Figure 5: Normal Areas - Avaya 8600 Engineering

LSA Type Description
4 LSA Type 4 are called ASBR-summary-LSAs
and advertises the location of the ASBRs from
area to area
5 LSA Type 5 are called AS-external-LSAs.
Describes networks outside of the OSPF
domain. Originated by the ASBR and passed
between areas. In Stub and NSSA area, LSA
Type 5 routes are replaced with a single default
route.
LSA Type 6 are called group-membership-
6
LSAs. Used to identify the location of Multicast
group members in MOSPF.
7 LSA Type 7 are used in OSPF NSSA areas to
import external routes.
8.2.1 Normal Areas
A normal area is simply a collection of routers using the same Area-ID that calculates inter-area and
external routes through the use of summary-LSAs, ASBR-summary-LSAs, and AS-external-LSAs. A
Normal Area supports ABR and ASBRs.
8.2.1.1 Configuring the ABR
There is no configuration parameter to configure a Ethernet Routing Switch 8600 as an ABR. It becomes
an ABR automatically when more than one area is configured on it.
8.2.1.2 Configuring the ASBR
When configuring an OSPF ASBR on the Ethernet Routing Switch 8600, it can be configured to:

Distribute all OSPF routes to BGP or RIP.

Distribute RIP, BGP, Direct, or static routes to OSPF
November 2010

Figure 5: Normal Areas

ERS 8600 / 8800 OSPF Technical Configuration Guide
Area of Distribution
Passed between areas.
Passed between areas.
Passed between areas.
Translated between areas.
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