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ProSafe M5300 Switch
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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:
• 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.
Field Description