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--- wiki:nmcli_network_tool [2021/05/06 14:11] – created walkeradmin
+++ wiki:nmcli_network_tool [2023/03/09 22:35] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-nmcli Network Tool
+====== nmcli Network Tool ======
+<color darkorange>May 2021</color>
+\\
+==== Overview ====
+----
+A customer had made lots of changes to the network interfaces on a unit and was having a lot of issues, performing an <color #ed1c24>ip a</color> displayed the interface names and IP addresses, and this looked normal.
+\\
+\\
+However, using the nmcli tool told a slightly different story.
+\\
+\\
+----
+==== nmcli ====
+While nmcli may have many uses, I want to focus on just one. This is not a how to fix your network, this is just highlighting a good use  for nmcli. Running nmcli displayed the following output:
+\\
+\\
+<file>
+nmcli  con
+NAME  UUID                                  TYPE      DEVICE
+eth0  d9ced338-a402-60eb-c131-0fd3ab4b5ab7  ethernet  eth5
+eth1  84d43311-57c8-8986-f205-9c78cd6ef5d2  ethernet  eth4
+eth2  ee7189fe-a32a-4873-bf26-145d4e19a51d  ethernet  eth0
+eth4  3a73717e-65ab-93e8-b518-24f5af32dc0d  ethernet  eth1
+eth5  841334f5-7d18-33f9-86f1-84cee61678a0  ethernet  eth3
+eth3  c5ca8081-6db2-4602-4b46-d771f4330a6d  ethernet  --
+</file>
+If you look at the above output, you can see that the <color #ed1c24>NAME</color> and <color #ed1c24>DEVICE</color> are not aligned. eth0 is listed as device eth5, in fact none of interface names and devices are aligned.
+\\
+\\
+The problem was in the ifcfg-ethx files, and once this was fixed (the eth name and mac address in each file was incorrect).
+\\
+\\
+After fixing this issue, running nmcli again gave the following output:
+\\
+<file>
+nmcli  con
+NAME  UUID                                  TYPE      DEVICE
+eth0  d9ced338-a402-60eb-c131-0fd3ab4b5ab7  ethernet  eth5
+eth1  84d43311-57c8-8986-f205-9c78cd6ef5d2  ethernet  eth4
+eth2  ee7189fe-a32a-4873-bf26-145d4e19a51d  ethernet  eth0
+eth4  3a73717e-65ab-93e8-b518-24f5af32dc0d  ethernet  eth1
+eth5  841334f5-7d18-33f9-86f1-84cee61678a0  ethernet  eth3
+eth3  c5ca8081-6db2-4602-4b46-d771f4330a6d  ethernet  --
+</file>
+Now that the <color #ed1c24>NAME</color> and <color #ed1c24>DEVICE</color> are aligned, everything started working.
+\\
+\\