Dell PowerConnect 6248 User's Guide - Page 661

OSPFv3 Virtual Link Configuration, Link ID, Sequence, Checksum, Options, Rtr Opt.

Page 661 highlights

- Intra-Area-Prefix-LSA • Link ID - The Link State ID identifies the piece of the routing domain that is being described by the advertisement. The value of the LS ID depends on the advertisement's LS type. • Age - The time since the link state advertisement was first originated, in seconds. • Sequence - The sequence number field is a signed 32-bit integer. It is used to detect old and duplicate link state advertisements. The larger the sequence number, the more recent the advertisement. • Checksum - The checksum is used to detect data corruption of an advertisement. This corruption can occur while an advertisement is being flooded, or while it is being held in a router's memory. This field is the checksum of the complete contents of the advertisement, except the LS age field. • Options - The Options field in the link state advertisement header indicates which optional capabilities are associated with the advertisement. The options are: - V6 - When clear, the link is excluded from IPv6 routing calculations. - E - Describes how AS-external-LSAs are flooded - MC - Describes whether IP multicast datagrams are forwarded according to the specifications in - N - Describes how Type-7 LSAs are handled - R - Shows whether the originator is an active router. The R option is the router bit, and when it is clear, routes that pass through the advertising node cannot be computed. - DC - Describes how the system handles demand circuits. • Rtr Opt. - Shows router-specific options. Displaying OSPFv3 Link State Database Using CLI Commands For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide: • OSPFv3 Commands The following table summarizes the equivalent CLI commands for this feature. Table 10-21. OSPFv3 Link State Database Commands CLI Command Description show ipv6 ospf database Displays information about the link state database when OSPFv3 is enabled. show ipv6 ospf database database-summary Displays the number of each type of LSA in the database and the total number of LSAs in the database. OSPFv3 Virtual Link Configuration Use the OSPFv3 Virtual Link Configuration page to define a new or configure an existing virtual link. To display this page, a valid OSPFv3 area must be defined through the OSPFv3 Area Configuration page. Configuring IPv6 661

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Configuring IPv6
661
Intra-Area-Prefix-LSA
Link ID
— The Link State ID identifies the piece of the routing domain that is being described by the
advertisement. The value of the LS ID depends on the advertisement's LS type.
Age
— The time since the link state advertisement was first originated, in seconds.
Sequence
— The sequence number field is a signed 32-bit integer. It is used to detect old and
duplicate link state advertisements. The larger the sequence number, the more recent the
advertisement.
Checksum
— The checksum is used to detect data corruption of an advertisement. This corruption
can occur while an advertisement is being flooded, or while it is being held in a router's memory. This
field is the checksum of the complete contents of the advertisement, except the LS age field.
Options
— The Options field in the link state advertisement header indicates which optional
capabilities are associated with the advertisement. The options are:
V6 — When clear, the link is excluded from IPv6 routing calculations.
E — Describes how AS-external-LSAs are flooded
MC — Describes whether IP multicast datagrams are forwarded according to the specifications in
N — Describes how Type-7 LSAs are handled
R — Shows whether the originator is an active router. The R option is the router bit, and when it is
clear, routes that pass through the advertising node cannot be computed.
DC — Describes how the system handles demand circuits.
Rtr Opt.
— Shows router-specific options.
Displaying OSPFv3 Link State Database Using CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the
CLI Reference Guide
:
OSPFv3 Commands
The following table summarizes the equivalent CLI commands for this feature.
OSPFv3 Virtual Link Configuration
Use the
OSPFv3 Virtual Link Configuration
page to define a new or configure an existing virtual link.
To display this page, a valid OSPFv3 area must be defined through the OSPFv3 Area Configuration page.
Table 10-21.
OSPFv3 Link State Database Commands
CLI Command
Description
show ipv6 ospf database
Displays information about the link state database when OSPFv3 is
enabled.
show ipv6 ospf database database-summary
Displays the number of each type of LSA in the database and the total
number of LSAs in the database.