DAQ Networking

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Revision as of 23:48, 29 July 2018 by Cameronc (Talk | contribs) (DAQ Network Map)

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See also - DAQ_Doc_Portal

DAQ Network Components

Portserver

A portserver is a telnet (insecure network interface) capable, serial cable connected, network interface. The advantage to using serial connections is it allows a network connection during boot and enables easy remote power cycling and NVRAM restoration to ROCs.

Login, Log Off, Kick Idles

Command Line Functions

ROC NVRAM Restore

Console Server

SSH to use telnet

Raspberry Pi

Minicom

Ethernet Switch

NFS Network File System

Main Article - NFS Installation Guide

To mount an NFS filesystem to a ROC (linux or VXworks) there are several steps involved (see How To Forge - NFS Guide)

  • Have NFS serve the CODA 2.6.2 directory to localhost (127.0.0.1).
  • Mount it, in a different location (pretending to me the VME controller):
    • example /etc/exports:
/coda/2.6.2/    localhost(rw,sync,no_root_squash,no_subtree_check)
mount it /somewhere_else
    • (as root)
mkdir /somewhere_else 
mount localhost:/coda/2.6.2 /somewhere_else

FAQ

For linux systems:

  • Make sure that the ethernet ports being used are configured to DHCP over the ethernet network
    • Edit the /etc/sysconfig/network-scripts/ifcfg-eth# configuration files are correctly set to allow the desired ethernet port to DHCP on-boot (on RHEL and Centos only)
    • Acquire a static IP from the ethernet network you are using (if its a LAN you manage set these in the router or switch yourself)
    • Identify the hostnames and IPs of the local machine and remote server you want to connect to in the /etc/hosts file
    • Make sure the /etc/sysconfig/network file has the localhost's hostname set in it (can also be done with the 'host' unix command)
    • On the NFS host server ensure that the /etc/exports file correctly targets the IPs or entire network (using .0 as the last digit of the IP address) that you want to server the NFS contents to
      • After updating a network connection or target computer in /etc/exports run the "service autofs restart" or "exports -a" command as root
      • Make sure the /etc/hosts file includes the same information for all computers on the local network involved in the NFS file sharing, with 127.0.0.1 assigned to 'localhost' on all
    • Make sure that the permissions for the shared files allow for appropriate read, write, and execute privileges for all users and groups, on local and remote computers
      • To check the user and group permissions are set correctly, the naming conventions can be deceptive - use ls -n to show the number of users and groups, which is what really matters
      • Even if two separate computers have the same user and group names but their user and group numbers are different you are able to tell this and assign the rwx privileges correctly on the shared folders (using 'chown -R' and 'chmod -R 777' or whatever correct permissions you want to set)

For VXworks systems:

  • The same things apply as for ethernet network mounted file systems, except that VXworks uses the ~/.rhosts file to determine which IPs to allow to mount an NFS shared folder
    • Therefore, follow the /etc/exports file convention, except with ~/.rhosts instead for VXworks ROC file sharing
    • The ROC_name and ROC_name.jlab.org addresses both need to be listed for it to work

DAQ Network Map

For History, see DAQ Network Map

As of July 27th 2018 DAQ Network Map
Location SSH Hostname Software ROC# Hardware ROC# and Branch Serial Access Method Acces Command
RHRS 'happex7' 26 02 branch 4 serial port via portserver hatsv3 port 2 'telnet hatsv3 2002'
LHRS 'hallavme14' 25 05 branch 4 serial port via portserver hatsv21 port 4 'telnet hatsv21 2004'
TS 'happex4' no ROC no ROC serial port via network console server acons1 port 8 'ssh adaq:ttyS8\@acons1'
Counting House 'halladaq6' 23 00 branch 1 serial port via network console server acons1 port 4 'ssh adaq:ttyS4\@acons1'
Injector 'qweak1' 24 00 branch 2 serial port via network rpi12 server 'minicom' 'ssh pi@rpi12' the 'run_minicom'

Accessible Computers

Workspace Computers
Location SSH Hostname Username
Hall A LHRS halla-lpt1 ahut
Hall A RHRS halla-lpt2 ahut
rpi4 pi
Hall A Counting House adaq1 apar
adaq2 apar
adaq3 apar
adaq4 apar

Phone Numbers

Commonly Used Phone Numbers
Who Why Number
Machine Control Center (MCC) To control the accelerator (757) 269 7047 or 7048
Security Guards Emergency (757) 269 5822
Normal (757) 269 7169
Hall A Counting House Back Room (757) 269 5505
(757) 269 5509
Control Room (757) 269 5501
Radcon Radiation help (757) 876 1743
Computer Helpdesk Computer or network help (757) 269 7155
Health Clinic Health questions (757) 269 7539