Aug 20051ASNet – Academic Services Network TEIN2 Collaboration (Engineer Concerns) Yu-lin ASNet / APAN-TW 20th APAN Meeting Aug 25, 2005

Aug 20052ASNet – Academic Services Network Items of Contribution to TEIN2 ● Money, Human resources and offices – Local staffs: engineers, and secretaries in every pop – Office spaces for local staffs ● Facilities – Routers, switches, servers, rack spaces... ● Circuits – The most complex items! – How many efforts should TEIN2 engineers pay on manage lost of different circuit properties to carry traffics from one node to another node?

Aug 20053ASNet – Academic Services Network Human resources and offices ● Local Staffs hired by REN – REN usually operated by (or collaborated with) university teachers and students – has budgets to hire engineers and research assistants – Easy to setup a small team for TEIN2 to perform servers maintenance, paper work, etc. ● Share office – TEIN2 local staff can share offices with REN – without extra expense (or in lower cost) to rent an office

Aug 20054ASNet – Academic Services Network Facilities ● TEIN2 calls for facility donation (previous meetings) ● New facility – Usually come with contract of maintenance – When original maintenance contract expires  !! ● REN usually has contract with local S.I. (service integrators) or vendors  Put TEIN2 facilities into maintenance contract with REN’s facilities  get better (cheaper) service fee  save money $$

Aug 20055ASNet – Academic Services Network Circuits – Layer 3 transit ● Example, REN-1 transit TEIN2 from A to B TEIN2 A TEIN2 B TEIN2 traffic “routed” by REN-1 From A to B. A B REN-1

Aug 20056ASNet – Academic Services Network Circuit – Layer 2/1 transport ● Example, REN-1 transport TEIN2 from A to B TEIN2 A TEIN2 B TEIN2 traffic “transported” by REN-1 From A to B. REN-1 A B

Aug 20057ASNet – Academic Services Network Difficulty on Layer 3 ● Routing and Troubleshooting – Lots of adjustment/negotiation should be made if someone been inserted into TEIN2 or REN (the donator) routing clouds – What will happened if REN accidentally inject wrong routes into TEIN2 (or vice versa)? – Troubleshooting is a challenge if something goes wrong especially on time-critical issue ● Functionality – What will happened if TEIN2 requests something that REN does not support yet? (ex, multicasting, ipv6...)

Aug 20058ASNet – Academic Services Network Layer 2/1 makes engineer happy ● Pure bandwidth from Engineers’ point of view – No routing negotiation between TEIN2 and REN (the donator)  easy to control routing – Simple debug procedure  easy to identify the responsibility – Not necessary to inform REN before enable new functions (in general case)

Aug 20059ASNet – Academic Services Network Layer 2/1 issues? ● Possibilities – Light Path – MPLS Layer 2 VPN (Virtual Circuit) – Ethernet VLAN ● Simplicity (for TEIN2 engineer) – Light Path ~= MPLS L2 VPN > Ethernet VLAN ● VLAN still needs negotiation on some services, ex multicasting... ● Simplicity (for REN engineer, the donator) – Light Path > MPLS L2 VPN > Ethernet VLAN ● Entry level of MPLS (as well as VLAN) is high ● It is not able to enable VLAN without special equipments on WAN

Aug ASNet – Academic Services Network Layer 2/1 issues? ● Resilience – MPLS L2 VPN ~= Ethernet VLAN > Light Path ● Assumption: does not config protection path for Light Path – The convergence time of restoration MPLS L2 VPN >= Ethernet VLAN Light Path > MPLS L2 VPN >= Ethernet VLN ● if config a protection on Light Path, it is possible to get 50ms restoration time (the SDH quality) ● Operation Cost – Incl. device: Light Path > MPLS L2 VPN > Ethernet VLAN – Excl. device: Ethernet VLAN > MPLS L2 VPN ~= Light Path

Aug ASNet – Academic Services Network Troubleshooting on Layer2/1 ● TEIN2 – Facing to REN NOC – Simple and single contact point to a specific bandwidth ● REN – Facing to circuit company – Maintain the exist escalate procedure – Simply take TEIN2 as one of customers (very important customer!)

Aug ASNet – Academic Services Network ASNet’s Choice ● ASNet prefers to provide MPLS L2 VPN Circuit – WDM/SDH switches are still expansive – Ethernet VLAN brings complex management procedures to our engineers – MPLS is enabled on ASNet entire network ● A choice based on – Financial guys are happy – Engineers are happy  Hope TEIN2 members are happy too  Hope TEIN2 members are happy too

Aug ASNet – Academic Services Network Thank You!