D-Link xStack Reference Manual page 221

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
Parameter
Network Mask
Attached Router
Summary Link Advertisements
Summary link advertisements are Type 3 and 4 link state advertisements. These advertisements are originated by
Area Border routers. A separate summary link advertisement is made for each destination known to the router that
belongs to the Autonomous System (AS), yet is outside the area.
Type 3 link state advertisements are used when the destination is an IP network. In this case, the advertisement's
Link State ID field is an IP network number. When the destination is an AS boundary router, a Type 4
advertisement is used, and the Link State ID field is the AS boundary router's OSPF Router ID. Other that the
difference in the Link State ID field, the format of Type 3 and 4 link state advertisements are identical.
Network Link Advertisements
Link-State Age
Link-State Sequence Number
Link-State Checksum
Attached Router
Figure 6-37 Network Link Advertisements
Description
The IP address mask for the network.
The Router IDs of each of the routers attached to the network. Only those routers that are
fully adjacent to the Designated Router (DR) are listed. The DR includes itself in this list.
Summary Link Advertisements
Link-State Age
Link-State Sequence Number
Link-State Checksum
TOS
Figure 6-38 Summary Link Advertisements
Options
Link-State ID
Advertising Router
Network Mask
Options
Link-State ID
Advertising Router
Network Mask
Metric
220
2
Length
2
Length