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Trinet

the Otaniemi campus student network founded in 1986

Trinet Network Technology

General

Trinet network base solely on Ethernet technology. The core network and Internet connections were upgraded to 10 Gbps during 2009 and 2010, and to 100 Gbps during 2018. The remaining part of the network uses 1 Gbps or 10 Gbps links for switch-to-switch connections. When the ongoing 1 Gbps access connectivity upgrade goes further, all switch links will be upgraded either to 10 Gbps (non-protected core access) or to 10+10 Gbps (protected core access).

The network topology is visualized in the Trinet weathermap.

Routers

Trinet has two Juniper MX204 routers which provide IPv4 and IPv6 routing for the whole network. Both routers have their own 100 Gbps Funet connection, and routers themselves have been linked with 100 Gbps. The total forwarding capacity for each router is around 400 Gbps.

Current sites and edge switches

The Trinet network base on switches from multiple generations. Especially the older switches do not allow all modern services and protections to be used, most prominently IPv6 multicast. Please refer to the following table if you are interested in the current situation in the apartment buildings or in the AYY offices.

LocationSwitchesUser AccessTowards BackboneIP MTUDHCP FilteringRA/DHCPv6 FilteringIPv4 MulticastIPv6 Multicast1 Gbps Schedule
AYYJämeräntaival 12 * Cisco Catalyst 4506-E1 Gbps20+20 Gbps9000XXXX
AYYJämeräntaival 31 * Juniper EX62101 Gbps10+10 Gbps9000XXX
AYYJämeräntaival 5 A1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYJämeräntaival 5 B1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYJämeräntaival 5 C1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYJämeräntaival 61 * Juniper EX62101 Gbps10+10 Gbps9000XXX
AYYJämeräntaival 7 A1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYJämeräntaival 7 B1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYJämeräntaival 7 C1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASJämeräntaival 91 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASJämeräntaival 10 A-B1 * HP ProCurve 2650100 Mbps1 Gbps1500X X 8 / 2019
HOASJämeräntaival 10 C-D1 * HP ProCurve 2650100 Mbps1 Gbps1500X X 12/ 2019
HOASJämeräntaival 10 E-F1 * Cisco Catalyst 4506-E100 Mbps10+10 Gbps9000XXXX3 / 2020
HOASJämeräntaival 10 G1 * HP ProCurve 2650100 Mbps1 Gbps1500X X 5 / 2019
HOASJämeräntaival 10 H1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASJämeräntaival 11 A-D2 * Cisco Catalyst 4506-E1 Gbps20+20 Gbps9000XXXX
HOASJämeräntaival 11 E-F1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASJämeräntaival 11 G-I2 * Cisco Catalyst 4506-E1 Gbps20+20 Gbps9000XXXX
HOASJämeräntaival 11 J-M2 * Cisco Catalyst 4506-E1 Gbps20+20 Gbps9000XXXX
AYYOtakaari 18 A1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYOtakaari 18 B-C1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYOtakaari 201 * HP ProCurve 5406R1 Gbps10+10 Gbps9000XXXX
AYYOtaranta 8 A1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYOtaranta 8 B1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYOtaranta 8 C1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYOtaranta 8 D1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYOtaranta 8 E1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYServinkuja 11 * HP ProCurve 5412zl1 Gbps10+10 Gbps9000XXXX
OASServinkuja 2 A-C1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
OASServinkuja 2 D-F1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASServinkuja 5 A1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASServinkuja 5 B1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASServinkuja 61 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
OASServin Maijan tie 11 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
HOASServin Maijan tie 31 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYServin Maijan tie 6 A-C1 * Juniper EX42001 Gbps10+10 Gbps9000XXX
AYYServin Maijan tie 6 D-G1 * Cisco Catalyst 4506-E1 Gbps10+10 Gbps9000XXXX
AYYServin Maijan tie 101 * Juniper EX62101 Gbps10+10 Gbps9000XXX
AYYServin Maijan tie 12 A-F1 * Juniper EX62101 Gbps10+10 Gbps9000XXX
AYYServin Maijan tie 12 G-K1 * Juniper EX62101 Gbps10+10 Gbps9000XXX
AYYAtlantinkatu 72 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYHaarniskatie 82 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYKaj Franckin katu 41 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYKääpiöidenpolku 42 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYMäyrätie 11 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYRummunlyöjänkatu 11 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYRummunlyöjänkatu 31 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYTuhkimontie 22 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYTurkismiehentie 81 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYYVaasankatu 101 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
Rantasauna1 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
Servin Mökki1 * HP ProCurve 2920-48G1 Gbps10 Gbps9000XXXX
TF Otakaari 221 * Juniper EX42001 Gbps10+10 Gbps9000XXX
TF Otakaari 221 * HP ProCurve 2626100 Mbps1 Gbps1500X X  
TF Otakaari 223 * HP ProCurve 2650100 Mbps1 Gbps1500X X  
AYY Otakaari 111 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXX
AYY Otakaari 112 * HP ProCurve 2910al1 Gbps10 Gbps9000XXXX

Future sites

The following sites are planned to be connected to the Trinet network in the near future.

LocationSwitchesUser AccessTowards BackboneIP MTUDHCP FilteringRA/DHCPv6 FilteringIPv4 MulticastIPv6 MulticastSchedule
AYYArkadiankatu 281 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXXH2 / 2018
AYYKirkonkyläntie 161 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXXH2 / 2018
AYYPohjavedenkatu 41 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXXH2 / 2018
AYYRuusulankatu 51 * Cisco Catalyst 4506-E1 Gbps10 Gbps9000XXXXH2 / 2018

Unicast and Multicast Routing

Border Gateway Protocol (BGP) is in use for both IPv4 unicast/multicast and IPv6 unicast/multicast routing. To decrease Internet connectivity convergation delay in case of a link failure, Bidirectional Forwarding Detection (BFD) is utilized with IPv4 BGP to detect a link failure on a sub-second time scale. Internal Gateway Protocol (IGP), namely, Intermediate System to Intermediate System (IS-IS), is in place to establish connectivity between the Trinet routers by advertising the loopbacks and the link networks. The second important task for the IGP routes is to provide BGP next-hop reachability. Otherwise BGP carries all external and internal route information.

Both Funet uplinks are normally in use as the same BGP metric is used in the both links. The model is called "hot-potato" aka closest-exit routing.

Multicast routing uses Protocol Independent Multicast - Sparse-Mode (PIM-SM) and PIM - Source-Specific Multicast (PIM-SSM) in addition to Multicast Source Discovery Protocol (MSDP), which enables inter-domain IPv4 multicast.

Customer Access

Trinet utilizes Virtual Router Redundancy Protocol (VRRP) on the direction of the customer networks. Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) is used with IPv4 and IPv6 multicast, respectively. Jumbo frames are enabled and the network supports IP Maximum Transfer Unit (MTU) up to 9000 bytes.

User IP address configurations are delivered by Dynamic Host Configuration Protocol (DHCP) in IPv4, and by stateless address autoconfiguration (SLAAC) and DHCPv6 in IPv6.

Trinet security and filtering policies are described in the Usage Policy.

© 2018 Veijo Kyläverkko <verkko@ayy.fi>
Last updated: 2018-10-03