6–Configuring RoCE
Configuring RoCE on the Adapter for Linux
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VLAN Interfaces and GID Index Values
If you are using VLAN interfaces on both server and client, then configure the
same VLAN ID on the switch. If you are running traffic through a switch, the
Infiniband applications must use the correct GID value, which is based on the
VLAN ID and VLAN IP address.
Based on the following results, the GID value (-x 4 / -x 5) should be used for any
perftest applications.
# ibv_devinfo -d qedr0 -v|grep GID
GID[ 0]:
fe80:0000:0000:0000:020e:1eff:fe50:c5b0
GID[ 1]:
0000:0000:0000:0000:0000:ffff:c0a8:0103
GID[ 2]:
2001:0db1:0000:0000:020e:1eff:fe50:c5b0
GID[ 3]:
2001:0db2:0000:0000:020e:1eff:fe50:c5b0
GID[ 4]:
0000:0000:0000:0000:0000:ffff:c0a8:0b03 IP address for VLAN interface
GID[ 5]:
fe80:0000:0000:0000:020e:1e00:0350:c5b0 VLAN ID 3
The default GID value is zero (0) for back-to-back/Pause settings. For
server/switch configurations, you must identify the proper GID Value. If you
are using a switch, refer to the corresponding switch configuration
documents for the proper settings.
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