CONFIG_INFINIBAND_IPOIB_CM: IP-over-InfiniBand Connected Mode support

General informations

The Linux kernel configuration item CONFIG_INFINIBAND_IPOIB_CM:

• prompt: IP-over-InfiniBand Connected Mode support
• type: bool
• depends on: CONFIG_INFINIBAND_IPOIB
• defined in drivers/infiniband/ulp/ipoib/Kconfig
• found in Linux kernels: 2.6.21–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

This option enables support for IPoIB connected mode. After enabling this option, you need to switch to connected mode through /sys/class/net/ibXXX/mode to actually create connections, and then increase the interface MTU with e.g. ifconfig ib0 mtu 65520.

WARNING: Enabling connected mode will trigger some packet drops for multicast and UD mode traffic from this interface, unless you limit mtu for these destinations to 2044.

Hardware

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The data is retrived from:

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