Archive | Networks

20 January 2012 ~ Comments Off

OpenBSD PPPoE and RFC 4638

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 [...]

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29 April 2011 ~ Comments Off

Using SNMP to upgrade IOS on Cisco devices

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 [...]

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24 April 2011 ~ Comments Off

Using SNMP to trigger Cisco TFTP backups

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 [...]

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