The ramblings of a computer geek
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 … Read more
The following can get the errors out for a particular interface (port), in this case we are looking for the InErrors (RXErrors) and OutErrors (TXErrors). For example ID: Only issue i’ve found is that interface errors in VOSS/FabricEngine seem to include RX or TX errors plus annoyingly things like oversized packets. So if you have … Read more
SNMP (Simple Network Management Protocol) is a protocol that can be used for monitoring and managing network connected devices. Personally I use it primarily for monitoring, it is a useful way to interrogate network connected devices for information about their status. For example querying to identify if a power supply has failed on a switch, … Read more
The capture of network traffic can be useful in troubleshooting issues. Although it is possible to complete this on the switch itself your milage may vary. You require a machine with some packet capture software running and listening on the relevant network interface. XOS In this example we’ll be mirroring port 1 to port 10, … Read more
If you need to reboot a switch at a specific time, you can! Can be helpful for if you were performing a potentially disruptive configuration (where you might get cut off), you can set it to reboot after a specific period of time after you’re going to perform the configuration. Then if the configuration goes … Read more
We’ve recently started to move to an Extreme Networks VOSS Fabric based network, however due to the scale, we can’t change everything attached to it to work more seamlessly with the VOSS fabric based network operation. We have a large number of hosts for example that use Active-Backup bonding on their NICs when connecting to … Read more
If you need to perform a packet capture you can use the following below to get this exported to a PCAP file you can then open in WireShark. You can then TFTP off the file with the following: I normally use TFTP32/64 on the machine to which i’m TFTPing, but this has had problems recently. … Read more
During some upcoming changes I needed to test a mobile application to use a test IP address for a standard hostname. Problem is, I didn’t want to root my Android phone to be able edit the hosts file. There are apps such as “Hosts Go”, but in my case these didn’t work. On a normal … Read more
At about 15:00 on 1st November 2022, my FTTP broadband disconnected. Upon looking at the BT Openreach ONT, I saw the following light condition. Power Green (Solid) LOS (Loss of Service) Red (Solid) PON Off LAN Green (Solid with blinking occasionally) Unfortunately I don’t have a video or picture of this state, but needless to … Read more
Moniting with SNMPv3 is much like monitoring with SNMPv2 or 1 for that matter, except SNMPv3 offers greater security options. SNMPv1 or v2 offers very little security being based on a plain text community string, of course on the monitored device you can restrict which hosts are allowed to connect to your monitored device via … Read more