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Figure 92. Priority and Cost Examples
OSPF with the Dell Networking OS
The Dell Networking OS supports up to 16,000 OSPF routes for OSPFv2.
The Dell Networking OS version 7.8.1.0 and later supports multiple OSPF processes (OSPF MP). The FN IOM switch supports
up to 16 processes simultaneously.
On OSPFv3, the system supports only one process at a time for all platforms.
Prior to the Dell Networking OS version 7.8.1.0, the system supported one OSPFv2 and one OSPFv3 process ID per system.
OSPFv2 and OSPFv3 can coexist but you must configure them individually.
The Dell Networking OS 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)
● LSA(type 5)
● External LSA (type 7)
● Link LSA, OSPFv3 only (type 8)
● Opaque Link-Local (type 9)
● Grace LSA, OSPFv3 only (type 11)
Graceful Restart
Graceful restart for OSPFv2 and OSPFv3 are supported in Helper and Restart modes.
When a router goes down without a graceful restart, there is a possibility for loss of access to parts of the network due to
ongoing network topology changes. Additionally, LSA flooding and reconvergence can cause substantial delays. It is, therefore,
desirable that the network maintains a stable topology if it is possible for data flow to continue uninterrupted.
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Open Shortest Path First (OSPFv2 and OSPFv3)