Grenoble:Network
Overview of Ethernet network topology
Network devices models
- gw: Dell S5296F-ON
More details (including address ranges) are available from the Grid5000:Network page.
HPC Networks
Infiniband 100G network
An Infiniband 100G network interconnects nodes from the drac cluster. It has a single switch.
- Switch: Mellanox SB7700 IB EDR / 100G
- Host adapter: Mellanox MT27700 [ConnectX-4] dual-port
- Each of the 12 drac nodes has two 100G connections to the switch
Omni-Path 100G network
Nodes of the dahu, yeti and troll clusters are connected to Omni-Path switches (Intel Omni-Path 100Gbps), beside the Ethernet network.
This Omni-Path network interconnects both the Grid'5000 Grenoble nodes and the nodes of the HPC Center of Université Grenoble Alpes (Gricad mésocentre).
The topology used is a fat tree with a 2:1 blocking factor:
- 2 top switchs
- 6 leaves: switchs with 32 downlinks to nodes and 8 uplinks to each of the two top switches (48 ports total)
All 32 dahu nodes are connected to a same leaf. The 4 yeti and 4 troll nodes are connected to another leaf.
Other ports are used by nodes of the HPC center of UGA.
A generated topology (using the output of opareports -o topology :
IP Range
- Computing : 172.16.16.0/20
- Omni-Path : 172.18.16.0/20
- Virtual : 10.132.0.0/14