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Asfandyar70754
Beginner

VXLAN in SD Access

Hey guys,

I have been trying to study SD Access and I am a bit confused in VXLAN. I know VXLAN tunnels L2 traffic over L3 infrastructure, so I get it why it is good in DC/ACI, because of vMotion. But in Campus network how it is beneficial, specially when most of the users use wireless now a days. 

1 REPLY 1
jalejand
Cisco Employee

1) VXLAN helps to carry SGT tags to enforce TrustSec in SDA

2) L2 Extension over L3 is needed for seamless wireless roaming in SDA , wireless clients are not tunneled to WLCs, instead, these are sent over the wire just like FlexConnect but using VXLAN between APs and Edges. When roaming between APs in different FEs, L2 extension removes the need of requesting DHCP again, thus reducing delays when roaming.