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Data Communication Business GroupChunghwa Telecom
September, 2002
Status Report of TWIX(TaiWan Internet eXchange)
Speaker: Eugene L. Chang
TWIX Network Architecture
TWIX Components
General Requirements for Participants Installation Procedures and access stats TWIX Members TWIX Traffics
OAM (Operation and Maintenance) of TWIX
TWIX Services (Provisions, Facilities, Maintenance)
Current IX Issues in Taiwan
TaiWan Internet eXchange (TWIX)
TWIX Futures
Agenda
TWIX Private Peering
TWIX Public Peering
A Quick View of IX’s in Taiwan
A Quick View of IX’s in Taiwan
A Quick View of IX’s in Taiwan
3 Major IX centers in Taiwan: TWIX (TaiWan Internet eXchange) TPIX (TaiPei Internet eXchange) TWNAP (TaiWan Network Access Point)
Number of IX members: TWIX :38 TPIX : 13 TWNAP : 16
Aggregated Traffics: TWIX : max/avg = 1400/1100 Mbps TPIX : max/avg = 90/ 60 Mbps TWNAP : (unknown)
OAM of TWIXOAM of TWIX
Enabling ISPs in Taiwan to exchange traffics in a secure and reliable way through the deployment of the scalable interconnection system.
Service provided since November 21, 1997.
Provides Multi-Lateral Peering (MLP) and Bi-Lateral Peering (BLP)
Members exchange route updates and extended attributes conforming to BGP4 (RFC-1771).
OAM of TWIX (cont’d)
OAM of TWIX (cont’d)
Each route updates are reflected to 2 route servers (route reflectors).
Every member who joined MLP agrees to the interconnect/provisioning policies enlisted by TWIX.
TWIXRoute ReflectorRouter (Primary)
CSU/DSU
ISPColocated
Router
DS1,DS3,orSTM-1
CSU/DSU
ISP
CSU/DSU
ISPColocated
Router
DS1,DS3,orSTM-1
CSU/DSU
ISP
CSU/DSU
ISPColocated
Router
DS1,DS3,orSTM-1
CSU/DSU
ISP
EthernetSwitch
TWIXRoute Reflector
Router (Secondary)
CrossConnectFE,1/ 3GE,or GE FE,1/ 3GE,or GE FE,1/ 3GE,or GE
EthernetSwitch
TWIX ArchitectureTWIX Architecture
TWIX Public PeeringTWIX Public Peering
HiNet
ISP 1Colocated
Border Router
ISP NColocated
Border Router
Ethernet Switch
Ethernet Switch
Route ReflectorRouter (Primary)
Route ReflectorRouter (Secondary)
Link for Public Peering
ISP 2Colocated
Border Router
TWIX Private Peering
TWIX Private Peering
HiNet
ISP 1 Colocated Border Router
Public Peering
Private Peering Between
HiNet and ISP 1 (A layer-1/2
Cross-connect)
TWIX ComponentsTWIX Components(1) Ethernet Switch (E/S)
Catalyst 6500’s Provides 10/100/1000 Mbps access. Peering members are asked to colocate members’ own border routers in TWIX.
(2) Routing Reflector (RR) Cisco 3640’s (Primary + Secondary) Supports:
RFC 1966: BGP Route Reflection: An Alternative to Full-Mesh IBGP RFC 1997: BGP Communities Attribute
Public peering members can only send/receive updates/ advertisements via RRs.
Route dampening.
(3) Network Management System (NMS) : Real-time management of the facilities. Logging of inactive/flapped neighbors. Abnormal behaviors detection (e.g. excessive prefixes)
TWIX Components (cont’d)
TWIX Components (cont’d)
(4) Web server : Used as troubleshooting interface for all TWIX members. System maintenance and/or other important messages a
re posted. Periodic traffic-monitoring for each IX port from the mem
bers. TWIX members can check traffic utilization through secur
e logon. Looking-glass webpage helps to isolate/workout the trou
bles.
TWIX ServicesTWIX Services
I. Provisioning
1. Dedicated account manager and implement engineer are assigned in charge of consulting and interconnection issues before the installation to shorten the provision lead-time.
2. After TWIX members colocate their equipments (i.e. border routers) in TWIX, the TWIX staff will complete the necessary configuration and cabling tasks regarding to the peering (either public peering or cross-connect) in less than two working days.
TWIX ServicesTWIX ServicesII. Facility
1. Electricity and Air Condition Equipped with AC UPS power supply. Diesel-powered generators are used for backup. Monitoring of temperature/humidity in TWIX.
2. Security on the room access TWIX is in 24-hour security surveillance and monitoring. Two-level of entrance controls. Other necessary measures from disastrous accidents. (e.g. fire)
3. Networking Hardware Central equipments are all designed and implemented with
redundancy.
TWIX ServicesTWIX Services
III. Maintenance
1. Call for Troubleshooting Provides 7x24 troubleshooting and help-desk. Helps to identify and coordinate the personnel needed to workout the
outages.
2. Technical Consulting Features with qualified technical staff to co-work with the members. Consulting services are provided in pre-/post-installation phases.
3. Information The TWIX website (www.twix.net.tw) provides the traffic statistics, me
mber list, contact personnel, system announcements, etc.
TWIX ServicesTWIX Services
III. Maintenance (continued)
4. Useful Tools TWIX provides looking-glass path verification mechanism to eas
e the tasks of troubles isolation. Functions include: (a) show ip bgp (b) show ip bgp summary (c) show ip bgp dampened-paths (d) show ip bgp flap-statistics (e) ping (f) trace
General Requirements for Participants
General Requirements for Participants
The following requirements apply to candidate who apply forjoining TWIX as a member to peering with other members :
1a. The candidate must have the type-II license, granted by Directorate General of Telecommunications (DGT) of the Ministry of Transportation and Communications (MOTC).
1b. For the non-profit/experimental candidate, the special-permission paper, issued by MOTC, is required.
2. Candidate must have legal AS number and IP prefixes assigned directly from the NIC.
3. When TWIX has scaled to multiple locations, candidate apply for multi-homed interconnection to TWIX should never detour the intra-AS traffics via TWIX.
Installation ProceduresInstallation Procedures
After candidate’s request is admitted, the following technical requirements must be met to fulfill the installation procedures:
1. Peering members can apply for DS1, DS3, STM-1 or STM-4 leased line connecting to members’ border router in TWIX.
2. TWIX provides the access port on Ethernet Switch, from which connecting to members’ border routers.
3. The access speed can be 10 Mbps, 100 Mbps, 1/3 Gigabit-ethernet (333 Mbps) or full GE speed.
4. The routing protocol must comply to BGP version-4 (RFC-1771), in together with the basic functions/features.
STM-42% STM-1
30%
T356%
T112%
• DS1 : 8
• DS3 : 37
• STM-1 : 20
Most Participants apply DS3 circuits (or above) to TWIX, up to 88%.
The Number of Circuits Terminated: 66
TWIX Access StatsTWIX Access Stats
• STM-4 : 1
HiNet(3462) TWNAP(7655) GCNet(4662) PCSNet(17422)
Gamania(7532) AsiaInfra(17502) TTN(7541) TFN(9924)
SYSNet(4783) ERANet(9310) ETWEBS(9415)
SeederNet(7538) GigaMedia(9416) Dwins(17416) EPOWER(18109)
SeedNet(4780) TradeVAN(9671) PAGICNet(4781) ISLNet(7649)
InfoServe(9739) FETnet(9674) TISNet(7535)
APOL(7482) AGC(3549) Intergrand(9917)
Unigate(9831) CNLINK(7540) AT&T(2687)
Symphox(9216) KGEx(9918) NCIC(9919) DYXNet(9244)
TATNET(17418) AboveNet(10133) SINGTEL(4845)
GSN(4782) TANet(1659) KBT (18042)
38 participants till Aug, 2002
TWIX MembersTWIX Members
• Max/Avg Volumn : 1.4/1.1 Gbps• This stats account for the aggregated inbound and outbound traffic volumns.
TWIX TrafficsTWIX Traffics
• Before 26 August, 2002
The maintenance of colocated border router when external leased circuits failed.
The incongruent requirements/policies regarding to extended BGP attributes among members.
The coordination of bandwidth increasing demands from members to members.
The policies of flapped routes.
Current IX IssuesCurrent IX Issues
Provides 10 Gbit access for future growth.
Scaled to multiple IX locations.
Provides out-of-band management facilities.
Promoting the regional IXP (IX Provider)
IPv6 IX trial and commercial services.
The re-examine of IX members’ qualification to explore more aggressive business models.
TWIX FuturesTWIX Futures