D-Link DGS-3620-28TC-SI Product Manual - Page 189

xStack® DGS-3620 Series Managed Switch Web UI Reference Guide Network Link Advertisements Link-State Age Options 2 Link-State ID Advertising Router Link-State Sequence Number Link-State Checksum Length Network Mask Attached Router Figure 5-29 Network Link Advertisements Parameter Network Mask Attached Router 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 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. Summary Link Advertisements Link-State Age Options 2 Link-State ID Advertising Router Link-State Sequence Number Link-State Checksum Length TOS Network Mask Metric Figure 5-30 Summary Link Advertisements 179