---
name: "smpdump"
section: "8"
platform: "linux"
package: "rdma-core"
version: "65.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/smpdump"
---

# smpdump(8)

dump InfiniBand subnet management attributes

## Name

smpdump - dump InfiniBand subnet management attributes

## SYNOPSIS

smpdump \[options\] \<dlid\|dr\_path\> \<attribute\> \[attribute\_modifier\]

## DESCRIPTION

smpdump is a general purpose SMP utility which gets SM attributes from a specified SMA. The result is dumped in hex by default.

## OPTIONS

- **dlid\|drpath**

  LID or DR path to SMA

- **attribute**

  IBA attribute ID for SM attribute

- **attribute\_modifier**

  IBA modifier for SM attribute

- **-s, --string**

  Print strings in packet if possible

### Addressing Flags

**-D, --Direct**     The address specified is a directed route

```
Examples:
   [options] -D [options] "0"          # self port
   [options] -D [options] "0,1,2,1,4"  # out via port 1, then 2, ...
   (Note the second number in the path specified must match the port being
   used.  This can be specified using the port selection flag '-P' or the
   port found through the automatic selection process.)
```

**-L, --Lid**   The address specified is a LID

### 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. SMP (SMI directed-route/LID-routed) MADs always use P\_Key index 0.

### Local port Selection

Multiple port/Multiple CA support: when no IB device or port is specified (see the "local umad parameters" below), the libibumad library selects the port to use by the following 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.

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.
```

### Debugging flags

- **-d**

  raise the IB debugging level. May be used several times (-ddd or -d -d -d).

- **-e**

  show send and receive errors (timeouts and others)

**-h, --help**      show the usage message

- **-v, --verbose**

  increase the application verbosity level. May be used several times (-vv or -v -v -v)

**-V, --version**     show the version info.

### Configuration flags

**-t, --timeout \<timeout\_ms\>** override the default timeout for the solicited mads.

**--config, -z  \<config\_file\>** Specify alternate config file.

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

## 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.

## EXAMPLES

Direct Routed Examples

```
smpdump -D 0,1,2,3,5 16 # NODE DESC
smpdump -D 0,1,2 0x15 2 # PORT INFO, port 2
```

LID Routed Examples

```
smpdump 3 0x15 2        # PORT INFO, lid 3 port 2
smpdump 0xa0 0x11       # NODE INFO, lid 0xa0
```

## SEE ALSO

smpquery (8)

## AUTHOR

- **Hal Rosenstock**

  \< \<halr@voltaire.com\> \>