20.01.2014 Views

Lectures notes for 2010 - KTH

Lectures notes for 2010 - KTH

Lectures notes for 2010 - KTH

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Common header<br />

The 5 types of OSPF packets:<br />

OSPF Packets<br />

0 7 8 15 16 23 24 31<br />

Version Type Message length<br />

Source Router IP Address<br />

Area Identification<br />

Checksum<br />

Authentication type<br />

Figure 5: OSPF Common Header (see Forouzan figure 14.26 pg. 408)<br />

Type<br />

Authentication (64 bits) a<br />

a. Note that the Authentication field is 64 bits, Forouzan figure 14.26 pg. 408 incorrectly shows it as 32 bits.<br />

1 Hello<br />

Description<br />

2 Database Description<br />

3 Link State Request<br />

4 Link State Update<br />

5 Link State Acknowledgment<br />

Maguire OSPF Packets 7: 29 of 70<br />

maguire@kth.se <strong>2010</strong>.03.21 Internetworking/Internetteknik

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!