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FTOS Configuration Guide for the C-Series - Force10 Networks

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Note: On <strong>the</strong> E-<strong>Series</strong>, only <strong>the</strong> first byte of <strong>the</strong> alternate E<strong>the</strong>rtype value is configurable. So, E<strong>the</strong>rtypes<br />

with a common first byte are not supported as separate E<strong>the</strong>rtype values. For instance, 0x9100 and<br />

0x91A8 cannot be distinguished as separate E<strong>the</strong>rtypes.<br />

To view <strong>the</strong> non-default VLAN-Stack protocol type configuration, use <strong>the</strong> show running-config<br />

command in <strong>the</strong> EXEC privilege mode. If you do not change <strong>the</strong> protocol-type value, <strong>the</strong> default value<br />

0x9100 is used and it does not appear in <strong>the</strong> running-config.<br />

Configuring Layer 2 protocol tunneling<br />

To enable Layer 2 protocol tunneling (L2PT) on a VLAN-Stack VLAN, use <strong>the</strong> following commands:<br />

Command Syntax Command Mode Purpose<br />

protocol-tunnel enable CONFIGURATION Enable protocol tunneling globally on <strong>the</strong> system.<br />

Note: <strong>FTOS</strong> must have <strong>the</strong> default CAM profile with<br />

<strong>the</strong> default microcode be<strong>for</strong>e you enable L2PT.<br />

protocol-tunnel stp INTERFACE<br />

VLAN STACK<br />

See <strong>the</strong> sample configuration in Configuring an E-<strong>Series</strong> VLAN-Stack trunk port to tunnel customer<br />

BPDUs on page 240.<br />

Rate-limit BPDUs (optional): To rewrite <strong>the</strong> well-known destination MAC address to <strong>the</strong> <strong>Force10</strong><br />

proprietary MAC address, <strong>the</strong> BPDUs are <strong>for</strong>warded to <strong>the</strong> RPM. You can rate-limit BPDUs and configure<br />

<strong>the</strong> switch to start dropping BPDUs when <strong>the</strong> threshold is reached. Use <strong>the</strong> following command in<br />

CONFIGURATION mode:<br />

Command Syntax Command Mode Purpose<br />

Specify BPDU tunneling across <strong>the</strong> VLAN-Stack<br />

VLAN.<br />

protocol-tunnel rate-limit rate CONFIGURATION Configure a maximum rate at which <strong>the</strong> RPM<br />

CPU will process L2PT frames.<br />

Default: 75<br />

Range: 75 to 4000<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 233

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