Microsoft ES4625, ES4649 manual Ospf Summary Address Configuration

3 Configuring the Switch

Configuring Summary Addresses (for External AS Routes)

An Autonomous System Boundary Router (ASBR) can redistribute routes learned from other protocols into all attached autonomous systems. (See “Redistributing External Routes” on page 3-253)To reduce the amount of external LSAs imported into your local routing domain, you can configure the router to advertise an aggregate route that consolidates a broad range of external addresses.

Command Usage

•If you are not sure what address ranges to consolidate, first enable external route redistribution via the Redistribute Configuration screen, view the routes imported into the routing table, and then configure one or more summary addresses to reduce the size of the routing table and consolidate these external routes for advertising into the local domain.

•To summarize routes sent between OSPF areas, use the Area Range Configuration screen (page 3-241).

Command Attributes

•IP Address – Summary address covering a range of addresses.

•Netmask – Network mask for the summary route.

Note: This router supports up 16 Type-5 summary routes.

Web - Click Routing Protocol, OSPF, Summary Address Configuration. Specify the base address and network mask, then click Add.

Figure 3-142 OSPF Summary Address Configuration

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