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3170-A2-GB20-20
December 1996
IP Network Addressing Scenario
Overview
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IP Network Addressing
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Overview
This appendix describes a means of configuring 31xx
Series devices in an Internet Protocol (IP) network to
provide SNMP connectivity to a network management
system (NMS). Since there are many possible network
addressing schemes, this appendix describes an addressing
scheme for a typical customer network scenario. This
appendix is not intended to be an IP addressing or routing
tutorial, and a basic understanding of IP and 31xx Series
features is assumed.
IP Network Addressing
The IP network addressing scenario (Figure F-1)
consists of a series of standalone 31xx Series devices
daisy chained together, with remotes connected via the
FDL. In this scenario, all 31xx Series devices are on the
same subnet (135.18.1.0). The subnet mask for each
device is FF.FF.FF.00. A static route is set in the NMS
host to subnet 135.18.1.0.
The following notes apply to this scenario:
•
Connections to remote devices may be via EDL or
FDL; however, the FDL is only available on full E1
links (not fractional E1s). Check with the service
provider to be sure that the FDL is end-to-end (i.e.,
not terminated at an intermediate point within the
network).
•
Interconnected 31xx Series devices automatically
pass routing information between them; however, a
static route to the subnet(s) must be set in the
routing table of the NMS host. This route uses the
31xx Series device connected to the LAN (via the
LAN Adapter), or the NMS (via a direct PPP or
SLIP connection) as a gateway to the subnet(s). In
all instances, the addressing scheme presented
works for both the LAN and the direct connections.
•
Although routing table entries are maintained
automatically by 31xx Series devices, without the
need for user configuration, only a maximum of
100 routes is supported for a given device.
•
The choice of a host address within a given subnet
is completely arbitrary. Choose any legal host
address for a given subnet, without regard to the
local or remote devices.
•
Although the default route (to the NMS) is
configurable for all devices, only devices that have
a direct external connection to an NMS (via the
COM or AUX ports) need a default route set. In the
following example, the default port (COM or AUX)
is set in the device connected to the LAN Adapter.
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