D-Link DGS-3312SR [150/290] Interfaces

D-Link DGS-3312SR [150/290] Interfaces
DGS-3312SR Stackable Gigabit Layer 3 Switch
Loading The routers a e information exchange. Routers have link-state request list and a
link-state retransmission e put on the
list. Any update ledged.
Full The adjacency is outers will
have the same link-state
Adjacencies on Point-to-Point
OSPF Routers that are linked using poin
concepts of DR and BDR are unnecessary
OSPF Packet Formats
All OSPF packet types begin with a stand d there are five packet types. The header is described first,
and each packet type is described in a sub
All OSPF packets (except for Hello pack ertisements. Link-State Update packets, for example,
flood advertisements throughout the OSPF
F packet header
Hello packet
ption pa
equest pack
e Update p
Link-State Acknowledg
OSPF Packet Header
Every by a co ary for a
receiving router to determine if the packet ng.
The fo e OSPP packet header is s
re finalizing th
list. Any information that looks incomplete or outdated will b
that is sent will be put on the retransmission list until it gets acknowrequest
now complete. The neighboring routers are fully adjacent. Adjacent r
database.
Interfaces
t-to-point interfaces (such as serial links) will always form adjacencies. The
.
ard 24-byte header an
sequent section.
ets) forward link-state adv
routing domain.
OSP
Database Descri
Link-State R
cket
et
The Link-Stat
acket
ment packet
OSPF packet is preceded mmon 24-byte header. This header contains the information necess
should be accepted for further processi
rmat of th hown below:
OSPF Packet Header
Type
Packet Length
Router ID
Area ID
Checksum
Authentication Type
Authentication
Authentication
Version No.
Figure 5- 19. OSPF Packet Header
Field Description
Version No.
The OSPF version number
Type
The OSPF packet type. The OSPF packet types are as follows:
Type Description
Hello
Database Description
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