Webinar topic: Building Local-loop Services for Customers Presenter: Achmad Mardiansyah In this webinar series, Building Local-loop Services for Customers Please share your feedback or webinar ideas here: http://bit.ly/glcfeedback Check our schedule for future events: https://www.glcnetworks.com/en/schedule/ Follow our social media for updates: Facebook, Instagram, YouTube Channel, and telegram also discord Recording available on Youtube https://youtu.be/FhLjNLrO_tU

1. www.glcnetworks.com
Building local-loop
services for
customers
GLC Webinar,
14 oct 2021
Achmad Mardiansyah
achmad@glcnetworks.com
GLC Networks, Indonesia
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Source: networkencyclopedia.com

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Agenda
● Introduction
● Review prerequisite knowledge
● Local-loop services
● Local-loop technologies
● Live practice
● Q & A
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introduction
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What is GLC?
● Garda Lintas Cakrawala (www.glcnetworks.com)
● Based in Bandung, Indonesia
● Areas: Training, IT Consulting
● Certified partner for: Mikrotik, Ubiquity, Linux foundation
● Product: GLC radius manager
● Regular event
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Trainer Introduction
● Name: Achmad Mardiansyah
● Base: bandung, Indonesia
● Linux user since 1999, mikrotik user since 2007, UBNT
2011
● Mikrotik Certified Trainer
(MTCNA/RE/WE/UME/INE/TCE/IPv6)
● Mikrotik/Linux Certified Consultant
● Website contributor: achmadjournal.com, mikrotik.tips,
asysadmin.tips
● More info:
http://au.linkedin.com/in/achmadmardiansyah
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Past experience
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● 2021 (Congo DRC, Malaysia): network support,
radius/billing integration
● 2020 (Congo DRC, Malaysia): IOT integration,
network automation
● 2019, Congo (DRC): build a wireless ISP from
ground-up
● 2018, Malaysia: network revamp, develop billing
solution and integration, setup dynamic routing
● 2017, Libya (north africa): remote wireless migration
for a new Wireless ISP
● 2016, United Kingdom: workshop for wireless ISP,
migrating a bridged to routed network

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About GLC webinar?
● First webinar: january 1, 2010 (title:
tahun baru bersama solaris - new year
with solaris OS)
● As a sharing event with various topics:
linux, networking, wireless, database,
programming, etc
● Regular schedule
● Irregular schedule: as needed
● Checking schedule:
http://www.glcnetworks.com/schedule
● You are invited to be a presenter
○ No need to be an expert
○ This is a forum for sharing: knowledge,
experiences, information
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Please introduce yourself
● Your name
● Your company/university?
● Your networking experience?
● Your mikrotik experience?
● Your expectation from this course?
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Prerequisite
● This presentation some prerequisite knowledge
● We assume you already understand:
○ How computer network works
○ Telecommunication network
○ ISP network
○ Encapsulation process
○
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Review prerequisite knowledge
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Telecommunication networks
● Service:
○ Voice
○ Voice-related:
■ Hunting
■ Callcenter
■ voicemail
● Nodes:
○ Customer Premise Equipment (CPE)
○ Central office (CO / Exchange / switch)
○ Access network (CO - CPE)
■ Local-loop: the 2-wire cable
Why is it called local-loop?
○ Core network (between CO)
■ Trunk
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Source: networkencyclopedia.com

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Telecommunication call-flow
● Circuit based (not packets)
○ Data (Voice) circuit
■ Analog signal (in old telco)
■ Digital signal (in ISDN / voip-based)
○ Signalling circuit
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CORE NETWORK
ACCESS
NETWORK
(local-loop)
ACCESS
NETWORK
(local loop)
CO1
CO2
CO3

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Local-loop in telco
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Local-loop technologies
● Copper wire
● ISDN (integrated service digital network)
● ADSL (asynchronous digital subscriber line)
○ Splitting data and voice
● GPON (gigabit passive optical network)
● etc.
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CORE NETWORK
ACCESS
NETWORK
(local-loop)
ACCESS
NETWORK
(local loop)
CO1
CO2
CO3

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Local-loop service
● Lease line
● Connection between sites
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CORE NETWORK
ACCESS
NETWORK
(local-loop)
ACCESS
NETWORK
(local loop)
CO1
CO2
CO3

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Local-loop in ISP
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Inter-connected networks
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Source: APNIC

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Your ISP and you
● ISP is an organisation that is part of internet that provides connectivity to their
customers
○ Identified by their AS (Autonomous System) number
○ Identified by their IP address block
● When you connect to internet, you will use your ISP’s address
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Your ISP. and you
are part of them
other
ISP
other
ISP
google
facebook

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At your ISP (physical topology)
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Border
router
Other
ISP
Other
ISP
Access
router
Access
router
customer customer customer
Access network: GPON, WLAN,
FO, GSM, ethernet, etc

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Local-loop service in ISP
Purpose
● Site-to-site connectivity
● site-to-IXP
● site-to-wherever
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Local-loop technologies
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Local-loop technologies
●
● Layer-2 service
○ Tunnel
■ EOIP
○ Virtual Private LAN Service - VPLS
(MPLS tunnel)
○ VPLS (BGP based)
● Layer-3 service
○ Virtual Routing and Forwarding (VRF)
○ L3VPN (BGP-MPLS)
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Example L2 local-loop
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C2
Site 3
Example L3 local-loop
PE
PE PE
CE
CE
CE
CE
CE
C1
Site 3
C1
Site 2
C1
Site 1
C2
Site 1
C2
Site 2
RR
BGP
OSPF as CE-PE

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LIVE practice
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preparation
● SSH client
● SSH parameters
○ SSH address
○ SSH port
○ SSH username
○ SSH password
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Q & A
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Interested? Just come to our training...
● Topics are arranged in systematic and logical way
● You will learn from experienced teacher
● Not only learn the materials, but also sharing experiences, best-practices, and
networking
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End of slides
● Thank you for your attention
● Please submit your feedback: http://bit.ly/glcfeedback
● Find our further event on our website : https://www.glcnetworks.com/en/
● Like our facebook page: https://www.facebook.com/glcnetworks
● Slide: https://www.slideshare.net/glcnetworks/
● Discord (bahasa indonesia): (https://discord.gg/6MZ3KUHHBX)
● Recording (youtube): https://www.youtube.com/c/GLCNetworks
● Stay tune with our schedule
● Any questions?
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