OSPF Mobil Uyumlu Accordion Cheat Sheet

OSPF Mobil Uyumlu Accordion Cheat Sheet

BGP Administrative Distance (Preference)

Cisco	20 (eBGP) and 200 (iBGP)
Nokia	170
Huawei	255
Juniper	170

OSPF Router Types

Internal R.: Router in a Single Area
Backbone R.: Routers in Area 0
ABR: Routers connected to multiple areas
ASBR: Routers connected to another Autonomous System

OSPF General

Uses Dijkstra’s SPF Algorithm
Link State Routing Protocol
Classless Routing Protocol
Open and Standard Protocol

OSPF Network Types

Broadcast (Cisco)
NBMA (Nonbroadcast Multi Access)
Point-to-Point (Cisco)
Point-to-Multipoint
Point-to-Multipoint Non Broadcast

OSPF Area Types

Standard Area
Backbone Area (Area 0)
Stub Area
NSSA (Not So Stubby Area)
Totally Stub Area
Totally NSSA

OSPF Routing Table Abbreviations

O	Intra area route
O IA	Inter area route
O E1 / E2	External routes
O N1/N2	NSSA routes
E1	Cost to ASBR + Advertised External Cost
E2	Advertised External Cost

OSPF Multicast Addresses

224.0.0.5	All Routers
224.0.0.6	All DRs

Packet Types

Hello
DBD
LSR
LSU
LSAck

OSPF Tables

Neighbor Table
Topology Table
Routing Table