Lenovo ThinkSystem NE2552E, Application Manual

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NE2552E Application Guide for ENOS 8.4
OSPFv2 Implementation in Lenovo ENOS
Lenovo ENOS supports a single instance of OSPF and up to 2K routes on the
network. The following sections describe OSPF implementation in Lenovo ENOS:
 “Configurable Parameters” on page 394
 “Defining Areas” on page 395
 “Interface Cost” on page 397
 “Electing the Designated Router and Backup” on page 397
 “Summarizing Routes” on page 397
 “Default Routes” on page 398
 “Virtual Links” on page 399
 “Router ID” on page 399
 “Authentication” on page 400
Configurable Parameters
In Lenovo ENOS, OSPF parameters can be configured through the Command Line
Interfaces (CLI/ISCLI), Browser ‐ Based Interface (BBI), or through SNMP. For more
information, see “Switch Administration” on page 29 .”
The CLI supports the following parameters: interface output cost, interface
priority, dead and hello intervals, retransmission interval, and interface transmit
delay.
In addition to the preceding parameters, you can specify the following:
 Shortest Path First (SPF) interval—Time interval between successive calculations
of the shortest path tree using the Dijkstra’s algorithm.
 Stub area metric—A stub area can be configured to send a numeric metric value
such that all routes received via that stub area carry the configured metric to
potentially influence routing decisions.
 Default routes—Default routes with weight metrics can be manually injected
into transit areas. This helps establish a preferred route when multiple routing
devices exist between two areas. It also helps route traffic to external networks.
 Passive—When enabled, the interface sends LSAs to upstream devices, but does
not otherwise participate in OSPF protocol exchanges.
 Point ‐ to ‐ Point—For LANs that have only two OSPF routing agents (the
NE2552E and one other device), this option allows the switch to significantly
reduce the amount of routing information it must carry and manage.