D-Link DGS-3620-52P Reference Manual page 180

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xStack DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch Web UI Reference Guide
Version No.
Parameter
Network Mask
Options
Hello Interval
Router Priority
Router Dead Interval
Designated Router
Backup Designated
Router
Neighbor
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 poll-response 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.
Hello Packet
1
Checksum
Hello Interval
Router Dead Interval
Designated Router
Backup Designated Router
Figure 5-22 Hello Packet
Description
The network mask associated with this interface.
The optional capabilities supported by the router.
The number of seconds between this router's Hello packets.
This router's Router Priority. The Router Priority is used in the election of the DR and
BDR. 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.
The Router IDs of each router from whom valid Hello packets have been seen within
the Router Dead Interval on the network.
Packet Length
Router ID
Area ID
Authentication Type
Authentication
Authentication
Network Mask
Options
Neighbor
170
Router Priority