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WAN Connectivity Options (Private Lines (ISDN, Frame Relay, Dialup, ATM,…
WAN Connectivity Options
DMVPN
Protocols Employed
NHRP
mGRE
IPsec
Simplifies VPN Implementation
Layer-2 VPN
Layer-2 Mechanism is Used for the Transportation of Traffic
Implementation Models
VPLS
VPWS
MPLS Layer-3 VPN
Use Layer-3 as a WAN Transport Mechanism
Protocols Deployed
MPLS
IGP
MP-BGP
Routing Protocol at CE
IPsec
Inter-operable and Secure IP Traffic Transmission
Modes of Operation
Tunnel Mode
Transport Mode
Security Protocols
ESP
AH
IKE
GRE
Supports IP broadcast, IP Multicast and Non-IP Protocols
GRE Packet is created by encapsulating original data
Actual data is called as "Payload" or "Inner Packet"
Insecure Transmission of Data
Private Lines
ISDN
Frame Relay
Dialup
ATM
Leased Lines
Ethernet