Brief Overview on Packet Transport Network PTN Presenter

Brief Overview on Packet Transport Network (PTN) Presenter: Er. Subash Chandra Pakhrin (7424) Backbone Transmission Directorate Babarmahal, Kathmandu 9/19/2021 1

What is PTN • PTN is a hybrid technology that supports E 1 + IP services. • It works on the MPLS – TP (Multiprotocol Label Switching – Transport Protocol) • It supports PWE 3 (Pseudo Wire Emulation Edge to Edge Technology) 9/19/2021 2

How is a PTN Hybrid Technology ? 9/19/2021 3

Where does MPLS – TP lie in Open System Interconnect (OSI) Model MPLS – TP lie somewhere in layer 2. 75 In layer 2 we get the essence of VLAN and MAC address 9/19/2021 4

Difference between MSTP and PTN • MSTP (Multiple Switching Transport Protocol) is mainly oriented for TDM • PTN presents advantages when packet service is predominant. 9/19/2021 5

What is MAC address • Media Access Control (MAC) • Its unique identification number for each equipment. • Its 48 bit in length. • Each equipment has unique MAC address 9/19/2021 6

What is VLAN • Virtual LAN • We have 2^12 = 4096 VLANS • Among them we use VLANS from 16 to 4000 other VLANS are used for some special purpose. • Segregation Technique that helps to fragment IP – V 4 address. • Can we purchase some public IP – V 4 address ? ? 9/19/2021 7

Tunnel, Pseudo wire, Ethernet, TDM 9/19/2021 8

Services Provided by PTN • STM 1 Services – In 1 -STM 1 we have 63 E 1. – PTN is so beautiful and so lucid that it uses simple nomenclature in the flipside other equipment uses K – L – M nomenclature. • E 1 Services • IP services – E-Line / VPWS / Point to Point – E – Tree / VPLS / Point to Multipoint 9/19/2021 9

E – Line and E - Tree E – Line 9/19/2021 E - Tree 10

Bandwidth supported by PTN • 10 G optical port for line card (NNI – Network Interface). • 1 G optical port for line / user card (NNI / UNI user network interface). • 100 Mbos Electrical port • 100 Mbps Optical port • STM 1 optical port • E 1 ## STM 4 optical card under test 9/19/2021 11

Any Questions ? We will meet in successive class very soon. Thank You. 9/19/2021 12