NSSAs are similar to the OSPFv3 stub area
configuration option, but have the following two additional capabilities:
External routes originating from an ASBR connected to the NSSA can
be advertised within the NSSA.
External routes originating within the NSSA can be propagated to
other areas if translated to AS-external LSAs. When configuring an OSPFv3 area as an
NSSA, the translate option should only be used on NSSA border routers, where translation
is to be enforced. If translate is not used on any NSSA border router, one of the ABRs
for that NSSA is elected to perform translation.
Syntax Description
area-identifier
Area identifier.
nosummary
Inter-Area-Prefix LSAs prohibited.
summary
Inter-Area-Prefix LSAs allowed.
cost
Route metric.
translate
Always translate NSSA LSAs to AS-external LSAs.
Default
None.
Usage Guidelines
This command must specify the cost of the default route advertised into
the NSSA.
History
This command was first available in ExtremeXOS 21.1.
Platform Availability
This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, and X695 series switches.
