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5. IP Addressing
5-2
May 2002 8700-A2-GB20-40
All Configurations
The NTU obtains its IP address when the PPP link is established over the EOC.
Use the ATI to assign:
An IP address for each NMS. See Table A-14, SNMP NMS Security Options,
in Appendix A,
Configuration Options
.
An IP address for the TFTP server you wish to use to upload and download
configurations. See
Configuration Loader
in Chapter 9,
Transferring Firmware
and Configurations Using TFTP
, and the documentation for your TFTP server.
Review the following information in preparation for selecting an IP addressing
scheme.
Any legal host address is allowed for a given subnet. The address choice
within the subnet is arbitrary.
A single route to a subnet is all that is needed to reach every device on a
subnet. The unit’s routing table supports a maximum of 20 routes.
IP Addressing Example
Figure 5-1, Peer IP Address Assignments, shows IP addressing in a typical
network. Note that the Peer IP Address:
Refers to the IP address of the unit configured as an NTU.
Is assigned by the LTU.
Figure 5-1. Peer IP Address Assignments
99-16617
DSLAM
DSLAM
79xx
79xx
79xx
MCC Base
Address = 126.35.50.1
MCC Base Subnet
Mask = 255.255.255.0
Port 1
Peer IP Address = 126.35.1.32
MCC
LTU
87xx
Port 2
Peer IP Address = 126.35.1.33
Port 3
Peer IP Address = 126.35.1.34
Port 4
Peer IP Address = 126.35.1.35
NTU
MCC
MCC Backplane
Address = 126.35.1.1
MCC Backplane
Mask = 255.255.255.0
LTU Backplane
Address = 126.35.1.16
NTU Backplane
Address = 126.35.50.17
79xx
79xx
79xx
Port 5
Peer IP Address = 126.35.1.36
Port 6
Peer IP Address = 126.35.1.37
Port 7
Peer IP Address = 126.35.1.38
Port 8
Peer IP Address = 126.35.1.39
79xx