Technical Models of NAPs
PTTMetro Project
Milton Kaoru KashiwakuraPTTMetro Technical Coordinator
NAPLA 2005 – Lima / Peru
PTTMetro Project
● PTTMetro is a Brazilian Internet Steering Committee project (CGI.br).
● Provide NAP facility in metropolitan regions with ISPs interested in Internet traffic exchange
● Mains advantages :– Cost Reduction– Performance improvement– Gain more control over their routing
PTTMetro Project● PTTMetro implementation characteristics :
– Neutral– Quality– Reduced cost alternative with high availability for ISP– One traffic exchange matrix per metropolitan region
● Locations:– São Paulo – Brasília– Rio de Janeiro– Others 9 places to be defined
PTTMetro - São Paulo● Connect all NAP together in the
unique infrastructure using dark fiber
● Layer 2 switched Ethernet architecture
● VLAN (IPv4, IPv6, Multicast, ...)● Private AS (AS64512 to AS65535)
for routers servers and looking glass● INOC-DBA – Inter-Network
Operations Center Dial-By-ASN (http://www.pch.net/inoc-dba/
PTTMetro São Paulo
PTTMetro São Paulo
Vlan Management(Tag 99) Vlan IPv4 (Tag 10)Vlan Public (Tag 40) Vlan IPv6 (Tag 20)
PIX-USP
PIX-MetroredPIX- Others PIX-Central
PIX-Optiglobe
Route Server 2
Route Server 1
Looking Glass Site/Management
Others services
● Root-Server F Mirror using IPv4 hierarchical anycast technique
● AS112 Project (http://www.as112.net)
Joining requirements● ASN (Autonomous System Number) ● BGP-4 (Border Gateway Protocol Version 4) ● Needs to sign a connection agreement (“Termo de Conexão
ao PTTMetro”).● Needs to make bilateral or multilateral peering agreements
with ISPs connected to the PTTMetro.● Connection in one PIX per location.● Broadcast traffic limited to ARP resolution● Default route to an ISP only if authorized by it.● If announce IP prefixes related to other AS connected to
PTTMetro it needs to be marked with NEXT_HOP_SELF
Fee Model
Cross- connect
PTTMetro
SDH, PDH, FR, etc.
DGO
Switch L2
1 2 3 4
Redundancyphysical and 'genetic' redundancy by using switches from two or more vendors
PIX-USP
PIX-MetroredPIX- Others
PIX-Central
PIX-Optiglobe
Duplex System
Obrigado !Thank You !Muchas Gracias!
Site :http://ptt.br