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Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions. All rights reserved. Cisco Press. Join Sign In. Date: Mar 27, Contents Objectives Key Terms Introduction 2. Chapter Description This chapter explains the types of static routes as well as the advantages and disadvantages of each type. It also addresses routing configuration and troubleshooting.
Configure Summary and Floating Static Routes 2. Configure IPv4 Summary Routes 2. Route Summarization 2. For the summary route shown above, you can use this command:. In IOS Your email address will not be published. Notice: It seems you have Javascript disabled in your Browser.
In order to submit a comment to this post, please write this code along with your comment: 16efcbfdefcb33dbeed. There are two types of route summarization in OSPF.
Inter-Area Route Summarization Although summarization could be configured between any two areas, it is better to summarize in the direction of the backbone. External Route Summarization External route summarization is specific to external routes that are injected into OSPF via redistribution. Then apply a filter to isolate them for a device or a network view. The typical format of a Route Target is two numeric values separated by colons.
For example, The Route Targets summary in the left panel shows the list of Import and Export route targets that are defined in VRF-aware devices in the managed networks. This window also lists all devices forming the VRF network. Selecting a route target causes the center panel to display all the instances where it is being used, along with details of the device and the VRF.
To view the complete list of network views, click the View all Network Views link at the top of the list. You can list all network views containing networks managed by NetMRI, or the network views that are associated with a particular device group. Each network view listed in the left panel provides a link to the Network View window. The Count value indicates the number of interfaces sharing the same network view.
Each instance is differentiated by the interface name. If you have a significant number of network views, you can apply a filter by clicking the Filters button at the top of the table, choosing the Network View option from the Select a New Field selector, and entering the name of the network view.
For more information about network views and how to use and configure them, see Configuring Network Views and its subsections. After virtual routing and forwarding VRF networks are discovered and mapped to network views, you can use the VRFs summary to view the complete list of VRF instances throughout the managed network. The rules for redistribution on a Cisco router dictate that the redistributed route be present in the routing table.
It is not sufficient that the route be present in the routing topology or database. Routes with a lower Administrative Distance AD are always installed in the routing table. In order to redistribute the static route into IGRP on R5, you need to use the redistribute static command under the router rip command. There are two methods to get a connected route:. An interface is configured with an IP address and mask, this corresponding subnet is considered a connected route.
A static route is configured with only an outgoing interface, and not an IP next-hop, this is also considered a connected route. For example, if an interface has address This static route, See the Avoiding Problems Due to Redistribution section of this document for tips on how to avoid this problem.
An example of IGRP metrics follows:. However, running two processes of the same protocol on the same router is rarely necessary, and can consume the router's memory and CPU. A redistributed static route takes precedence over the summary route because the static route has an administrative distance of 1 whereas Eigrp summary route has an administrative distance of 5. This happens when a static route is redistributed with the use of redistribute static under the Eigrp process and the Eigrp process has a default route.
When there is a major net that is subnetted, you need to use the keyword subnet to redistribute protocols into OSPF. Without this keyword, OSPF only redistributes major nets that are not subnetted. It is possible to run more than one OSPF process on the same router. However, running more than one process of the same protocol is rarely needed, and consumes the router's memory and CPU. You do not need to define metric or use the default-metric command when redistributing one OSPF process into another.
The RIP metric is composed of hop count, and the maximum valid metric is Anything above 15 is considered infinite; you can use 16 to describe an infinite metric in RIP. When redistributing a protocol into RIP, Cisco recommends that you use a low metric, such as 1. A high metric, such as 10, limits RIP even further. If you define a metric of 10 for redistributed routes, these routes can only be advertised to routers up to 5 hops away, at which point the metric hop count exceeds By defining a metric of 1, you enable a route to travel the maximum number of hops in a RIP domain.
But, doing this increases the possibility of routing loops if there are multiple redistribution points and a router learns about the network with a better metric from the redistribution point than from the original source, as explained in the Administrative Distance section of this document. Therefore, you have to make sure that the metric is neither too high, preventing it from being advertised to all the routers, or too low, leading to routing loops when there are multiple redistribution points.
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