I upgraded my Internet connection from ADSL 2+ to FTTC a while ago. I’m with Eclipse as an ISP, but it’s basically the same product as BT Infinity, right down to the Openreach-branded modem, (a Huawei Echolife HG612 to be exact). With this modem, you need to use a router or some software that can [...]
Justin Kulesza and I have been using Puppet to manage the configuration of some virtualized servers. Recently, we added some modules that introduced unexpected dependency cycles. As we worked to untangle the complex series of dependencies, it became difficult to keep track of just how everything was connected. In order to make sense of the…
Following on from my previous post regarding using SNMP to initiate TFTP backups, it’s also possible to use SNMP to remotely upgrade IOS on a Cisco device. I’ll reuse and extend the setup and configuration from the previous article so apply that first. The IOS device then needs the following additions: router(config)#snmp-server view myview ciscoFlashOps [...]
I recently discovered you can use SNMP to trigger a Cisco device to write its configuration to a remote TFTP server. Apparently this feature has existed in Cisco devices in one form or another for over a decade, but somehow I’d missed it completely. This seems a far better alternative to getting in a muddle [...]
