Service Desk Knowledgebase: Networking

This is the Networking content page of the CL Wiki Service Desk Knowledgebase. Its purpose is to provide information to the Service Desk team on how to handle problems and requests about this CL service. If you are involved with the provision of this CL service please feel free to add to the knowledge about that it.

If CL staff need to tell the Service Desk team about problems with this service please email
sys-admin-aside@cl.cam.ac.uk.

Return to the Service Desk Knowledgebase SERVICE PORTFOLIO

Key Service Description & URLs

• The CL network
• Computer Laboratory News (Twitter use @UC_CL_SysAdm)

CL Customer Documentation

William Gates Building Floor Plans (inc. Room Codes):

• Ground floor (G)
• First floor (F)
• Second floor (S)
• Find a room

VLANs

• 298 = Managed Windows (AD delegated machines)
• 398 = Managed Linux
• 498 = Managed Macs
• 98 = DMZ (with no Windows machines in it)

Further CL Sys-Admin Resources

• http://www.wiki.cl.cam.ac.uk/rowiki/SysInfo/HelpDesk/Networking - Networking
• http://www.wiki.cl.cam.ac.uk/rowiki/SysInfo/HelpDesk/Networking/VPN_request - Dealing with a VPN request

Underpinning Services

• ??? - Any supporting or underpinning services

Customer-base for this Service

• All staff and students of the Computer Laboratory

Costs

• Free to all current staff and students of the Computer Laboratory

SLA

• N/A

Service Desk Call Handling Procedure

• Procedure for patching is???

• Dealing with a VPN request: see http://www.wiki.cl.cam.ac.uk/rowiki/SysInfo/HelpDesk/Networking/VPN_request

• RT tickets can be escalated to the net-admin team by changing the Queue to net-admin with the Owner set to Nobody & Status set to new. Tell the requestor:
  I am passing this request over to our Network Admin team who, I'm sure, will be in contact shortly.

Request to add machine to department network

If it is a private laptop then get them to register it at the DHCP request page and request a connection on the appropriate VLAN.

Adding IP addresses & CNAMES

0. Check that the person is entitled to what is being requested using https://dbwebserver.ad.cl.cam.ac.uk/administration/HR/HRList.aspx

0. Determine the IP address range that should be use for a given requested VLAN using https://dbwebserver.ad.cl.cam.ac.uk/SCG/Networks/Networks.aspx

1. Make sure Pageant.EXE is running and has your private key - by double clicking on CL.ppk or similar.

2. Use PuTTY and go to the CL's ssh-remote-0.cl.cam.ac.uk

3. Make the PuTTY window longer.

4. Type kinit & press [Enter]

5. Enter your CL Password for CRSid@AD.CL.CAM.AC.UK & press [Enter]

6. Type ssh -K laira & press [Enter] to go to the privileged machine laira

7. Give your CL [sudo] password for CRSid: & press [Enter]

8. At the laira:~$ prompt use cd /anfs/glob/src/etc/named/src and [Enter]

9. Check-out the cl.data file with co -l cl.data and [Enter]

10. Use vi to edit the file with vi cl.data and [Enter]

Adding an IP Address:

• Search for the start of the address range with something like /128.232.98.1 and [Enter]
• Ctrl+F to scroll Forward to user@/vol/vol1/homes-$PARTITION area for CRSid (as it's not there yet)
• Down-arrow to start of line above where it should be.
• Use Shift+A to enter --INSERT-- mode
• Make an entry like:

 saluki1.dtg     IN      A       128.232.98.206
                 IN      TXT     "RT#94231"

(NOTE: the gaps made using <Tab> not space)

• [Esc] out of INSERT mode
• :wq and [Enter] to write the file and quit vi

(NOTE: the gaps made using <Tab> not space)

Adding a CNAME:

• Search for the machine name using something like /puppy38 and [Enter]
• Ctrl+F to scroll Forward to user@/vol/vol1/homes-$PARTITION area for CRSid (as it's not there yet)
• Down-arrow to start of line above where it should be.
• Use Shift+A to enter --INSERT-- mode
• Make an entry like:

 puppy38.dtg     IN      A       128.232.20.67
                 IN      TXT     "VM in husky cluster"   ; oc243 rt#88303
 acr31-containers.dtg IN CNAME   puppy38.dtg     ; rt#91603
 rscfl-freebsd.dtg IN    CNAME   puppy38.dtg     ; rt#94176

(NOTE: the gaps made using <Tab> not space)

• [Esc] out of INSERT mode
• :wq and [Enter] to write the file and quit vi

GENERAL NOTES on vi

• /string and [Enter] (search for the string)
• : = command
• :w and [Enter] is write
• :q! and [Enter] = quit without writing (if you mess up!)
• :help and [Enter] for help
• Arrow-keys scroll around text
• Ctrl+F to page-down scroll through text
• Shift+A to go into --INSERT-- mode
• [Esc] escape out of --INSERT-- mode

0. rcsdiff cl.data and [Enter] to check what changes have actually been made

0. Use ci -u cl.data and [Enter] to check-in and add a comment of the RT ticket number e.g. RT #94171 then [Enter] and exit with .[Enter]

0. Go up with cd .. and [Enter]

0. Use make install and [Enter] (give your CL [sudo] password for CRSid: & press [Enter] if required)

0. Use exit and [Enter] to close down PuTTY

0. In RT reply to the user and resolve the ticket.

Contacts

Primary

• ???@cl.cam.ac.uk (Goes to ???)
• ???@lists.cam.ac.uk (Goes to ???)
• Tel: ???

Other

• Martyn Johnson
• Chris Hadley

Availability

• Monday:
• Tuesday:
• Wednesday:
• Thursday:
• Friday:
• Saturday: Closed
• Sunday: Closed

Hints, Tips & Known Issues

Title Person (Date)

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Categorising Keywords

• Network Networking VPN Router