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FTOS Configuration Guide for the C-Series - Force10 Networks

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Line card interfaces support Layer 2 and Layer 3 traffic over <strong>the</strong> 10/100/1000, Gigabit, and 10-Gigabit<br />

E<strong>the</strong>rnet interfaces. SONET interfaces with PPP encapsulation support Layer 3 traffic. These interfaces<br />

(except SONET interfaces with PPP encapsulation) also can become part of virtual interfaces such as<br />

VLANs or port channels.<br />

For more in<strong>for</strong>mation on VLANs, see VLAN Interfaces and Layer 3 on page 266 and <strong>for</strong> more in<strong>for</strong>mation<br />

on port channels, see Port Channel Interfaces on page 255.<br />

<strong>FTOS</strong> Behavior: S-<strong>Series</strong> systems use a single MAC address <strong>for</strong> all physical interfaces while<br />

E-<strong>Series</strong> and C-<strong>Series</strong> use a unique MAC address <strong>for</strong> each physical interface, though this results in no<br />

functional difference between <strong>the</strong>se plat<strong>for</strong>ms.<br />

Auto-Negotiation on E<strong>the</strong>rnet Interfaces<br />

By default, auto-negotiation is enabled on interfaces of 100/1000 Base-T E<strong>the</strong>rnet line cards and fiber line<br />

cards. Only <strong>the</strong> 10GE line cards do not support auto-negotiation. When using 10GE line cards, verify that<br />

<strong>the</strong> settings on <strong>the</strong> connecting devices are set to no auto negotiation.<br />

With <strong>the</strong> 10/100/1000 E<strong>the</strong>rnet line cards, <strong>the</strong> negotiation auto command is tied to <strong>the</strong> speed command.<br />

Auto-negotiation is always enabled when <strong>the</strong> speed command is set to 1000 or auto.<br />

The negotiation auto command provides a mode option <strong>for</strong> configuring an individual port to <strong>for</strong>ced<br />

master/<strong>for</strong>ced slave once auto negotiation is enabled.<br />

Caution: Ensure that one end of your node is configured as <strong>for</strong>ced-master and one is configured<br />

as <strong>for</strong>ced-slave. If both are configured <strong>the</strong> same (that is <strong>for</strong>ced-master or <strong>for</strong>ced-slave), <strong>the</strong> show<br />

interface command will flap between an auto-neg-error and <strong>for</strong>ced-master/slave states.<br />

<strong>Configuration</strong> Task List <strong>for</strong> Physical Interfaces<br />

By default, all 10/100/1000, Gigabit and 10 Gigabit E<strong>the</strong>rnet and SONET interfaces are disabled to traffic.<br />

The following list includes <strong>the</strong> configuration task <strong>for</strong> physical interfaces:<br />

• Enabling an interface (mandatory)<br />

• Configuring Layer 2 mode (optional)<br />

• Configuring Layer 3 mode (optional)<br />

• Clearing interface counters (optional)<br />

248 Interfaces

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