Users Guide

Figure 98. Priority and Cost Examples
OSPF with Dell Networking OS
The Dell Networking OS supports up to 10,000 OSPF routes for OSPFv2. Within the that 10,000 routes, you can designate up to 8,000
routes as external and up to 2,000 as inter/intra area routes.
Dell Networking OS version 9.4(0.0) and later support only one OSPFv2 process per VRF. Dell Networking OS version 9.7(0.0) and later
support OSPFv3 in VRF. Also, on OSPFv3, Dell Networking OS supports only one OSPFv3 process per VRF.
OSPFv2 and OSPFv3 can co-exist but you must configure them individually.
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 on the S4048–ON platform 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.
524
Open Shortest Path First (OSPFv2 and OSPFv3)