Dell Force10 Z9000 FTOS Configuration Guide for Z9000 System - Page 710

www.dell.com | support.dell.com FTOS supports three other variations of Spanning Tree, as shown in Table 34-1. Table 34-1. FTOS Supported Spanning Tree Protocols Dell Force10Term Spanning Tree Protocol (STP) Rapid Spanning Tree Protocol (RSTP) Multiple Spanning Tree Protocol (MSTP) Per-VLAN Spanning Tree Plus (PVST+) IEEE Specification 802.1d 802.1w 802.1s Third Party Implementation Information • The FTOS implementation of PVST+ is based on IEEE Standard 802.1d. • The FTOS implementation of PVST+ uses IEEE 802.1s costs as the default costs (Table 34-2). Other implementations use IEEE 802.1d costs as the default costs if you are using Dell Force10 systems in a multi-vendor network, verify that the costs are values you intended. • You must allocate at least the default minimum amount of Layer 2 ACL CAM space when employing PVST+ on the E-Series. See Configure Ingress Layer 2 ACL Sub-partitions on page 273. • On the C-Series and S-Series, you can enable PVST+ on 254 VLANs. Configure Per-VLAN Spanning Tree Plus Configuring PVST+ is a four-step process: 1. Configure interfaces for Layer 2. 2. Place the interfaces in VLANs. 3. Enable PVST+. See page 711. 4. Optionally, for load balancing, select a non-default bridge-priority for a VLAN. See page 711. Related Configuration Tasks • Modify Global PVST+ Parameters on page 713 • Modify Interface PVST+ Parameters on page 714 • Configure an EdgePort on page 715 • Flush MAC Addresses after a Topology Change on page 599 • Preventing Network Disruptions with BPDU Guard on page 883 • SNMP Traps for Root Elections and Topology Changes on page 886 • Configuring Spanning Trees as Hitless on page 886 710 | Per-VLAN Spanning Tree Plus (PVST+)