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STP SPANNING TREE PROTOCOL, OSPF RUN OVER IP OSPFv2 IPV4 OSPFv3 IPV6…
STP
SPANNING TREE PROTOCOL
ROOT PRIMARY
PRIORITY
DEFAULT:
32768
PORT COST
RELATION PORTCOST/PORTBANDWIDTH
HIGHER PORT smaller port cost
PREFERENCE ROUTING TABLE
10
Disable to Forwarding
30s
Port ID:
length 16bits
Path cost
root bridge 0
OSPF
RUN OVER IP
OSPFv2 IPV4
OSPFv3 IPV6
IGP
Link state routing protocol (LSA Flooding)
steps
establish neihbor relationship-
hello packets change
exhange link state advertisements (LSAs)
Costo - nombre interfaz
NO COMPARTE RUTAS
LSDB
All router interfaces on the network
Description of the entire network topology
-LSDB synchronization
-The two routers establish an ADJACENCY
SPF CALCULATION
Each router calculates a loop-free tree
RIB
Generate Routing Table
Basic OSPF concepts
Area
Logical group, each group is identify by an area ID
Router ID
manual o automatically
Usually is Loopback interface
Cost: Es la suma
Reference 100Mbit/s
Serial 1.544Mbits 64 Cost
FE 100Mbits 1 Cost
GE 1000Mbits 1 Cost
Packet Types
Hello
DD
-Database Description
-Summary local LSDB, used to synchronize LSDB of two devices
Link State Request (LSR)
-Request LSA to the network
-Only after DD successfully exchanged
Link State Update (LSU)
-Se envia para anunciar un LSA al vecino
Link State ACK (LSAck)
-Is used to acknowledge the receipt of an LSA
Tree Types OSPF Entries
Display OSPF peer
Display OSPF lsdb
Display OSPF routing
Message
Init
Packet hello
2-way
Respondiendo paquetes hello
Ex-start
change DD
Exchange
change DD
Loading
LSR
LSU
Full
LSDB synchronized
Multi Access MA
BMA and NBMA networks
typical broadcast multi access network
DR
Can stablish adjacencies
higher ospf priority DR -Default 1
higher ospf router ID is DR
BDR
Can stablish adjacencues
DRother
No stablish adjancecies
Relationship is 2-way
OSPF
Interior gateway protocol
Link state routing protocol (LSA flooding)
DR
BDR
STEPS OSPF
NEIGHBOR RELATIONSHIPS
LSA
LSDB
ROUTE CALCULATION
STATES
2-WAY
FULL
EXCHANGE
EXSTART
MESSAGES
DD
HELLO
TRANSMIT 10s
LSR
LSU
VLANS
TYPE
ACCESS
TRUNK
HYBRID
PVID
PUERTO VLAN ID
VLAN TAG
VLAN BASED ON PORT
AAA
LOCAL
NONE
RADIUS
802.1X
WLAN
SECURITY
WPA2-PSK
WEP
WPA
WPA2-802.1X
FIT AP
ESS
SSID
BSSID
BSS
FILE TRANSFERENCE
PROTOCOL
FTP
TFTP
SFTP
ROOT BRIDGE
ALL PORTS DESIGNATED PORTS
NAT
TYPES
NAPT
BASIC NAT
EASY-IP
STATIC NAT
ACL
TRAFFIC-FILTER
SUBNETING
CANTIDAD DE HOST
/25 126
/26 62
/27 30
/28 14
/29 6
/30 2
TOPOLOGY
START
IPV4
CLASES
A
B
C
SUB.INTERFACES
TTL
Used to prevent infinite loop
Decreases by 1 each time a layer 3 device
Length is 8 bits