https://www.gridpp.ac.uk/w/index.php?title=RHUL_(10_Questions)&feed=atom&action=historyRHUL (10 Questions) - Revision history2024-03-29T14:33:52ZRevision history for this page on the wikiMediaWiki 1.22.0https://www.gridpp.ac.uk/w/index.php?title=RHUL_(10_Questions)&diff=1117&oldid=prevSteve traylen at 11:13, 25 November 20052005-11-25T11:13:19Z<p></p>
<p><b>New page</b></p><div>''''Status: Complete'''' <br />
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== Question 1 == <br />
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''Provide the name and contact details of your local (Departmental) and Institutional network support staff.''<br />
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* My Departmental network support contact is: Barry Green, RHUL Centre for Particle Physics<br />
* My Institutional network support contact is: Nigel Rata, RHUL Computer Centre<br />
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== Question 2 ==<br />
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''Provide details of the responsibilities, together with the demarcation of those responsibilities, of your local and Institutional network support staff.''<br />
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* The departmental contact is responsible for: Particle Physics network - all equipment on subnet 134.219.108.0/22 except for gateway address, and physically all equipment up to but not including fibre pair used as uplink to Campus backbone routers.<br />
* The institutional contact is responsible for: the above fibres up to edge of campus (connection to London MAN)<br />
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== Question 3 ==<br />
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''What is a Regional Network Operator (RNO), and why does this matter to you?''<br />
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* An RNO is: London MAN (LMN)<br />
* I care because: they provide our connection to the rest of the internet.<br />
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== Question 4 ==<br />
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''What is SuperJANET4? And more importantly what is SuperJANET5?''<br />
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* SuperJANET4 is: UK academic network backbone<br />
* SuperJANET5 is: proposed upgrade<br />
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== Questions 5, 6, 7 and 9 (part) ==<br />
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5: ''Draw a simple diagram showing your local (Departmental) network and sufficient of your Institutional network such that you can trace a line from your end-system to the connection from your Institutes network into the RNO infrastructure.''<br />
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6: ''On the diagram produced in answer to Question 5, show the capacity of each link in the network and provide a note against each link of its contention ratio.''<br />
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7: ''On the diagram produced in answer to Question 5, colour and distinguish the switches and routers and for each device provide a note of its backplane capability.''<br />
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9.x: ''On the diagram produced in answer to Question 5 colour in the firewall(s) (or other security devices).''<br />
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(upload an image via http://wiki.gridpp.ac.uk/wiki/Special:Upload)<br />
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[[Image:NetworkAndContention.png]]<br />
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== Question 8 ==<br />
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''What is the average and peak traffic flow between your local (Departmental) network and the Institutional network?''<br />
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* Average traffic: average measured over a few days was ~ 1.5 Mbit/s<br />
* Peak traffic: during last few days of monitoring, have seen max 70 Mbit/s<br />
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''What is the average and peak traffic flow between your Institutional network and the RNO?''<br />
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* Average traffic: For October, the 100 Mbit/s link from RHUL to LMN at ULCC was on average 34% utilised.<br />
* Peak traffic: During the same period, the same link utilisation peaked at 54%.<br />
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''What is the total capacity of your Institutional connection to the RNO?''<br />
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* Our total capacity is: 100 Mbit/s<br />
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''What are the upgrade plans for your local (Departmental) network; your Institutional network and the network run by the RNO?''<br />
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* Departmental plans: None<br />
* Institutional plans: aspiration to upgrade to a 1 Gbit connection to LMN<br />
but no solid plans or timeline at present.<br />
* RNO plans: Not known<br />
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== Question 9 ==<br />
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''Do you believe in IS Security? Does your Institute believe in IS Security?''<br />
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* I'm a believer: YES<br />
* We're collective believers: YES<br />
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''Do you believe in firewalls? Does your Institute believe in firewalls?''<br />
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* I'm a believer: YES<br />
* We're collective believers: YES<br />
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''Provide information of how changes are made to the rule set of the firewall.''<br />
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* Firewall rules are changed by: particle physics network/system admins<br />
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''Provide a note of the capacity of this device and what happens when that capacity is exceeded.''<br />
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* The capacity is: 1Gb/s<br />
* When it goes over-capacity, the following happens: <br />
Don't know. There is a 100 Mb/s bottleneck that generally prevents this.<br />
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== Question 10 ==<br />
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''What is the best performance you can achieve from your end-system to an equivalent system located in some geographically remote (and friendly!) Institute?''<br />
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* Best performance is: ~5 MByte/s with bbftp (parallel streams) or 1.2 MByte/s with sftp (single stream).<br />
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For your end-system: <br />
<br />
: ''Do you understand the kernel, the bus structure; the NIC; and the disk system?''<br />
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* I understand: qualified YES<br />
(i.e. yes, to some extent, but one could always understand more)<br />
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: Do you understand TCP tuning and what it can do for you? <br />
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* I understand: NO, at least not across a WAN.<br />
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: Do you understand your application and what it can do to your performance? <br />
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* I understand: qualified NO<br />
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What is meant by "my application"? I don't consider the grid middleware or VO jobs to be mine, I am just letting LCG and VOs run them on my systems. It is their business to tune these applications.<br />
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[[Category:Network]]<br />
[[Category:London Tier2]]</div>Steve traylen