Cisco Catalyst 4500 Series Command Reference Manual page 564

passive-interface
You can define up to five interface ranges on a single command; separate each range with a comma:
interface range gigabitethernet 5/1-20, gigabitethernet4/5-20.
Use this format when entering the port-range:
•
You cannot specify both a macro and an interface range in the same command. After creating a macro,
you can enter additional ranges. If you have already entered an interface range, the CLI does not allow
you to enter a macro.
You can specify a single interface in the range range value. This makes the command similar to the
passive-interface interface-number command.
The range keyword is only supported in OSPF, EIGRP, RIP, and ISIS router mode.
Note
If you disable the sending of routing updates on an interface, the particular subnet will continue to be
advertised to other interfaces, and updates from other routers on that interface continue to be received
and processed.
The default keyword sets all interfaces as passive by default. You can then configure individual
interfaces where adjacencies are desired using the no passive-interface command. The default keyword
is useful in Internet service provider (ISP) and large enterprise networks where many of the distribution
routers have more than 200 interfaces.
For the Open Shortest Path First (OSPF) protocol, OSPF routing information is neither sent nor received
through the specified router interface. The specified interface address appears as a stub network in the
OSPF domain.
For the Intermediate System-to-Intermediate System (IS-IS) protocol, this command instructs IS-IS to
advertise the IP addresses for the specified interface without actually running IS-IS on that interface. The
no form of this command for IS-IS disables advertising IP addresses for the specified address.
For IS-IS you must keep at least one active interface and configure the interface with the ip router isis
Note
command.
Enhanced Interior Gateway Routing Protocol (EIGRP) is disabled on an interface that is configured as
passive although it advertises the route.
Examples The following example sends EIGRP updates to all interfaces on network 10.108.0.0 except
GigabitEthernet interface 1/1:
Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# router eigrp 109
Switch(config-router)# network 10.108.0.0
Switch(config-router)# passive-interface gigabitethernet 1/1
Switch(config-router)#
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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interface-type {mod}/{first-port} - {last-port}
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
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