Dd packet – H3C Technologies H3C SR8800 User Manual
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Figure 26 Hello packet format
Major fields:
•
Network mask—Network mask associated with the router’s sending interface. If two routers have
different network masks, they cannot become neighbors.
•
HelloInterval—Interval for sending hello packets. If two routers have different intervals, they cannot
become neighbors.
•
Rtr Pr—Router priority. A value of 0 means the router cannot become the DR/BDR.
•
RouterDeadInterval—Time before declaring a silent router down. If two routers have different dead
intervals, they cannot become neighbors.
•
Designated router—IP address of the DR.
•
Backup designated router—IP address of the BDR.
•
Neighbor—Router ID of the neighbor router.
DD packet
Two routers exchange database description (DD) packets describing their LSDBs for database
synchronization. A DD packet contains only the headers of LSAs to reduce traffic.
- H3C SR6600-X H3C SR6600 H3C WX6000 Series Access Controllers H3C WX5000 Series Access Controllers H3C WX3000 Series Unified Switches H3C LSWM1WCM10 Access Controller Module H3C LSWM1WCM20 Access Controller Module H3C LSQM1WCMB0 Access Controller Module H3C LSRM1WCM2A1 Access Controller Module H3C LSBM1WCM2A0 Access Controller Module