BGV network as installed in the service tunnel in P4.

The DAQ switch is configured as gateway and requires a special configuration detailed in BgvSwitch.


The bgvctrl node also act as the storage machine and needs to be accessible via the data network. For this it's best to add a second IP address to one of the network interfaces.

create the file (on bgvctrl): /etc/sysconfig/network-scripts/ifcfg-eth0:1

with the content:


The HLT nodes need to know how to route packets from the front ends (tell1s, ODIN) because they don't sent arp info. The correct routing table on the HLT nodes is the following one:

# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface UG    0      0        0 eth1 U     0      0        0 eth1   U     0      0        0 eth0     U     1002   0        0 eth0     U     1003   0        0 eth1         UG    0      0        0 eth0
To use the switch gateway to reach the DAQ network.

To setup manually or permanently:

# direct command on hlts:
sudo route add -net netmask gw
# or
ip route add via

# add permanently:
# create file /etc/sysconfig/network-scripts/route-eth1
# with: via

# if needed:

sudo route delete default gw

The IP addresses assignment are managed by dhcp on the bgvctrl machine. The configuration file is /etc/dhcp/dhcpd.conf

Topic attachments
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PNGpng BGV_network_single.png r1 manage 122.7 K 2017-09-22 - 17:41 ColinBarschel BGV network map
Unknown file formatpptx BGV_network_single.pptx r1 manage 48.6 K 2017-09-22 - 17:40 ColinBarschel BGV network map
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Topic revision: r3 - 2017-09-28 - ColinBarschel
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