Dell PowerConnect M6220 User's Guide - Page 487
Virtual Link Configuration, This enables support for QoS Traffic Engineering.
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• LS 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. Possible values 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. Virtual Link Configuration Use the Virtual Link Configuration page to create or configure virtual interface information for a specific area and neighbor. A valid OSPF area must be configured before this page can be displayed. To display the page, click Routing > OSPF > Virtual Link Configuration in the tree view. Configuring Routing 485