BGP to ISP weird behavior

[Bekzod Fakhriddinov]

Hi guys. I had to move recently our circuit from one ISP to another , both running BGP and had some issue could not figure it out . In router  BGP, ACLs, route-maps , NATs- I changed only IPs from old to new , so in most case scenario it should work .

I can ping neighbor but I can't ping other public IPs , AS numbers on both sides are correct,  show ip route neighbor ip =known via static , show ip bgp summary = i see neighbor but state/pfxrcd=0;  show ip bgp neighbor x.x.x.x = shows bgp state  established  ; show ip bgp : my network x.x.x.x      next hop 0.0.0.0     ; debug bgp ip : open active, then open failed , connection refused by remote host ;

i have 3 static ip routes : default trough bgp_neighbor, and 2 to my dmvpn servers, and maybe because of those static routes i can ping my dmvpn servers public ip .

I'm confused where to dig... ISP router is juniper which i dont know ...

[Bekzod Fakhriddinov]

looks like solved :)  . I had ip route x.x.x.x x.x.x.x track 1 , and ip sla icmp echo to 8.8.8.8 .

i deleted that track and problem disappear , I changed icmp-echo to ip of BGP_neghbor_my next hop ip , and put back track , everything is working .

so we had self-made loop, track is tracking status of route by pinging 8.8.8.8 , but router know only default route to 8.8.8.8 which has that track / doesn't have route to 8.8.8.8 in routing table---> no ip route to Internet .

It's difficult to troubleshoot somebody's configuration :) . I hope it will be helpful .