HP 200 Series Services And Applications page 142

Internet Protocol Routing Service
Virtual IP Host on Non-IP Networks
Virtual IP Host on Non-IP Networks
A router is often used in non-IP environments, for example, as a Novell IPX
router or as a bridge. Sometimes in these environments it is desirable to
have access to the router device management capabilities listed above, but
without the burden of planning and configuring an IP routing network. The
HP routers provide this capability by supporting an "IP host-only bridging"
mode (as an alternative to the "router and host" mode for IP routing), in
which the router is configured as a virtual IP host to support Ping, Telnet,
TFTP, time protocol, and SNMP management. Routing protocols are disabled
in this mode, and IP packets are bridged, not routed, throughout the net-
work.
To use the device management capabilities of the routers, as well as those of
the network management station, IP can be configured in IP host-only bridg-
ing mode. In this mode, the routers will not send routing messages of any
type. IP addresses must be assigned only to router interfaces on which you
anticipate having device management (IP) traffic information. The example
network in figure 17 is configured to have IP traffic on all links except the
LANs in Chicago and Washington D.C. Note that the IP addresses are the
same for all IP interfaces on any single router. The subnet mask is the same
for all IP router interfaces and devices throughout the network. The same IP
address resolution protocol must be used on all of the IP router interfaces—
ARP, HP Probe, or both.
Note that the bridging service must always be enabled to support this IP
host-only bridging mode. All IP network traffic will be bridged. In the bridge
network, there is no need to divide the IP network into subnetworks since
the entire network is now a single IP subnetwork, A.
Consider the Novell IPX internetwork in figure 17. The three sites are each
connected to one another through a router over point-to-point WAN links.
Novell IPX traffic can be present on all links that are shown. On the LAN at
the Los Angeles site is a network management station running the SNMP-
based HP OpenView Interconnect Manager application.
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