Category: cisco
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Cisco Live San Diego distilled
Cisco Live 2025 San Diego, which I had the pleasure of attending, can be distilled into Observability and Agentic AI, which, in the context of Cisco, are both closely related to the acquisition of Splunk. Cloud native systems, like Netflix, have a distributed and complex architecture consisting of hundreds of microservices at a global scale.…
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Legacy SSH key exchange workaround
Cisco switches sometimes last longer than their cryptographic algorithms. You can fix this by purchasing a new switch (dah) or by enabling the old, and most likely weak, key exchange algorithm for the affected hosts in ~/.ssh/config. If that didn’t help and you get something like this: Then, the simplest workaround is to globally enable…
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Cisco Catalyst slow SCP fix
Cisco released the following command in IOS-XE 17.2.6. This essentially increases the window-size for SCP which allows for more throughput – and it is very noticeable: an IOS-XE image is around 1.2 GB, and this new command makes SCP go from hours to minutes. Here is an Ansible example showing how to utilize this new…