Hello team,

I want to install FRR on an Ubuntu 18.04 server and I receive this error when I try to use this procedure (https://deb.frrouting.org/) :

# add GPG key
curl -s https://deb.frrouting.org/frr/keys.asc | sudo apt-key add -
 
# possible values for FRRVER: frr-6 frr-7 frr-8 frr-stable
# frr-stable will be the latest official stable release
FRRVER="frr-stable"
echo deb https://deb.frrouting.org/frr $(lsb_release -s -c) $FRRVER | sudo tee -a /etc/apt/sources.list.d/frr.list
 
# update and install FRR
sudo apt update && sudo apt install frr frr-pythontools

root@ukr1:~# curl -s https://deb.frrouting.org/frr/keys.asc | sudo apt-key add -

OK

root@ukr1:~# FRRVER="frr-stable"

root@ukr1:~# echo deb https://deb.frrouting.org/frr $(lsb_release -s -c) $FRRVER | sudo tee -a /etc/apt/sources.list.d/frr.list

deb https://deb.frrouting.org/frr bionic frr-stable

root@ukr1:~# sudo apt update && sudo apt install frr frr-pythontools

Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]

Hit:2 http://us.archive.ubuntu.com/ubuntu bionic InRelease

Ign:3 https://deb.frrouting.org/frr bionic InRelease

Get:4 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]

Err:5 https://deb.frrouting.org/frr bionic Release

  Certificate verification failed: The certificate is NOT trusted. The certificate chain uses expired certificate.  Could not handshake: Error in the certificate verification. [IP: 194.147.138.41 443]

Get:6 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]

Reading package lists... Done

E: The repository 'https://deb.frrouting.org/frr bionic Release' does not have a Release file.

N: Updating from such a repository can't be done securely, and is therefore disabled by default.

N: See apt-secure(8) manpage for repository creation and user configuration details.

Is there something you can fix ?

Thanks,

Eduard