Find my comments in red. Thanks Regards, Janvier R. From: Bird-users [mailto:bird-users-bounces@network.cz] On Behalf Of Jonathan Stewart Sent: Thursday, August 3, 2017 4:06 PM To: Ajai Kumar <joinajay1@gmail.com> Cc: bird <bird-users@network.cz> Subject: Re: Hold time expired error If you cannot ping across your IX, you need to look lower than BIRD to figure out the problem. I can ping the IP through IX I would try to answer questions like: Is ARP resolving IPs to MACs? Yes ARP is resolving IPs to MACS Is the problem isolated to a single BIRD server only? Yes the problem occurs now on new one I am installing, the other BIRD installed later are working properly Is it only IPv4 problem only, Yes it is an IPv4 problem, or IPv6 as well? If you can answer some of these questions, you'll get closer to finding the root cause, I expect. Cheers, Jonathan On Thu, Aug 3, 2017 at 2:25 AM, Ajai Kumar <joinajay1@gmail.com <mailto:joinajay1@gmail.com> > wrote: Dear All, We are facing problem with few peers in our IX. Frequently they get Hold Timer Expired Error and they are not able to ping our route server IP. After shut no shut this problem resolves for sometime. One log message appended bgp_hold_timeout:4690: NOTIFICATION sent to X.X.X.X (External AS 132953): code 4 (Hold Timer Expired Error), Reason: holdtime expired for X.X.X.X (External AS 132953), socket buffer sndcc: 57 rcvcc: 0 TCP state: 4, snd_una: 728368567 snd_nxt: 728368624 snd_wnd: 15744 rcv_nxt: 429172199 rcv_adv: 429188583, hold timer out 90s, hold timer remain 0s Requesting for help pls. Regards, Ajai Kumar -- (M) +91-9868477444 <tel:+91%2098684%2077444> Skype ID:erajay P-mail: joinajay1 at gmail.com <http://gmail.com> ................................. Please don't print this email unless you really need to. This will preserve trees on our planet. -- Jonathan