Improve specification with mention of BESS-UPF
Additionally adding BESS-UPF page in advanced feature, poiting to Aether doc for now.
Change-Id: I93efcb78359fbc0980d995014dc75030bfcd5019
diff --git a/architecture.rst b/architecture.rst
index f44a264..c62f132 100644
--- a/architecture.rst
+++ b/architecture.rst
@@ -121,7 +121,9 @@
applications that is multi-terabit and low-latency, without taking away CPU processing power for
containers or VMs. In contrast to UPF solutions based on full or partial smartNIC offload,
SD-Fabric's embedded UPF does not require additional hardware other than the same leaf and spine
-switches used to interconnect servers and base stations. At the same time, SD-Fabric can be
+switches used to interconnect servers and base stations.
+
+At the same time, SD-Fabric can be
integrated with both CPU-based or smartNIC-based UPFs to improve scale while supporting
differentiated services on a hardware-based fast-path at line rate for mission critical 4G/5G
applications (see https://opennetworking.org/sd-core/ for more details).