Hi Derek,

There shouldn't be any issues with replacing a device, discovery should remove old interfaces and add new ones. I'm not sure why you saw what you saw, that isn't expected behaviour!

Though, my preferred way of handling forklift hardware replacements is to disable and rename the old device to something like "router01-old" and adding the new one as "router01". This way you get unmolested historical data on the old device for as long as it's useful, and no odd things hanging around on the new device.

adam.

Sent from Mailbird [http://www.getmailbird.com/?utm_source=Mailbird&utm_medium=email&utm...] On 09/06/2016 17:42:04, Derek dandenoth@gmail.com wrote: So, I had a question regarding hardware replacement. I recently replaced several Cisco 2811 routers with Cisco ISR 4331's, and kept the same host name. After the swap, I noticed I wasn't getting any graphs for data flow on the serial interfaces. I attempted running discovery on them again, and waited for a few polling cycles, but still go no data. In the end, I ended up deleting the devices completely out of Observium, including the RRD files, and re-adding. After this was done, everything showed up correctly.

So, as I will be doing more of these soon, is there a specific process I should follow for these? Maybe rename the old device to a different hostname, then add the new device? The historical data wasn't critical, so I'm not too bothered losing it, but I would like to avoid it if possible.

Thanks,

Derek

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