Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 667

Multi-Process OSPF (OSPFv2, IPv4 only) c e s Multi-Process OSPF is supported on platforms and with FTOS version 7.8.1.0 and later, and is supported on OSPFv2 with IPv4 only. Multi-Process OSPF allows multiple OSPFv2 processes on a single router. Multiple OSPFv2 processes allow for isolating routing domains, supporting multiple route policies and priorities in different domains, and creating smaller domains for easier management. • The E-Series supports up to 28 OSPFv2 processes. • The C-Series supports up to 6 OSPFv2 processes. • The S50 and S25 support up to 4 OSPFv2 processes. • The S55, S60, and S4810 support up to 16 OSPFv2 processes. • The Z9000 supports up to 16 OSPFv2 processes. Each OSPFv2 process has a unique process ID and must have an associated Router ID. There must be an equal number of interfaces must be in Layer-3 mode for the number of processes created. For example, if 5 OSPFv2 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 to function/ Processing SNMP and Sending SNMP Traps Though there are may be several OSPFv2 processes, only one process can process SNMP requests and send SNMP traps. The mib-binding command identifies one of the OSPVFv2 processes as the process responsible for SNMP management. If the mib-binding command is not specified, the first OSPFv2 process created manages the SNMP processes and traps. RFC-2328 Compliant OSPF Flooding In OSPF, flooding is the most resource-consuming task. The flooding algorithm described in RFC 2328 requires that OSPF flood LSAs on all interfaces, as governed by LSA's flooding scope. (Refer to Section 13 of the RFC.) When multiple direct links connect two routers, the RFC 2328 flooding algorithm generates significant redundant information across all links. By default, FTOS implements an enhanced flooding procedure which dynamically and intelligently detects when to optimize flooding. Wherever possible, the OSPF task attempts to reduce flooding overhead by selectively 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 OSPF mode. When enabled, this command configures FTOS to flood LSAs on all interfaces. Open Shortest Path First (OSPFv2 and OSPFv3) | 667