Virtual Private Routed Network Services
7750 SR OS Services Guide Page 1389
Parameters area-id — The OSPF area ID expressed in dotted decimal notation or as a 32-bit decimal integer.
Values 0.0.0.0 — 255.255.255.255 (dotted decimal)
0 — 4294967295 (decimal integer)
area-range
Syntax area-range ip-prefix/prefix-length [advertise | not-advertise]
no area-range ip-prefix/mask
area-range ipv6-prefix/prefix-length [advertise | not-advertise]
no area-range ip-prefix/mask
Context config>service>vprn>ospf>area
ospf>service>vprn>nssa
config>service>vprn>ospf3>area
Description This command creates ranges of addresses on an Area Border Router (ABR) for the purpose of route
summarization or suppression. When a range is created, the range is configured to be advertised or
not advertised into other areas. Multiple range commands may be used to summarize or hide different
ranges. In the case of overlapping ranges, the most specific range command applies.
ABRs send summary link advertisements to describe routes to other areas. To minimize the number
of advertisements that are flooded, you can summarize a range of IP addresses and send reachability
information about these addresses in an LSA.
The no form of the command deletes the range (non) advertisement.
Default no area-range — No range of addresses are defined.
Special Cases NSSA Context — In the NSSA context, the option specifies that the range applies to external
routes (via type-7 LSAs) learned within the NSSA when the routes are advertised to other areas as
type-5 LSAs.
Area Context — If this command is not entered under the NSSA context, the range applies to
summary LSAs even if the area is an NSSA.
Parameters ipv6-prefix/prefix-length — The IP prefix in dotted decimal notation for the range used by the ABR
to advertise that summarizes the area into another area.
Values ipv6-prefix - x:x:x:x:x:x:x:x (eight 16-bit pieces)
x:x:x:x:x:x:d.d.d.d
- x [0..FFFF]H - d [0..255]D
prefix-length - [0..128]
mask — The subnet mask for the range expressed as a decimal integer mask length or in dotted
decimal notation.
Values 0 — 32 (mask length), 0.0.0.0 — 255.255.255.255 (dotted decimal)
advertise | not-advertise — Specifies whether or not to advertise the summarized range of addresses
into other areas. The advertise keyword indicates the range will be advertised, and the keyword
not-advertise indicates the range will not be advertised.
The default is advertise.
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