Create Fdbentry Vlan Blackhole - Extreme Networks ExtremeWare Command Reference Manual

Hide thumbs Also See for ExtremeWare:

Table of Contents

create fdbentry vlan blackhole

create fdbentry <mac_address> vlan <vlan name> blackhole {source-mac |

dest-mac | both}

Creates a blackhole FDB entry.

Syntax Description

Usage Guidelines

Blackhole entries are useful as a security measure or in special circumstances where packets with a

specific source or destination address must be discarded.

A blackhole entry configures the switch to discard packets with the specified MAC address. You can

specify whether the MAC address should match the source (ingress) MAC address, or the destination

(egress) MAC address, or both.

Blackhole entries are treated like permanent entries in the event of a switch reset or power off/on cycle.

Blackhole entries are never aged-out of the database. In the output from a

will have "p" flag (permanent) set, as well as the "b" (for ingress blackhole) and/or "B" (for egress

blackhole) flags set.

The following example adds a blackhole entry to the FDB for MAC address is 00 E0 2B 12 34 56, in

VLAN marketing on port 4:

create fdbentry 00:E0:2B:12:34:56 vlan marketing both

This command was available in ExtremeWare 2.0.

Support for specifying source or destination MAC address was added in ExtremeWare 6.2.

ExtremeWare 7.5 Command Reference Guide

Specifies a device MAC address, using colon-separated bytes.

Specifies a VLAN name associated with a MAC address.

Configures the MAC address as a blackhole entry.

Specifies that the blackhole MAC address matches the ingress source MAC address. Support

for this parameter was added in ExtremeWare 6.2.

Specifies that the blackhole MAC address matches the egress destination MAC address.

Support for this parameter was added in ExtremeWare 6.2.

Specifies that the blackhole MAC address matches the ingress source MAC address or the

egress destination MAC address. Support for this parameter was added in ExtremeWare 6.2.

create fdbentry vlan blackhole

command, entries

Extremeware 7.5