Enterasys Networks X-PeditionTM manual Dialer Interface, Dialer Strings, Dialer Pool

Implementing Dial Services

to support point-to-point or point-to-multi-point connections and can be non-spoofed for backup purposes. Refer to “Dialer Interface Spoofing” on page 10-18for more information.

•Dialer map class defines all line characteristics of calls to the destination including the interval to wait for a dial signal. It is specified with the map class dialer command.

•IP address identifies the local side of the connection. It is configured with the ip address command.

•Dialer strings are phone numbers used to reach a destination. They are set with the dialer string command.

•Dialer pool is a virtual group of physical interfaces used to reach a destination. Interfaces in a dialer pool are weighted by priority. It is configured with the dialer pool command.

Dialer Interface

A dialer interface, which is a group of settings used by the XSR to connect to a remote network, can include multiple dial strings. Each dial string, in turn, can be associated with its own map class which defines all the characteristics for any call to the specified dial string. Refer to dialer profiles of interface dialer 0 which are illustrated in Figure 10-5on page 10-9and Figure 10-6on page 10-10.

Dialer Strings

Setting dialer strings is straightforward but their configuration is very flexible. You can specify multiple dialer strings for the same dialer interface and each dialer string can be associated with a different dialer map class.

Dialer Pool

Each dialer interface uses one group of physical interfaces called a dialer pool. The physical interfaces in a dialer pool are called into use based on a priority value for selection by the XSR. Again, Serial interfaces can belong to multiple dialer pools, allowing a small number of resources to service a large number of users. The disadvantage of this method is that all resources may be in use when a user tries to access them.

Addressing Dialer Resources

There are two ways of setting up addressing on dialer resources, as follows.

•Applying a Subnet to the Dialer Cloud —Each site linked to the dialer cloud receives a unique node address on a shared subnet for use on its dialer interface. This method is similar to numbering a LAN or multipoint WAN and simplifies the addressing scheme and creating static routes.

•Using Unnumbered Interfaces —Similar to using unnumbered addressing on leased line point- to-point interfaces, the address of another interface on the XSR is borrowed for use on the dialer interface. Unnumbered addressing takes advantage of the fact that there are only two devices on the point-to-point link.

The routing table points to an interface (the dialer interface) and a next-hop address. When building static routes for unnumbered interfaces the XSR must be configured with the interface that finds the next-hop out.

XSR User’s Guide 10-5