What precautions should we take when we transit legacy network to SDWAN network ? how can we do it in minimal downtime ?how can we replace devices in minimal downtime in LAN network /DC network /WAN network ? precautions 

Nexus switches routing table is different in look rather than normal cisco routers and switches so please explain process to read that 

as per my understanding ---stateful firewall means the device who keeps track record of flow from source to destination.and such firewall allow reverse flow i.e. destination to source if it is in its record so please explain in simple about this work...

today I have seen maximum path 2 under bgp so why do we put this command ?Please explain

 on Data center router ,we have 6 VRF and let say we have subnet 10.x.x.x/18  and this subnet route is seen in all 6 vrf on that Data center routeris it possible ?as i learnt that VRF creates separate routing table then how can we see one subnet rout...