---
name: "ibtopodiff"
section: "1"
platform: "linux"
package: "ibutils"
version: "1.5.7+0.2.gbd7e502-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ibtopodiff"
---

# ibtopodiff(1)

Fabric Topology Matcher

## NAME

ibtoopdiff - Fabric Topology Matcher

## SYNOPSYS

ibtopodiff \[-v\]\[-h\] -t \<topo file\> -d \<subnet file\> -s \<start node name\>\
   \-p \<start port num\> -g \<start port guid\>

## DESCRIPTION

This utility performs matching between a given topology file (see man **ibdm-topology-file**) and a **subnet.lst file** (this file provides a dump of all links in the discovered fabric and generated by ibdiagnet or OpenSM).

## ARGUMENTS

- \-t\|--topology \<file\>

  Topology file. See man **ibdm-topology-file** for its definition.

- \-d\|--discovered \<file\>

  subnet.lst file produced by **OpenSM** or **ibdiagnet**

- \-s\|--start-node \<name\>

  The name of the matching start node, also known as anchor node. E.g. H-1/U1

- \-p\|--port-num \<num\>

  The number of the matching start port, also known as anchor port

- \-g\|--port-guid \<guid\>

  The guid of the matching start port

## OPTIONS

- \-v\|--verbose

  Verbsoe mode

- \-h\|--help

  Provides this help message

## AUTHOR

Eitan Zahavi, Mellanox Technologies LTD, eitan@mellanox.co.il