Add Cisco DNA/SCA/ACI pages

index.md

@@ -101,11 +101,14 @@ _(Alphabetically sorted, so the ordering might seem a bit strange.)_
 - [Network Architecture](/networking/architecture/)
 - [BGP](/networking/bgp/)
 - [Brocade FastIron Switches](/networking/brocade-fastiron-switches/)
+- [Cisco Application Centric Infrastructure (ACI)](/networking/cisco-aci/)
+- [Cisco Digital Network Architecture (DNA)](/networking/cisco-dna/)
 - [Cisco General](/networking/cisco-general/)
 - [Cisco Hardware](/networking/cisco-hardware/)
 - [Cisco IOS General](/networking/cisco-ios-general/)
 - [Cisco IOS Routers](/networking/cisco-ios-routers/)
 - [Cisco IOS Switches](/networking/cisco-ios-switches/)
+- [Cisco Software-Defined Access (SDA)](/networking/cisco-sda/)
 - [802.1X & EAP](/networking/dot1x-eap/)
 - [FS FSOS Switches](/networking/fs-fsos-switches/)
 - [General](/networking/general/)

networking/cisco-aci.md

@@ -0,0 +1,25 @@
+---
+title: Cisco Application Centric Infrastructure (ACI)
+breadcrumbs:
+- title: Network
+---
+{% include header.md %}
+
+## General
+
+- A zero-trust platform and network fabric for data centers.
+- Not part of Cisco DNA, but shares certain applications.
+- Uses mainly Nexus switches in a spine-leaf topology.
+- Managed by Application Policy Infrastructure Controller (APIC) (not to be confused with APIC-EM).
+
+### Relation to SDA
+
+- Both are zero-trust platforms/fabrics with VXLAN-based overlays.
+- SDA is part of Cisco DNA, ACI is its own thing.
+- SDA is managed by DNA Center, ACI is managed by APIC.
+- They're compatible for traffic going to/from datacenters (i.e. they share/translate zero trust info).
+- ACI uses mainly Nexus switches while SDA used mainly Catalyst switches.
+
+## Theory
+
+{% include footer.md %}

networking/cisco-dna.md

@@ -0,0 +1,12 @@
+---
+title: Cisco Digital Network Architecture (DNA)
+breadcrumbs:
+- title: Network
+---
+{% include header.md %}
+
+## General
+
+- An overarching platform for Cisco networks, consisting of e.g. DNA Center and SDA (but not e.g. ACI).
+
+{% include footer.md %}

networking/cisco-sda.md

@@ -0,0 +1,22 @@
+---
+title: Cisco Software-Defined Access (SDA)
+breadcrumbs:
+- title: Network
+---
+{% include header.md %}
+
+## General
+
+- A zero-trust network fabric for "user networks" (not DC), part of Cisco DNA (often called DNA/SDA).
+- Uses mainly Catalyst switches (plus WLCs and APs).
+- Managed by DNA Center (DNAC), depends heavily on Identity Services Engine (ISE).
+
+### Relation to ACI
+
+See [Cisco ACI: Relation to SDA](../cisco-aci/#relation-to-sda).
+
+## Theory
+
+**TODO**
+
+{% include footer.md %}