Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 608

www.dell.com | support.dell.com • Configuring Spanning Trees as Hitless on page 713 • SNMP Traps for Root Elections and Topology Changes on page 616 • Fast Hellos for Link State Detection on page 616 • Flush MAC Addresses after a Topology Change on page 435 Important Points to Remember • RSTP is disabled by default. • FTOS supports only one Rapid Spanning Tree (RST) instance. • All interfaces in VLANs and all enabled interfaces in Layer 2 mode are automatically added to the RST topology. • Avoid using the range command to add a large group of ports to a large group of VLANs; adding a group of ports to a range of VLANs sends multiple messages to the RSTP task. When using the range command, Dell Force10 recommends limiting the range to 5 ports and 40 VLANs. Configure Interfaces for Layer 2 Mode All interfaces on all bridges that will participate in Rapid Spanning Tree must be in Layer 2 and enabled. Figure 34-1. Configuring Interfaces for Layer 2 Mode R1(conf)# int range gi 1/1 - 4 R1(conf-if-gi-1/1-4)# switchport R1(conf-if-gi-1/1-4)# no shutdown R1(conf-if-gi-1/1-4)#show config ! interface GigabitEthernet 1/1 no ip address switchport no shutdown ! interface GigabitEthernet 1/2 no ip address switchport no shutdown ! interface GigabitEthernet 1/3 no ip address switchport no shutdown ! interface GigabitEthernet 1/4 no ip address switchport no shutdown R1 1/3 1/4 1/1 1/2 3/1 3/2 3/3 3/4 R3 R2 2/1 2/2 2/3 2/4 608 | Rapid Spanning Tree Protocol