Nortel Web OS 10.0, Application Manual

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Web OS 10.0 Application Guide
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Chapter 4: OSPF
212777-A, February 2002
OSPF Implementation in Web OS
Web OS 10.0 supports a single instance of OSPF and up to 1K routes on the network. The fol-
lowing sections describe OSPF implementation in Web OS:
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“Configurable Parameters” on page 74
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“Defining Areas” on page 75
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“Interface Cost” on page 77
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“Electing the Designated Router and Backup” on page 77
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“Summarizing Routes” on page 77
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“Default Routes” on page 78
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“Virtual Links” on page 79
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“Router ID” on page 80
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“Authentication” on page 80
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“Host Routes for Load Balancing” on page 82
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“OSPF Features Not Supported in This Release” on page 82
Configurable Parameters
In Web OS 10.0, OSPF parameters can be configured through the Command Line Interface
(CLI), Web OS Browser-Based Interface (BBI) for Alteon AD4 and 184 switches, or through
SNMP.
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 above parameters, you can also specify the following:
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Shortest Path First (SPF) interval—Time interval between successive calculations of the
shortest path tree using the Dijkstra’s algorithm.
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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.
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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.