Allied Telesis AT-9900 用户手册
94
Open Shortest Path First Enhancements
Release Note
Software Version 2.8.1
C613-10477-00 REV B
C613-10477-00 REV B
Command Reference Updates
This section describes each new command and the changed portions of
modified commands and output screens. For modified commands and output,
the new parameters, options, and fields are shown in bold.
modified commands and output screens. For modified commands and output,
the new parameters, options, and fields are shown in bold.
add ospf area
Syntax
ADD OSPF AREa={BAckbone|area-number}
[AUthentication={NONE|PASSword|MD5}]
[NSSAStability=1..3600]
[NSSATranslator={CANdidate|ALWays}]
[STUBArea={ON|OFF|YES|NO|NSSA|True|False}]
[STUBMetric=0..16777215]
[SUMmary={SENd|NONE|OFF|NO|False}]
where area-number is a 4-byte OSPF area number in dotted decimal notation
Description
The new nssatranslator parameter sets the NSSA translator role when the
router or switch is acting as an NSSA border router. If you specify always, the
router or switch will always translate Type-7 LSAs to Type-5 LSAs, regardless
of the translator state of other border routers in the NSSA, as long as it retains
border router status. If it loses border router status it will stop translating
Type-7 LSAs until it regains border router status. If you specify candidate, the
router or switch will participate in the NSSA translator election process. The
NSSA border router with the highest router identifier is elected as the
translator. Once elected, the router or switch will translate Type-7 LSAs until it
loses border router status or another NSSA border router with a higher router
identifier is elected as the translator. The default is candidate. If the router or
switch is acting as a translator it will set the Nt bit in router LSAs it originates
into the NSSA. The nssatranslator parameter is only valid when stubarea is set
to nssa.
router or switch is acting as an NSSA border router. If you specify always, the
router or switch will always translate Type-7 LSAs to Type-5 LSAs, regardless
of the translator state of other border routers in the NSSA, as long as it retains
border router status. If it loses border router status it will stop translating
Type-7 LSAs until it regains border router status. If you specify candidate, the
router or switch will participate in the NSSA translator election process. The
NSSA border router with the highest router identifier is elected as the
translator. Once elected, the router or switch will translate Type-7 LSAs until it
loses border router status or another NSSA border router with a higher router
identifier is elected as the translator. The default is candidate. If the router or
switch is acting as a translator it will set the Nt bit in router LSAs it originates
into the NSSA. The nssatranslator parameter is only valid when stubarea is set
to nssa.
The new nssastability parameter specifies the additional time, in seconds, that
the router or switch will continue to translate Type-7 LSAs after losing the
translator role. An elected translator loses its translator role when another
NSSA border router with a higher router identifier is elected as translator, or an
NSSA router configured to always translate gains border router status. The
time interval allows for a more stable transition to the newly elected translator
and minimises excessive flushing of translated Type-7 LSAs. The default is 40.
The nssastability parameter is only valid when stubarea is set to nssa and
nssatranslator
the router or switch will continue to translate Type-7 LSAs after losing the
translator role. An elected translator loses its translator role when another
NSSA border router with a higher router identifier is elected as translator, or an
NSSA router configured to always translate gains border router status. The
time interval allows for a more stable transition to the newly elected translator
and minimises excessive flushing of translated Type-7 LSAs. The default is 40.
The nssastability parameter is only valid when stubarea is set to nssa and
nssatranslator
is set to candidate.