Tips - IPV4/IPV6

Acordarse de esto no viene mal.

Mascaras de Subred IPV4
Subnet_____________Host_______Hosts Utiles
/24 => 255.255.255.0 => 256 -2 => 254
/25 => 255.255.255.128 => 128 -2 => 126
/26 => 255.255.255.192 => 64 -2 => 62
/27 => 255.255.255.224 => 32 -2 => 30
/28 => 255.255.255.240 => 16 -2 => 14
/29 => 255.255.255.248 => 8 -2 => 6
/30 => 255.255.255.252 => 4 -2 => 2

Direcciones Multicast conocidas. (El rango 224.0.0.0/24 está reservado para tareas de administración)

IPV4
224.0.0.1 Todos los hosts en una subred
224.0.0.2 Todos los routers en una subred
224.0.0.4 Distance Vector Multicast Routing Protocols (DVMRP)
224.0.0.5 Todos los routers OSPF (DRothers)
224.0.0.6 Todos los routers designados OSPF (DR)
224.0.0.9 Routers RIP y RIPng
224.0.0.10 Routers EIGRP
224.0.0.13 Routers PIM (Protocol independent Multicast)

IPV6

Fixed Scope Multicast 
1. Interface-Local 
a. ff01::1 - All Node-Local Nodes
b. ff01::2 - All Node-Local Routers
2. Link-Local
a. ff02::1 - All Link-Local Nodes
b. ff02::2 - All Link-Local Routers
c. ff02::3 - Unassigned
d. ff02::4 - Link-Local DVMRP Routers
e. ff02::5 - Link-Local OSPFIGP
f. ff02::6 - Link-Local OSPFIGP Designated Route
g. ff02::7 - Link-Local ST Routers
h. ff02::8 - Link-Local ST Hosts (IS-IS)
i. ff02::9 - Link-Local RIP Routers
j. ff02::A - Link-Local EIGRP Routers
k. ff02::B - Link-Local Mobile-Agents
l. ff02::D - All Link-Local PIM Routers
m. ff02::E - Link-Local RSVP-ENCAPSULATION
n. ff02::16 – All MLDv2-capable routers
o. ff02::6A – All Snoopers
p. ff02::1:1 - Link-Local Link Name
q. ff02::1:2 - Link-Local All-dhcp-agents
r. ff02::1:FFXX:XXXX - Link-Local Solicited-Node address

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