hello

i mean how the router has to build map for the routing domain

2)when we use LAS typ4 in OSPF?

THANKS

Ali,

> i mean how the router has to build map for the routing domain

Each router runs the Shortest Path First (SPF) algorithm and build a root tree with itself as the root. The result of this calculation is a best path to each subnet in the network.

2) OSPF LSA type 4 is used to provide connectivity to a given ASBR. All areas in the autonomous system will have this lsa type 4, except for the area where the ASBR resides. This area doesn't need the LSA type 4 to calculate connectivity to the ASBR as it will use the LSA type 1 and 2 to do so.

Regards

HELLO AGAIN

WHAT'S THE MEANING OF ADDRESS-FAMILY?why they called it address-family?

THANKS

Ali,

Address-family is just what the name indicates, different family of addresses. For exemple, IPv4, IPv6, IPX, AppleTalk, etc.

Please refer to the following document for a list of registered address-family numbers:

http://www.iana.org/assignments/address-family-numbers/address-family-numbers.xhtml

Regards