Appendix D. Memory Tables

Chapter 1

Table 1-2 IP Protocol Numbers

Protocol Number

IP Protocol

1

Internet Control Message Protocol (ICMP)

2

Internet Group Management Protocol (IGMP)

6

 

 

User Datagram Protocol (UDP)

 

IPv6 encapsulation

50

 

51

 

 

ICMPv6

 

 

89

Open Shortest Path First (OSPF)

103

 

 

Virtual Router Redundancy Protocol (VRRP)

Table 1-3 IPv4 Header Fields

Field

Length

Description

 

4 bits

Indicates the IP header’s format, based on the version number. Set to 0100 for IPv4.

IHL

 

 

 

 

QoS parameters.

Total Length

 

Length of the packet, in bytes, including header and data.

Identification

16 bits

Identifies a fragment.

 

3 bits

 

Fragment Offset

13 bits

 

 

8 bits

Decremented ...

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