Technical Solution Proposal

The NicIX team

IXP architectures

Layer 2Use a switch to interconnect ISPs

• Layer 2• Layer 2 with router reflector• Layer 2 with route server

Layer 3Use a router to interconnect ISPs

Selection of architecture

Layer 2 preferredMore autonomy to ISPsNo much processing in layer 2

The switch will not be bottleneck

Low costSimple for administration

Considered alternatives

Alternative ALayer 2 with route reflector

• Two switches for redundancy• Two route reflectors for redundancy

Alternative BLayer 2

• Two switches for redundancy

Alternative A - topology

Alternative A – some issues

The IXP is an AS( public ASN) Public IP addresses used BGP4 used ISPs may/may not collocate their

routers Transit for IXP services

The IXP gets transit from one or more ISPs

Alternative A - transit using IGP

Alternative A - transit using IBGP

Alternative A - transit using private connection

Which transit method to use? IGP

Not suitable for transit via multiple ISPs Additional administrative overhead

IBGP Suitable for transit via multiple ISPs

Private connection Needs additional physical setup Not suitable for transit via multiple ISPs

IBGP preferred

Alternative B - Topology

Alternative B

Alternative B – some issues

The IXP is one AS (public ASN) Public IP addresses used BGP4 used Full mesh peering between ISPs IXP peers with the transit ISP(s)

Alternative B - transit

Favorite topology

Favorite Topology

Equipment - selection

Switch Should have Gigabit Ethernet ports Should have sufficient ports Cost Technical support

Router Cost Technical Support Ipv6 support

Switch – list

Router - list

Overall equipment list

Other costs

Total cost

Refernces

Cisco Systems Inc., “Internet eXchange Points (IXP), peering and ISP Interconnection: The key stone of Internet Economy”, 1999

Barry Raveendran Greene , ”L2 Internet eXchange Point (IXP) using a BGP Route Reflector Technical Design, Configuration, and General Advice about IXPs”, 2000

Communication Systems Design 2002 Projects,” http://csd.ssvl.kth.se/~csd2002mozambiqueix”,MozambiqueIX

http://www.cisco.com http://www.extremenetworks.com http://www.techdata.com

Thank You