Avaya Configuring IP Services Manual de usuario Pagina 52

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Configuring IP Services
2-24
If IP flushes a route from the routing table, it also removes the route from the
forwarding tables, thus ensuring that invalid routing information is not retained in
interface-specific caches.
Connecting the Router to a Blacker Front End
The Blacker Front End (BFE) is a classified encryption device used by hosts that
want to communicate across unsecured wide area networks. BFE devices are
typically found in government networks (for example, DSNET), which handle
sensitive data requiring a greater degree of security.
Blacker Front End support allows the router to connect to BFE devices. The BFE
device, in turn, provides the router with encryption services while acting as the
Data Communications Equipment (DCE) end of the connection between the
router and the X.25 network (Figure 2-8).
Hosts using attached BFE devices can communicate with each other over an
unsecured packet-switched network using data paths secured by the encryption
services of the BFEs. These hosts are part of a Red virtual network. The packet-
switched network that carries both the data secured by BFEs and any other
unsecured data is known as the Black network.
Figure 2-8. Blacker Front End Network Configuration
Site Manager allows you to configure the size of the forwarding table associated with an
IP interface by specifying the maximum number of entries in the cache FIFO buffer. For
information, see the Max Forwarding Table Size parameter on page 2-48.
Router
BFE
Router
BFE
Router
BFE
X.25 DDN
Black Network
Red Network
Key
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