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Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 35 Configuring IP Unicast Routing
Configuring Protocol-Independent Features
Use a network monitoring privileged EXEC command such as
show ip ospf interface
to verify the
interfaces that you enabled as passive, or use the
show ip interface
privileged EXEC command to verify
the interfaces that you enabled as active.
To re-enable the sending of routing updates, use the
no passive-interface
interface-id
router
configuration command. The
default
keyword sets all interfaces as passive by default. You can then
configure individual interfaces where you want adjacencies by using the
no passive-interface
router
configuration command. The
default
keyword is useful in Internet service provider and large enterprise
networks where many of the distribution routers have more than 200 interfaces.
Controlling Advertising and Processing in Routing Updates
You can use the
distribute-list
router configuration command with access control lists to suppress routes
from being advertised in routing updates and to prevent other routers from learning one or more routes.
When used in OSPF, this feature applies to only external routes, and you cannot specify an interface
name.
You can also use a
distribute-list
router configuration command to avoid processing certain routes listed
in incoming updates. (This feature does not apply to OSPF.)
Beginning in privileged EXEC mode, follow these steps to control the advertising or processing of
routing updates:
Use the
no distribute-list in
router configuration command to change or cancel a filter. To cancel
suppression of network advertisements in updates, use the
no distribute-list out
router configuration
command.
Filtering Sources of Routing Information
Because some routing information might be more accurate than others, you can use filtering to prioritize
information coming from different sources. An
administrative distance
is a rating of the trustworthiness
of a routing information source, such as a router or group of routers. In a large network, some routing
protocols can be more reliable than others. By specifying administrative distance values, you enable the
Step 7
end
Return to privileged EXEC mode.
Step 8
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
|
eigrp
}
Enter router configuration mode.
Step 3
distribute-list
{
access-list-number
|
access-list-name
}
out
[
interface-name
|
routing
process
|
autonomous-system-number
]
Permit or deny routes from being advertised in routing
updates, depending upon the action listed in the access list.
Step 4
distribute-list
{
access-list-number
|
access-list-name
}
in
[
type-number
]
Suppress processing in routes listed in updates.
Step 5
end
Return to privileged EXEC mode.
Step 6
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Содержание 3750G - Catalyst Integrated Wireless LAN Controller
Страница 80: ...1 28 Catalyst 3750 Switch Software Configuration Guide OL 8550 02 Chapter 1 Overview Where to Go Next ...
Страница 606: ...27 8 Catalyst 3750 Switch Software Configuration Guide OL 8550 02 Chapter 27 Configuring UDLD Displaying UDLD Status ...
Страница 670: ...31 18 Catalyst 3750 Switch Software Configuration Guide OL 8550 02 Chapter 31 Configuring SNMP Displaying SNMP Status ...
Страница 1048: ...41 20 Catalyst 3750 Switch Software Configuration Guide OL 8550 02 Chapter 41 Configuring MSDP Monitoring and Maintaining MSDP ...
Страница 1086: ...43 26 Catalyst 3750 Switch Software Configuration Guide OL 8550 02 Chapter 43 Troubleshooting Using the crashinfo Files ...
Страница 1104: ...B 4 Catalyst 3750 Switch Software Configuration Guide OL 8550 02 Appendix B Supported MIBs Using FTP to Access the MIB Files ...
