Reference Guide

• Priority is a numbered rating 0 to 255. The higher the number, the higher the priority.
• Cost is a numbered rating 1 to 65535. The higher the number, the greater the cost. The cost assigned reflects the
cost should the router fail. When a router fails and the cost is assessed, a new priority number results.
Figure 85. Priority and Cost Examples
OSPF with FTOS
FTOS supports up to 10,000 OSPF routes for OSPFv2. Within that 10,000 routes, you can designate up to 8,000 routes as
external and up to 2,000 as inter/intra area routes.
FTOS version 7.8.1.0 and later supports multiple OSPF processes (OSPF MP) on OSPFv2 only. The Z9000 platform
supports 32 OSPF processes simultaneously.
On OSPFv3, FTOS supports only one process at a time for all platforms.
Prior to FTOS version 7.8.1.0, FTOS supported one OSPFv2 and one OSPFv3 process ID per system. OSPFv2 and OSPFv3
can coexist but you must configure them individually.
FTOS supports stub areas, totally stub (no summary) and not so stubby areas (NSSAs) and supports the following LSAs,
as described earlier.
• Router (type 1)
• Network (type 2)
• Network Summary (type 3)
• AS Boundary (type 4)
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