IPv4 and IPv6 – most boring topic ever

Unicast Multiccast Broadcast

one to one, one to many, one to all

VLSM – variable length subnet mask for different subnets

Supported Routing Protocol EIGRP OSPF RIPv2 BGP ISIS

RIPv1 and IGRP does not


ARP: Protocol used to discover mac address to IP address mappings

DHCP: Discover Offer Request ACK


IPv6 Addressing

Golobal Unicast – 2000::/3

48 16 subnet prefix

64 bits host address

Router 1

config t

ipv6 unicast-routing

int f0/0

ipv6 address 2001::1/64

int f1/1

ipv6 address 2001:1::1/64


ipv6 route 2001:2::/64 2001::2

do show ipv6 int brief (to verify)


Router 2

config t

ipv6 unicast-routing

int f0/0

ipv6 address 2001::1/64


ipv6 route 2001:1::/64


[pc1] — [r1]—–[r2]–[pc2]

ping pc1 from pc2

can ping


eui 64 generated host address based on MAC address value

if you enable ipv6 on router link local address will be generated.


layer 2 addressing

ipv6 nd neighbor discovery

host to host

message sent to a remote host asking for link layer address is neighbor advertisement

host to router

host router solicitation rs message sent to discover routers on local link

router advertisement message to a router solicitation with network router information

ipv6 dhcp

stateful or stateless dhcp


solicit advertise request reply

stateless slaac host use icmpv6 message to discover prefix info

router solicitation router advertisement



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