Filtering routing information, Setting passive interfaces – Dell POWEREDGE M1000E User Manual

Page 995

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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide

OL-13270-03

Chapter 38 Configuring IP Unicast Routing

Configuring Protocol-Independent Features

Use the no route-map map-tag global configuration command or the no match or no set route-map
configuration commands to delete an entry. Use the no ip policy route-map map-tag interface
configuration command to disable PBR on an interface. Use the no ip route-cache policy interface
configuration command to disable fast-switching PBR. Use the no ip local policy route-map map-tag
global configuration command to disable policy-based routing on packets originating on the switch.

Filtering Routing Information

You can filter routing protocol information by performing the tasks described in this section.

Note

When routes are redistributed between OSPF processes, no OSPF metrics are preserved.

Setting Passive Interfaces

To prevent other routers on a local network from dynamically learning about routes, you can use the
passive-interface router configuration command. Then routing update messages are not being sent
through a router interface. When you use this command in the OSPF protocol, the interface address that
you specify as passive appears as a stub network in the OSPF domain. OSPF routing information is
neither sent nor received through that interface.

In networks with many interfaces, you do not need to manually set them as passive. You can set all
interfaces to be passive by default by using the passive-interface default router configuration command.
You can then manually setting interfaces where adjacencies are desired.

Beginning in privileged EXEC mode, follow these steps to configure passive interfaces:

Step 11

end

Return to privileged EXEC mode.

Step 12

show route-map [map-name]

(Optional) Display all configured route maps or only the one
specified to verify configuration.

Step 13

show ip policy

(Optional) Display policy route maps attached to interfaces.

Step 14

show ip local policy

(Optional) Display whether or not local policy routing is
enabled and, if so, the route map being used.

Step 15

copy running-config startup-config

(Optional) Save your entries in the configuration file.

Command

Purpose

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

router {bgp | rip | ospf | eigrp}

Enter router configuration mode.

A switch running the IP base feature set supports only the rip
keyword.

Step 3

passive-interface interface-id

Suppress sending of routing updates through the specified Layer 3
interface.

Step 4

passive-interface default

(Optional) Set all interfaces as passive by default.

Step 5

no passive-interface interface type

(Optional) Activate only those interfaces that need to have
adjacencies sent.

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