Dear MO, Thank you very much for your response. Yes, I followed the sample to set up the routers but don’t why the peering session between them is not established. Rae From: mo@linx.net <mo@linx.net> Sent: Monday, June 4, 2018 4:40 PM To: Rae Ho (ITSC) <raeho@cuhk.edu.hk> Cc: bird-users@network.cz Subject: Re: BIRD router/route server functions On 4 Jun 2018, at 07:08, Rae Ho (ITSC) <raeho@cuhk.edu.hk<mailto:raeho@cuhk.edu.hk>> wrote: Dear All, I’m Rae of CUHK. We are exploring BIRD router/route server functions. Now I set up 2 BIRD routers to from BGP session between them, seems It can’t form the peering (in active status). Questions: 1. Is there any pre-config need to be set up? (i.e. interface? Internal Subnet?) 2. Would you mind sending me some sample configurations? Rae Try looking here. https://gitlab.labs.nic.cz/labs/bird/wikis/Examples Mo