Ericsson ECN330, User Manual

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Configuring the ECN330-switch
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1553-KDU 137 365 Uen D 2006-06-16
6.20.10.9 Configuring NSSA Settings
Use the OSPF / NSSA Settings page to configure a not-so-stubby area (NSSA),
and to control the use of default routes for ABRs and ASBRs, or external routes
learned from other routing domains and imported through an ABR. (For a
detailed description of NSSA areas, refer to “Configuring OSPF Areas” on
page 442.)
Command Attributes
• Area ID – Identifier for an not-so-stubby area (NSSA).
• Default Information Originate – An NSSA ASBR originates and floods
Type-7 external LSAs throughout its area for known network destination
outside of the AS. However, an NSSA ASBR can also be configured to
generate a Type-7 “default” route to areas outside of the AS, or an NSSA
ABR to generate a Type-7 “default” route to other areas within the AS.
(Default: Disabled)
• No Redistribution – The Redistribute Configuration page (page 460) is
used to import information from other routing domains (or protocols) into
the AS. However, when the router is an NSSA ABR, it can be configured
to accept or not accept external routes learned from routers in other
OSPF areas into the NSSA. (Default: Enabled)
Note: This router supports up 16 areas, either normal transit areas, stubs, or
NSSAs.