The ramblings of a computer geek
I was attempting to run a Python script on a Extreme Networks EXOS switch, but it didn’t work. The fix was simple, add the following line to the Python script to import the “exsh” module.
More...IPerf is a tool that can be used to measure the bandwidth and quality of a network link. Its a useful little tool, so I’ll introduce some of the basics of how you can use it to perform some tests. Bear in mind this is not an exhaustive guide, there are many tweaks that can […]
More...On VOSS/FabricEngine SLPP should be configured on every VLAN at the point where it leaves the fabric and meets a non-fabric loop prevention strategy. This will prevent any loops from impacting the fabric by closing down ports where a loop is detected. The below assumes you already have SLPP configured on your upstream switches. If […]
More...The concepts of Traffic Policing and Traffic Shaping can get very detailed, this article intends to be a very high level explanation, I’ve provided some links below that go into more detail. But, first let’s set the scene. When transmitting traffic across a network connection, there are limits, the most notable is the limit in […]
More...Attempting to play a multicast stream from Windows VLC Player, was seeing the IGMP Snooping picking up something from my machine, but not the join to the specific group (channel/stream) I was trying to view. I was attempting to get to a stream: udp://@239.4.6.0:1234 Resolution To resolve the problem, it turned out to be VirtualBox, […]
More...The Brocade SAN Switches have SNMP capability which can be used for configuration and monitoring. These instructions detail how to configure SNMP on the SAN switches to allow them to have their state be monitored via SNMP from a suitable monitoring platform (e.g. NagiosXI or Opsview etc.). We are not configuring SNMP Traps, this is […]
More...At the time of writing (29/03/2024) the recommended EXOS (SwitchEngine) version for the X450-g2, X460-g2 and 5420 (as well as other hardware) is EXOS 31.7.2.28-patch1-75. We recently purchased some new 5420 switches and are upgrading some existing X450-g2 and X460-g2 to the latest recommended software versions. However we have identified an issue that currently at […]
More...A trial licence is fine for testing some stuff, but if you need to remove it, for example when it causes you issues in a stack when the master thinks it on perimeter, but the backup is not. Remove Licence (Option 1) https://extreme-networks.my.site.com/ExtrArticleDetail?n=000001267 Remove Licence (Option 2) https://extreme-networks.my.site.com/ExtrArticleDetail?an=000092952 Verify Current Licence Removing Stacking Licence Level
More...You may need to limit bandwidth, perhaps for a customer, or for an area of your network to avoid issues that occur when they saturate links, knowingly or unknowingly. In this example we’ll create a 20MBit Limit with a 250Kb burst, and we’ll make the switch drop anything that exceeds that limit. So in effect […]
More...The Extreme Networks VOSS FabricEngine switches allow for the port partitioning (channelising) of a QSFP28 or QSFP+ port the same as is the case on an Extreme Networks XOS (SwitchEngine) switch. The following example details how this can be completed. The following was used to complete the testing and proof of operation: In this example 100Gbit QSFP28 interface which […]
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