BGP cannot connect

Simple configuration in GNS3 won’t work. All I get from debug is: went from nsf_not_active to nsf_not_active The solution is quite simple: under BGP process and neighbor statement add “disable-connected-check“

BGP session flapping

my customer is peering with 2 ISP’s and has configuration with 2 BGP routers mutually connected with iBGP. routers are reciving full tables from ISP’s and has 4 byte AS (XXXXXX). recently we noticed that BGP session between customer and ISP2 is constantly flapping each 3 minutes. logs didn’t show anything useful %BGP-4-MSGDUMP: unsupported or mal-formatted