Configure Iproute Add Blackhole Default - Extreme Networks ExtremeWare Command Reference Manual

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configure iproute add blackhole default

Adds a default blackhole route to the routing table. All traffic destined for an unknown IP destination is

silently dropped, and no Internet Control Message Protocol (ICMP) message is generated.

Syntax Description

This command has no arguments or variables.

Usage Guidelines

While a default route is for forwarding traffic destined to an unknown IP destination, and a blackhole

route is for discarding traffic destined to a specified IP destination, a default blackhole route is for

discarding traffic to the unknown IP destination.

Using this command, all traffic with an unknown destination is discarded. If there is another static

default route existing in the routing table, the

route takes higher route priority.

blackhole default

The default blackhole route is treated like a permanent entry in the event of a switch reset or power

off/on cycle. The default blackhole route's origin is "b" or "blackhole" and the gateway IP address for

this route is 0.0.0.0.

The following command adds a blackhole default route into the routing table:

configure iproute add blackhole default

This command was first available in ExtremeWare 6.2.2.

Platform Availability

This command is available on all platforms.

ExtremeWare Software 7.3.0 Command Reference Guide

Extremeware 7.3.0