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A. Name: Policy on Use of Ethernet Switches at PennNet wallplates
C. Author(s): J. Edwards, M. Wehrle ISC N&T
D. Status: [ ] proposed [ ] under review [x] approved [ ] rejected [ ] obsolete
E. Date proposed: 2003-05-21
F. Date revised:
G. Date approved: 2003-09-22
H. Effective date: 2003-10-14
II. Authority and Responsibility
Information Systems and Computing's Networking organization is responsible for the operation of PennNet (Penn's data networks) and therefore has the authority and responsibility to specify requirements for any devices connecting to PennNet. This authority extends to the device type in the case of networking electronics such as a router, repeater, or switch. It also extends to certain configuration parameters of a device that could adversely impact other parts of the network.
III. Executive Summary
This policy specifies the conditions under which an Ethernet switch may be connected to a PennNet wallplate. It also provides "best practice" recommendations to guide the network user in deploying switches appropriately.
The purpose of this policy is to identify the locations and circumstances in which an Ethernet switch may be connected to a PennNet wallplate. While multi-port Ethernet switches can be convenient in providing access to multiple networked devices in locations where only one PennNet wallplate port is available, use of switches in certain situations can cause significant problems (see V. Risk of Non-compliance). This policy allows the network user to take advantage of the convenience of multi-port switches in cases where doing so will not adversely affect the provision of network service to others.
V. Risk of Non-compliance
Improper use of switches can cause significant problems (poor performance, communication failure, etc.) for other users of PennNet. Additionally, it can make troubleshooting the network more difficult and time consuming.
This policy does not apply to repeaters, which are addressed in the Repeater policy at http://www.isc-net.upenn.edu/policy/approved/19991022-repeater.html.
Restrictions on the use of Ethernet switches apply to all standard PennNet wallplates in locations where ISC N&T provides support. Network wallplates that are provided and supported by organizations other than the University's central networking organization may not be covered directly by this policy. Network users are advised to check with their local LSP if uncertain.
VII. Statement of policy
VIII. Recommendations and Best PracticesThe following related practices are strongly recommended by ISC Networking, towards a more efficient network.
A. Verification: ISC Networking does not plan to actively police the network in an effort to discover non-compliant switches, but will act on those discovered during the normal course of events in operating and/or troubleshooting the network.
B. Notification: Notification shall be made to the LSP for the area. Whenever possible and practical, the user of the switch-connected node(s) will also be notified.
C. Remedy: Remedy will be the immediate removal of out-of-compliance switches. Interim solutions to retain connectivity may be available through your local computing support and/or ISC Networking.
D. Financial Implications: The network user will be responsible for the costs of any new port activations, new wiring, interim solutions, or switch upgrades, and any charges defined by the troubleshooting policy at http://www.isc-net.upenn.edu/policy/approved/20020827-troubleshooting.html.
E. Responsibility: Responsibility for remedy lies with the network user or the users' department. In the vast majority of cases, the area LSP will have involvement in the implementation of the remedy.
F. Time Frame: Non-compliant connections must be remedied immediately to reduce risk of networking failures for other network users. Interim solutions, which may involve having the network user rent ISC-owned equipment, should be made available by ISC Networking (where possible and with the cooperation of the network user) within 2 business days to allow the network user to continue to receive service. Final solutions should be implemented within 30 days.
G. Enforcement: Please see the Policy on Computer Disconnection from PennNet at http://www.upenn.edu/computing/policy/disconnect.html
H. Appeals: Please see the Appeals section of thePolicy on Computer Disconnection from PennNet at http://www.upenn.edu/computing/policy/disconnect.html
IEEE standard 802.3 CSMA/CD Access Method
IEEE standard 802.1D MAC Bridges