Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

Read offline with no ads or diagram watermarks!
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
      9  TCP/IP Internet Layer (OSI Network Layer) Protocols
           9  Internet Control Message Protocol (ICMP/ICMPv4 and ICMPv6)
                9  ICMP Message Types and Formats
                     9  ICMP Version 6 (ICMPv6) Informational Message Types and Formats

Previous Topic/Section
ICMPv6 Router Renumbering Messages
Previous Page
Pages in Current Topic/Section
12345
6
Next Page
TCP/IP IPv6 Neighbor Discovery Protocol (ND)
Next Topic/Section

ICMPv6 Informational Message Options
(Page 6 of 6)

MTU Option Format

The MTU option lets a router convey a recommended MTU value in Router Advertisement messages. Its format is described in Table 119 and Figure 168.


Table 119: ICMPv6 MTU Option Format

Field Name

Size (bytes)

Description

Type

1

Type: Identifies the ICMPv6 option type. For the MTU option, the value is 5.

Length

1

Length: The length of the entire option (including the Type and Length fields), expressed in units of 8 octets (64 bits). The MTU option is fixed in length at 8 bytes so the value of this field is 1.

Reserved

2

Reserved: 2 reserved bytes sent as zeroes.

MTU

4

MTU: The maximum transmission unit (MTU) value, in bytes, that the router is recommending for use on the local link.



Figure 168: ICMPv6 MTU Option Format

 


 


Previous Topic/Section
ICMPv6 Router Renumbering Messages
Previous Page
Pages in Current Topic/Section
12345
6
Next Page
TCP/IP IPv6 Neighbor Discovery Protocol (ND)
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

© Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.