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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

passive-interface — router

Synopsis

passive-interface interface
no passive-interface interface

Configures

Disables a routing protocol on a specific interface either partially (RIP, IGRP) or completely (EIGRP, OSPF, etc.)

Default

None

Description

For RIP and IGRP, this command causes the specified interface to listen for routing updates but prevents it from sending them. For OSPF, EIGRP, or other “hello-based” routing protocols, this command effectively disables the protocol on that interface (both sending and receiving). These protocols cannot operate without exchanging hello messages.

Example

router igrp 100
  network 10.0.0.0
  ! Suppress routing advertisements on serial 1
  passive-interface serial 1

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