MPLS - LDP

 

 LDP

LDP Discovery

• Basic discovery
• Extended discovery

Basic Discovery

• It is used to discover directly connected LSR neighbors.
• LSR send hello messages as UDP packets to all routers on this subnet using destination IP address as 224.0.0.2 to discover neighbor.
• Hello Message has LDP Identifier is 6 Byte (4 Byte Router ID + 2 Byte Label space).
• 4 Byte Router ID is configurable - By Default, RID is Highest Loopback interface or  active interface (if no loopback interface configured)