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Configuring the Sample Network A-3
set dhcp server dns1 192.168.200.254 dns2 0.0.0.0
set dhcp server wins1 0.0.0.0 wins2 0.0.0.0
add dns host ocrdsl-3com.com addr 192.168.200.254
add dns server MyCorp.com primary 192.168.1.253
add dns server * vc Internet
enable dns
When a DNS request is received from a locally attached workstation, the OCR 812
will search the local static table to find an entry. If one is not found, the request
will be forwarded to a Remote DNS Server. The DNS Server is selected by
comparing the domain name within the Request.
If the Request was for www.MyCorp.com/events/local the domain MyCorp.com
would match given our configuration and the request would be forwarded to the
DNS Server at 192.168.1.253.
If a request was for www.3com.com, a match would not be found in the Remote
server table and therefore the request would be forwarded to the default Remote
DNS Server. In this case, the Remote DNS Server is dynamically learned when the
connection to the remote site “Internet” is first established.
After a workstation is rebooted and is configured automatically by the OCR 812’s
DHCP Server, the 812’s browser-based Manager can attach to the OCR 812 by
typing in ocrdsl-3com.com in the Browser’s location field. If the OCR 812’s DNS
functionality is disabled, the manager can still be accessed by using the OCR 812’s
LAN address (i.e., 192.168.200.254 for this configuration).
LAN IPX Network
Configuration
The local IPX Network is defined with a Network Number of 10 and an identifying
name of “ipx”. Routes and Services will be dynamically learned using RIP and SAP
once the Remote Site to MyCorp is established. The following commands are
executed:
add ipx network ipx address 10 frame ethernet_ii enable yes
set ipx net ipx rip both sap both
Bridge Configuration A Bridge network is configured for the LAN. With our example, IP and IPX are
routed over the Corporate Remote Site and all other protocols (e.g. AppleTalk) will
be bridged. The Bridge network is added with the following commands:
disable bridge spanning_tree
add bridge network bridge
Remote Site: Internet In our example, we have two defined Remote Sites. In this section, the Remote
Site to the ISP is defined with the identifying name of “Internet”. The configured
network service is PPP, our local WAN address and the remote router address will
be dynamically learned when the connection is established. In addition, we will