702 | Open Shortest Path First (OSPFv2 and OSPFv3)w w w . d e l l . c o m | s u p p o r t . d e l l . c o m Each OSPFv2 process has a unique process ID and must have an associated Router ID. There must be anequal number of interfaces must be in Layer-3 mode for the number of processes created. For example, if 5OSPFv2 processes are created on a system, there must be at least 5 interfaces assigned in Layer-3 mode.Each OSPFv2 process is independent. If one process loses adjancency, the other processes continue tofunction/Processing SNMP and Sending SNMP TrapsThough there are may be several OSPFv2 processes, only one process can process SNMP requests andsend SNMP traps. The mib-binding command identifies one of the OSPVFv2 processes as the processresponsible for SNMP management. If the mib-binding command is not specified, the first OSPFv2 processcreated manages the SNMP processes and traps.RFC-2328 Compliant OSPF FloodingIn OSPF, flooding is the most resource-consuming task. The flooding algorithm described in RFC 2328requires that OSPF flood LSAs on all interfaces, as governed by LSA's flooding scope. (Refer to Section13 of the RFC.) When multiple direct links connect two routers, the RFC 2328 flooding algorithmgenerates significant redundant information across all links.By default, FTOS implements an enhanced flooding procedure which dynamically and intelligently detectswhen to optimize flooding. Wherever possible, the OSPF task attempts to reduce flooding overhead byselectively flooding on a subset of the interfaces between two routers.If RFC 2328 flooding behavior is required, enable it by using the command flood-2328 in ROUTER OSPFmode. When enabled, this command configures FTOS to flood LSAs on all interfaces.Confirm RFC 2328 flooding behavior by using the command debug ip ospf packet and look for outputsimilar to the following:
