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Linux Networking Systems Administration

A script to bring Cisco Switch VLAN data into phpIPAM

We have recently set up an IPAM at my workplace, the excellent phpIPAM – https://phpipam.net/ I went through our install and added all our subnets into the IPAM, but to make the data much more useful we wanted to have the VLAN information also: However, I didn’t want to go through by hand, adding each […]

Categories
Linux Networking Systems Administration

Workaround for SSH error to Cisco switch from Ubuntu 20.04 – no matching key exchange method found

Trying to SSH to a Cisco switch from Ubuntu 20.04 you may get this error: This error is because Ubuntu 20.04 has disabled the SHA1-based key exchange methods after some attacks have been found on SHA1. To work around this issue for Cisco switches you can use the command line argument -oKexAlgorithms=+diffie-hellman-group1-sha1 like this: To […]