
Requirements Outside the ISP Network
303509-A Rev 00 8-5
Configuring the Adjacent Host and Static Routes
The next step is to create a single adjacent host entry and two (or more) static
route entries:
• One static route points back to each dial-in user community, so that the CPE
router has a path through the frame relay or PPP cloud to forward replies back
to the remote user nodes.
• The second static route entry goes back to the Dial VPN gateway, so that the
RADIUS server on the CPE network can forward the authentication requests
back to the RADIUS client on the gateway.
How the Adjacent Host Entry and Static Routes Work Together
The adjacent host entry is required because Bay Networks routers do not
configure a MAC layer address (in this case, a frame relay DLCI entry) as the
destination address of an IP static route entry. In essence, the adjacent host
mechanism provides a workaround solution.
By definition, an adjacent host is a device that is adjacent to yours on the same
network. In the following example, which refers to Figure 8-1
, the gateway router
is not on the same IP network. To get to the gateway, a DLCI of 101 maps a PVC
back to that router.
You create a pseudonode in the adjacent host address field, which is a placeholder
to map the pseudo (made up) address of 10.200.0.100 to the known DLCI 101,
rather than to the real address of the gateway router. Then, when the static route
entries to the gateway router destination network of 10.3.0.1 are entered, you can
use the pseudoaddress 10.200.0.100 as the next-hop address. The adjacent host
entry will come into play and tell the CPE router that to get to that network it must
send the traffic out DLCI 101.
10.Click on the port connector button,
select Edit Circuit, then select
Interfaces.
The Frame Relay Interface List window
opens.
11.In the Frame Relay Interface List
window, set the Management Type
parameter to ANSI T1 617D. When
finished, click on
Apply
, then on
Done
.
The Configuration Manager window opens.
The procedure is complete.
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