Understanding Ether1; Understanding The Interfaces On The Standalone Ethernet Boards; Overview Of Portmaster 4 Ethernet Interfaces - Lucent Technologies PortMaster 4 Configuration Manual

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Understanding Ether1

The Ethernet board (Ether1) in the manager module is accessed in logical slot 10 and

gets its power directly from the manager board. Ether1 can operate at 10Mbps or

100Mbps full duplex. Ether1 is physically on the Ethernet board and communicates

with the manager board over the passive ATM backplane.

Ether1 is supported by two CPUs. One CPU processes inbound data, the other processes

outbound data. Ether1 does not shut down in a low power situation or due to

overheating. Ether1 maintains its own forwarding table, which it learns from the

manager board. You cannot configure Ethernet subinterfaces on Ether1.

Whenever you make changes to the Ether1 interface, you must reset it for the changes

to take effect. Because Ether1 resides in logical slot 10, you reset the Ether1 interface

with the following command:

Command> reset slot10

Resetting slot 10 reboots the Ethernet board connected to the manager board in slot 4.

During PPP negotiations for the IP Control Protocol (IPCP), the PortMaster 4 uses the

following order of precedence when choosing an IP address to identify itself:

1. The Local IP address configured in the user profile, if set

2. The global reported IP address, if set

3. The first global local IP address, if set

4. The second global local IP address, if set

5. The third global local IP address, if set

6. The fourth global local IP address, if set

7. The IP address of Ether1

8. The IP address of Ether0

Note – RADIUS packets leaving the PortMaster 4 have the source IP address of Ether1,

even if the packet exits through Ether0.

The 10Mbps or 100Mbps full-duplex Ethernet interfaces on standalone Ethernet boards

are identified by a numbering scheme that refers to the slot in which the board is

installed. The single-interface board can be installed in any slot except slot 4. A

single-interface board installed in slot 3, for example, is designated Ether30. If the

board is installed in slot 5, it is designated Ether50.

The dual-interface Ethernet board can be installed in slot 3 only, and the two interfaces

on the board are always Ether30 and Ether31. See "Configuring Standalone Ethernet

Boards" on page 4-8 for more information.

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PortMaster 4 Configuration Guide

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