Use the IPv6_RANGE statements to ad ranges to IPv6 OSPF areas. External to the area, a single route is advertised for each address range. For example, if an IPv6 OSPF area were to consist of the prefix 2001:0db8:1:2::/64, all addresses falling within that prefix would be defined as consisting of a single address range. The address range would be specified as an address of 2001:0db8:1:2:: together with a prefix length of 64. Outside of the area, all addresses that fall within that prefix would be advertised as a single route to prefix 2001:0db8:1:2::/64.
Ranges can be defined to control which routes are advertised external to an area.
There are two choices:
- When IPv6 OSPF is configured to advertise the range, a single interarea route is advertised for the range if at least one component route of the range is active within the area.
- When IPv6 OSPF is configured not to advertise the range, no interarea prefix routes are advertised for routes that fall within the range. Ranges cannot be used for areas that serve as transit areas for virtual links. Also, when ranges are defined for an area, IPv6 OSPF does not function correctly if the area is partitioned but is connected by the backbone.
Ranges cannot be used for areas that serve as transit areas for virtual links. Also, when ranges are defined for an area, OSPF does not function correctly if the area is partitioned but is connected by the backbone.
Syntax
>>-IPv6_Range--Prefix--=--prefix/prefixlen----------------------> .-Area_Number=0.0.0.0--. .-Advertise=YES-------. >--+----------------------+--+---------------------+----------->< '-Area_Number--=--area-' '-Advertise--=--value-'
Parameters
- Prefix
- Common prefix of IP addresses in this range, with the prefix length.
- Area_Number
- Area number for which to add this range. Valid values are any defined areas.
- Advertise
- Determines whether this range is advertised to other areas. Valid values are YES or NO.