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--- aruba_networks:switch:6400:6400_configuration_example_script [2025/09/12 08:32] – aperez
+++ aruba_networks:switch:6400:6400_configuration_example_script [2025/11/20 12:18] (current) – aperez
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     area 0.0.0.0
+</code>
+----
+----
+====== MSTP Configuration on Aruba CX 6300 ======
+This document explains the recommended MSTP configuration for Aruba CX switches
+and the differences between STP, RSTP, PVST/RPVST, and MSTP.
+A full configuration block is also provided.
+----
+===== 1. Overview of Spanning Tree Protocol Types =====
+==== ► STP (802.1D – Spanning Tree Protocol) ====
+  * The original spanning tree protocol.
+  * Very slow convergence (30–50 seconds).
+  * Not recommended for modern networks.
+==== ► RSTP (802.1w – Rapid Spanning Tree Protocol) ====
+  * Faster version of classic STP.
+  * Still uses a **single instance** for all VLANs.
+  * Suitable only for small or simple environments.
+==== ► PVST / RPVST (Per-VLAN STP – Cisco-style) ====
+  * Creates one STP instance **per VLAN**.
+  * High control, but heavy CPU/memory usage.
+  * On Aruba CX, RPVST exists only as a **compatibility mode**.
+  * Not recommended for large environments or VSX cores.
+==== ► MSTP (802.1s – Multiple Spanning Tree Protocol) ====
+  * Maps multiple VLANs into a small number of **MST Instances (MSTI)**.
+  * Scales extremely well.
+  * Fully supported and recommended on Aruba CX.
+  * Required for best performance with VSX.
+  * Supports load-balancing per MST instance.
+----
+===== 2. Recommended Design =====
+For Aruba CX 6300/6400 networks:
+  * Always use **MSTP**.
+  * Use **one common MST Region** (same name and revision).
+  * Group VLANs into 2–5 MST instances.
+  * Avoid PVST/RPVST unless required for interoperability with legacy devices.
+  * Keep MST region configuration identical on all switches.
+----
+====== 3. MSTP Configuration Block (Aruba CX 6300) ======
+Below is the complete MSTP configuration including region definition, cleanup of PVST/RPVST lines, VLAN-to-MSTI mapping, and priority settings.
+<code>
+conf t
+!
+! --- Enable MSTP and define the MST Region ---
+spanning-tree mode mstp
+spanning-tree config-name NET-MSTP
+spanning-tree config-revision 1
+!
+! --- Remove old PVST/RPVST configuration for the following VLANs ---
+no spanning-tree vlan 1,700-732,1019,1042
+!
+! --- Map VLANs into MST Instances ---
+spanning-tree instance 1 vlan 700-709
+spanning-tree instance 2 vlan 710-719
+spanning-tree instance 3 vlan 720-729
+spanning-tree instance 4 vlan 730-736
+!
+! Note: VLANs 1, 1019, and 1042 remain in MSTI 0 (CIST)
+!
+! --- Priority settings (choose where the root should be) ---
+spanning-tree priority 5                ! CIST (MSTI0) root priority
+spanning-tree instance 4 priority 5     ! Root for VLANs 730–736 (includes 735/736)
+!
+end
+write mem
 </code>
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 {{pdfjs 46em >:cisco:switch:9500:mtu_utm_switch_6400_9500.pdf }}
 ----
 ----
+{{ :aruba_networks:switch:6400:mtu_utm_switch_6400_9500_en.pdf |}}
+{{pdfjs 46em >:aruba_networks:switch:6400:mtu_utm_switch_6400_9500_en.pdf }}
+----
+----
+{{ :aruba_networks:switch:6400:mtu_pmtu.pdf |}}
+{{pdfjs 46em >:aruba_networks:switch:6400:mtu_pmtu.pdf }}
+----
+----
+{{ :aruba_networks:switch:6400:mstp_pvst_en.pdf |}}
+{{pdfjs 46em >:aruba_networks:switch:6400:mstp_pvst_en.pdf }}
+----
+----
+{{ :aruba_networks:switch:6400:hvac-acl_ospf_sp.pdf |}}
+{{pdfjs 46em >:aruba_networks:switch:6400:hvac-acl_ospf_sp.pdf }}
+----
+----
+{{ :aruba_networks:switch:6400:hvac-acl_ospf_en.pdf |}}
+{{pdfjs 46em >:aruba_networks:switch:6400:hvac-acl_ospf_en.pdf }}
+----
+----