User Manual

OSPF and OSPFv3
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M6100, M5300, and M7100 Series Managed Switches
The following table describes the nonconfigurable data that is displayed in the External Link
State Database (LSDB) table.
Options The Options field in the link state advertisement header indicates which
optional capabilities are associated with the advertisement. The options
are as follows:
• Q. This enables support for QoS traffic engineering.
• E. This describes the way AS-external LSAs are flooded.
• MC. This describes the way IP multicast datagrams are forwarded
according to the standard specifications.
• O. This describes whether opaque LSAs are supported.
• V. This describes whether OSPF++ extensions for VPN/COS are
supported.
Router Options The router-specific options.
Table 165. Advanced OSPFv3 External Link State Database Table
Field Description
Router ID The 32-bit integer in dotted-decimal format that uniquely identifies the
router within the autonomous system (AS). The router ID is set on the
OSPFv3 Configuration screen. To change the router ID you must first
disable OSPFv3. After you set the new router ID, you must reenable
OSPFv3 for the change to take effect. The default value is 0.0.0.0,
although this is not a valid router ID.
LSA Type The format and function of the link state advertisement. LSA Type is
one of the following:
• Router LSA. A router can originate one or more router LSAs for a
given area. Each router LSA originated in an area describes the
collected states of all the router's interfaces to the area.
• Network LSA. A network LSA is originated for every link having
two or more attached routers, by the designated router. It lists all
the routers attached to the link.
• Inter-Area Router LSA. This type describes a prefix external to
the area, yet internal to the autonomous system. It is originated by
an area border router.
• AS-External LSA. This LSA type describes a path to a prefix
external to the autonomous system and is originated by an
autonomous system border router.
• Link LSA. A router originates a separate link LSA for each
attached link. It provides router's link local address to routers
attached to the link and also inform them of a list of IPv6 prefixes to
associate with the link.
• Intra-Area-Prefix LSA. A link's designated router originates one or
more intraarea-prefix LSAs to advertise the link's prefixes
throughout the area. A router can originate multiple
intra-area-prefix LSAs for a given area to advertise its own prefixes
and those of its attached stub links.
Table 164. Advanced OSPFv3 Link State Database (continued)
Field Description