Emulation
The server card provides the three server functions below to realize LAN emulation.
■LES (LAN Emulation Server)
LES provides the ARP (Address Resolution Protocol) function for solving an ATM address from a MAC address. There is one LES for each ELAN (Emulated LAN).
■LECS (LAN Emulation Configuration Server)
LECS manages LAN emulation configuration and provides LES addresses. It assigns a LEC (LAN Emulation Client; client that is a member of LAN emulation) to a certain ELAN. There is one LECS for each management domain.
■BUS (Broadcast and Unknown Server)
BUS provides broadcast and multicast functions and solves unknown destination addresses. There is one BUS for each ELAN (Emulated LAN).
Figure 2-8 is a sample system configuration using the ATM Switch series switching system and the server card (LAN Emulation Server).
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Figure 2-8: Sample System Configuration
In the sample system configuration (Figure
The server card is installed on one of the ATM switches in the illustration. A number of server cards can be installed on a single ATM Switch.
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