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Introduction 29
But if an ISP link has a relatively low monthly charge with high per- megabyte data usage charges, then it
should only be used in failover mode as a backup to a main ISP link.
5. It may be requirement to share ISP bandwidth between Guest HSIA and Hotel Admin networks, or have
each network available as a fall-back network for the other. Both scenarios can be handled with the
Nomadix NSE.
6. It may be desirable to have certain users connected to a particular ISP link, and other users connected to a
different ISP link. The Nomadix NSE provides a “preferred WAN” radius attribute (VSA). For example,
paying users may be connected to an expensive high-quality link, with free users connected to a lower-
quality link, with link failover still available if the preferred link fails.
Some examples of typical common deployment scenarios are outlined below: These are just examples and
other deployment scenarios can be handled, as well.
Load Balancing across Multiple Low Speed Links
In this example, an establishment has access to only low-speed, DSL-based ISP circuits and wishes to
aggregate five such links together. The Nomadix NSE is configured with load balancing between all links.
Failover to Standby ISP Link
In this example, the organization has a high-quality 100M Ethernet service. But to guarantee continuous HSIA
service, the organization has a back-up ISP service from a low-cost wireless provider, which charges on a data
volume basis. The organization only wishes for this link to be used when the main ISP circuit is not available.