User manual D-LINK DGS-3627 USER MANUAL

[. . . ] User Manual Product Model: Release 2 DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch ©Copyright 2007. All rights reserved. xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch _____________________________________________________________________________ Information in this document is subject to change without notice. Reproduction in any manner whatsoever without the written permission of D-Link Corporation is strictly forbidden. Trademarks used in this text: D-Link and the D-LINK logo are trademarks of D-Link Corporation; Microsoft and Windows are registered trademarks of Microsoft Corporation. [. . . ] If this field is set to 0, the router is ineligible to become the DR or the BDR. The number of seconds that must pass before declaring a silent router as down. The identity of the DR for this network, in the view of the advertising router. The DR is identified here by its IP interface address on the network. The identity of the Backup Designated Router (BDR) for this network. The BDR is identified here by its IP interface address on the network. This field is set to 0. 0. 0. 0 if there is no BDR. Description The Router IDs of each router from whom valid Hello packets have been seen within the Router Dead Interval on the network. 159 Router Dead Interval Designated Router Backup Designated Router Field Neighbor xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch Database Description Packet Database Description packets are OSPF packet type 2. These packets are exchanged when an adjacency is being initialized. They describe the contents of the topological database. Multiple packets may be used to describe the database. For this purpose, a pollresponse procedure is used. One of the routers is designated to be master, the other a slave. The master seconds Database Description packets (polls) that are acknowledged by Database Description packets sent by the slave (responses). The responses are linked to the polls via the packets' DD sequence numbers. Database Description Packet Version No. 2 Router ID Area ID Checksum Authentication Authentication Packet Length Authentication Type Reserved I M MS Reserved DD Sequence No. Link-State Advertisement Header . . . Options Figure 8- 27. Database Description Packet Field Options I - bit M - bit MS - bit Description The optional capabilities supported by the router. When set to 1, this packet is the first in the sequence of Database Description packets. When set to 1, this indicates that more Database Description packets will follow. When set to 1, this indicates that the router is the master during the Database Exchange process. User to sequence the collection of Database Description Packets. 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