Differences

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--- faq:network_troubleshooting [2020/03/30 11:29 (4 years ago)] – kevin
+++ faq:network_troubleshooting [2020/04/01 12:16 (4 years ago)] – [Things to consider when things go wrong] tanya
@@ Line 20: / Line 20: @@
   * Incorrectly crimped cables (Even store-bought cables can fail and mice will eat working ones and they will still operate some of the time)
   * Poorly routed cables (Don’t run parallel with power wires as magnetic fields will cause corruption)
+  * A switching loop or bridge loop in the network. (e.g. multiple connections between two network switches or two ports on the same switch connected to each other).
   * Network cards that randomly fail but work most of the time (Poorly crafted operating system drivers can cause this type of issue as well)
   * Other environmental considerations (Newly installed welders, air conditioners, or other power-hungry devices in the same building (even outside the company) can cause power brownouts which can cause pieces of equipment to fail during startup of the power-hungry device)  Install a UPS and if it is beeping every few minutes, you may have a power issue.
@@ Line 26: / Line 27: @@
   * Are you using Voice over IP phones on the same network as your data?  The best networking practice would be to configure a separate VLAN for phone traffic to allow the data network to communicate without competing with packet priority over voice data.
   * Is there any third-party software installed such as State or Provincial level tools that could impact VPN or network access?
-  * Have you swapped internet providers and left old DNS information hardcoded on workstations?  This can be overlooked and can cause 30-second timeout delays while DNS fails over to a working DNS server.
+  * Have you swapped internet providers and left old DNS information hardcoded on workstations?  This can be overlooked and can cause 30-second timeout delays while DNS fails over to a working DNS server.  Due to the round-robin and caching nature of DNS, System Five will work sometimes and have a long delay at othertimes.