BGP Stability - soft-reconfig
Instead of hammering a session to cause reevaluation (“clear ip bgp” drops the TCP session), “clear ip bgp soft” can be used.
“clear ip bgp x.y.z.q soft out” is low cpu; it issues withdrawls for all currently-advertised routes and recomputes and re-sends roues.
“clear ip bgp x.y.z.q soft in” is high memory, as it needs to keep copy of all routes received.