IBCCCONFIG(8)

✨ NAME ✨

ibccconfig — configure congestion control settings 💅

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🌸 SYNOPSIS 🌸

ibccconfig [common_options] [-c cckey] <op> <lid|guid> [port]

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🦋 DESCRIPTION 🦋

okay so bestie, ibccconfig is your girl for setting up congestion control stuff — specifically on switches and HCAs. that's the whole job. that's the vibe. 💖

⚠️ WARNING — bestie, you gotta actually understand what you're doing before you run this. Misuse of this tool could result in a broken fabric. like, actually broken. not cute. 😭

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👑 OPTIONS 👑

Current supported operations and their parameters, slay:

• CongestionKeyInfo (CK) — <lid|guid> <cckey> <cckeyprotectbit> <cckeyleaseperiod> <cckeyviolations>
• SwitchCongestionSetting (SS) — <lid|guid> <controlmap> <victimmask> <creditmask> <threshold> <packetsize> <csthreshold> <csreturndelay> <markingrate>
• SwitchPortCongestionSetting (SP) — <lid|guid> <portnum> <valid> <control_type> <threshold> <packet_size> <cong_parm_marking_rate>
• CACongestionSetting (CS) — <lid|guid> <port_control> <control_map> <ccti_timer> <ccti_increase> <trigger_threshold> <ccti_min>
• CongestionControlTable (CT) — <lid|guid> <cctilimit> <index> <cctentry> <cctentry> ...
• --cckey, -c, <cckey> — specify a congestion control (CC) key. If you don't give one, a key of 0 gets used. default queen behavior. 🎀

🐛 Debugging flags

• -d — raises the IB debugging level. can be used several times (-ddd or -d -d -d). go feral.
• -e — show send and receive errors (timeouts and others). we love a lil visibility.
• -h, --help — show the usage message.
• -v, --verbose — increases the application verbosity level. may be used several times (-vv or -v -v -v). yap mode activated 💬
• -V, --version — show the version info.

🌈 Addressing Flags

• -G, --Guid — the address specified is a Port GUID.
• -L, --Lid — the address specified is a LID.
• -s, --sm_port <smlid> — use smlid as the target lid for SA queries.

🎀 Port Selection flags

• -C, --Ca <ca_name> — use the specified ca_name.
• -P, --Port <ca_port> — use the specified ca_port.
• -Y, --pkey-idx <idx> — P_Key table index (0-65535, default 0) used for the outgoing SA/GMP MADs. heads up though: SMP (SMI directed-route/LID-routed) MADs always use P_Key index 0. no exceptions, periodt.

💜 Local port Selection

Multiple port / Multiple CA support, bestie: when no IB device or port is specified (peep the "local umad parameters" below 👇), the libibumad library picks the port to use by these criteria:

1. the first port that is ACTIVE.
2. if not found, the first port that is UP (physical link up).

If a port and/or CA name is specified, the libibumad library attempts to fulfill the user request, and will fail if it is not possible. it said what it said. 💅

For example:

ibaddr                 # use the first port (criteria #1 above)
ibaddr -C mthca1       # pick the best port from "mthca1" only.
ibaddr -P 2            # use the second (active/up) port from the first available IB device.
ibaddr -C mthca0 -P 2  # use the specified port only.

🧚 Configuration flags

• -y, --m_key <key> — use the specified M_key for requests. If a non-numeric value (like x) is specified then a value will be prompted for. spicy. 🌶️
• --config, -z <config_file> — specify alternate config file.

Default: /etc/infiniband-diags/ibdiag.conf

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🔥 EXAMPLES 🔥

here's the good stuff, copy-paste royalty:

ibccconfig SwitchCongestionSetting 2 0x1F 0x1FFFFFFFFF 0x0 0xF 8 0 0:0 1  # Configure Switch Congestion Settings
ibccconfig CACongestionSetting 1 0 0x3 150 1 0 0                          # Configure CA Congestion Settings to SL 0 and SL 1
ibccconfig CACongestionSetting 1 0 0x4 200 1 0 0                          # Configure CA Congestion Settings to SL 2
ibccconfig CongestionControlTable 1 63 0 0:0 0:1 ...                      # Configure first block of Congestion Control Table
ibccconfig CongestionControlTable 1 127 0 0:64 0:65 ...                   # Configure second block of Congestion Control Table

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🍓 FILES 🍓

📁 CONFIG FILE

/etc/infiniband-diags/ibdiag.conf

A global config file is provided to set some of the common options for all tools. See supplied config file for details. iykyk 💖

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🌟 AUTHOR 🌟

Albert Chu

<chu11@llnl.gov>

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okok that's the whole thing, you're literally so set bestie 🫶💖 this was OpenIB Diagnostics IBCCCONFIG(8), dated 2012-05-31 — iconic since day one, no cap. go configure responsibly 👑✨