NetworkInfrastructure

OACISS naming / DNS

The majority of OACISS hardware has two network connections: One which is publicly routable, and one that provides access to the storage/NFS network.

All main nodes except Grover currently have 10Gbps public and private ethernet.

Network Hardware

Ethernet

The NIC Ethernet setup has four switches, two per cabinet, one each for private/storage and public networks.

• Dell N4032 x 2: Private network
  • Switches are stacked. R35 unit is master (#1) and R34 is failover/member (#2)
  • 40Gbps trunk link between racks (Fo1/1/1 and Fo2/1/1)
  • 40GbE to Mnemosyne (Fo1/1/2)
• Dell PowerConnect 8024 + N4032: Public network
  • PC8024 in R34
    • 10Gbps UOnet uplink (Te1/0/1)
    • 2 ports LAG trunk to R35 (Te1/0/21 & 22)

Ethernet interfaces are associated with DNS records:

• The public interface (e.g. FOO.nic.uoregon.edu)
• The private interface with local-only DNS record (e.g. FOO.stor)
• If present, the IPMI/ILO/BMC/etc interface with local-only DNS record (e.g. FOO-ipmi.stor)

Infiniband network

OACISS has a 36 port SB7700 EDR Infiniband switch.

Hosts generally have either one or two EDR links to the switch, providing either 100 or 200Gbps connectivity.

Hosts with 200Gbps:

• Cyclops
• Gorgon
• Eagle

Hosts with 100Gbps:

• Aurora (sx-aurora)
• Illyad
• Gilgamesh
• Pegasus
• Godzilla
• Mnemosyne

Hosts within the NIC network will resolve the domain '.ib' in reference to the IPoIB interfaces which provide ~80Gbps connectivity after the encapsulation penalty. Please note, there is no need to specify host.ib in order to have MPI utilize the IB interface; MPI will automatically detect and prefer the ultra-high-speed link unless it is explicitly disabled.

Planning is underway to connect all hosts to the Infiniband network at at least FDR speed.