MWN Connection - Leibniz-Rechenzentrum

The Munich Science Network (MWN) connects buildings of Munich universities (LMU, TUM, University of Applied Sciences Munich, University of Applied Sciences Weihenstephan-Triesdorf, etc.) and other scientific institutions in the Munich region by means of a scalable and highly redundant data network.

The use of the MWN may be useful for an institution for the following reasons:

use of bandwith-intensive LRZ services and/or services only offered within the MWN (e.g. backup and archive, cloud storage)
to reach systems connected to the MWN (close cooperation with higher education institutes)
Use as a transit network to reach systems of the same institution and save costs by co-using lines
Shared use of the LRZ's connection to the German Research Network to gain access to the Internet. For this purpose, the conclusion of a fee-based contract for a service package at the DFN is mandatory (see below for further details). If the WiN connection is disturbed, the backup Internet transition of a commercial provider can be utilized if provider-independent IP addresses are used.

Scope of Services and Service Specifics

The Munich Science Network (https://doku.lrz.de/ueberblick-ueber-das-muenchner-wissenschaftsnetz-mwn-10745844.html) is an Ethernet-based IP network that connects various locations of higher education institutions. The core network sites are redundantly connected via fiber optic lines of at least 25 Gbit/s, generally 100 Gbit/s, and have uninterruptible power supplies and physical access protection.

The locations of our members are connected to the core network sites with bandwidths between 1 Gbit/s and 100 Gbit/s. In addition to own or rented fiber optic connections, managed connections (Ethernet) are also used. In special cases, other technologies (IP connections of other providers, DSL, radio) can also be used.

Depending on the needs of the customer organisation, a site can be connected without redundancy, using redundant components or geographically redundant.

The protocols IPv4 and IPv6 are supported. The data traffic of the affiliated institutions is treated equally (‘best effort’).

An exclusive use of the MWN as a transit network is possible. However, the implementation must be coordinated individually with the LRZ. The use as a transit network is generally realized as a separate routing instance (Layer3-VPN, VRF). The transport of Layer2 (Ethernet VLANs) is possible in special cases.

Service Parameter

The availability of the MWN backbone can be found at: https://monitoring.mwn.de/infovista/mwn-availability.html.

Maintenance times: Every Tuesday and Thursday from 7.00 am to 9.00 am.

The MWN is operated with as little disruption and interruption as possible. Fixed maintenance times ("maintenance windows") are reserved for carrying out planned routine maintenance, set-up and installation work and for software and hardware updates. Maintenance windows are generally only utilised when necessary, taking into account the requirement to keep the impact as low as possible.

Emergency maintenance measures for a given reason (e.g. CERT security notice) are carried out immediately by the LRZ in order to ensure the security of the MWN. Information about the emergency and the maintenance measures carried out as well as their expected duration and purpose is provided immediately via appropriately defined mechanisms.

Planned interruptions (estimated time, duration and affected areas or services) are announced at least one day in advance. The announcements are made via

the LRZ Service Status Board (https://status.lrz.de) and
Mail distribution lists for the network managers

(Guidelines MWN (german) § 2).

Set-up times: 2 weeks after all requirements have been met

Prerequisites are e.g. the installation of the access line and the availability of the necessary interfaces.

Requirements

To use the WiN Internet connection, the conclusion of a service package at the DFN is a prerequisite. Often such an agreement has already been concluded by higher-level institutions. See https://www.dfn.de/dienste/entgelte/ .

In many cases, the installation of the access line to the MWN requires installation work in the building. This may require a permit from the building owner (a Gebäudeeigentümererklärung, GEE)

Usage Guidelines

User / Customers

This service is made available to the following user classes. The following fees are to be paid by the individual user classes:

User Class	Cost Rate
1	Free
2	Basic Services
3	Own Costs (Operating + Investment Costs)
4	Own Costs (Operating + Investment Costs)
5	Own Costs (Operating + Investment Costs)
6	Full Costs (Own + Overhead Costs)

Fees

Fee components:

Ongoing shared use fee for the MWN: The fees for shared use of the MWN are based on the connection speed to the MWN.

The fees are calculated annually by dividing the total costs of the MWN by the number of interfaces of the backbone routers. The following fees apply:

Transfer Rate	Operating Costs	Own Costs	Fulls Costs
100 Mbit/s	On Demand	On Demand	On Demand
1 Gbit/s	On Demand	On Demand	On Demand
10 Gbit/s	On Demand	On Demand	On Demand
25 Gbit/s	On Demand	On Demand	On Demand
40 Gbit/s	On Demand	On Demand	On Demand
Minor data traffic per end device per year	On Demand	On Demand	On Demand

For the smallest institutions (with up to 10 devices), it is possible, after consultation with the LRZ, not to fix the fees via the connection speed, but to use the number of terminal devices to be connected as a measure for determining the fees.

These fees include (if desired) the following LRZ services:

DNS service (incl. NIXU web interface)
Secomat monitoring (see www.lrz.de/services/netzdienste/secomat/)
WiN access monitoring

Bandwidth share for the LRZ's provider connection to the German Science Network (X-WiN).

The costs for the connection bandwidth at the provider connection are generally calculated with the bandwidth of the connection to the MWN. If the LRZ can ensure by technical means that the X-WiN uplink cannot be used or cannot be used at full bandwidth, the bandwidth share can be reduced.

Bandwidth share for the utility connection to the science network	Own Costs
Costs per 1 Gbit/s connection bandwidth	on Demand

Fees for WiN use: If the Internet is to be used via the MWN's existing WiN connection, this is possible within the framework of the LRZ's provider connection to the science network. Additional fees are incurred here through a so-called service connection. The fees for this must be paid to the DFN, see: www.dfn.de/dienste/entgelte/. A separate contract must be concluded with the DFN for this purpose. Such a contract has often already been concluded by higher-level organisations.

One-off connection costs: These costs must be paid once for the additionally required interface in the router or switch to which the institution to be connected is connected. In principle, a termination device (monitoring switch) operated by the LRZ is required at the customer location.

Costs for the feeder line: The type of feeder line must be agreed individually with the LRZ. The costs of the feeder line must always be borne by the institution to be connected. These costs can be incurred monthly (e.g. fibre optic line), once (e.g. installation of a fibre optic line on private property) or not at all (location of the institution in a university building). The LRZ provides support in selecting and applying for the line.