Configuring RSTP
Most newer Cisco switches use RSTP by default. RSTP prevents frame looping out of the box and no additional configuration is necessary. To check whether a switch runs RSTP, the show spanning-tree command is used:
SW1#show spanning-tree VLAN0001 Spanning tree enabled protocol rstp Root ID Priority 32769 Address 0004.9A47.1039 This bridge is the root Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32769 (priority 32768 sys-id-ext 1) Address 0004.9A47.1039 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 20 Interface Role Sts Cost Prio.Nbr Type ---------------- ---- --- --------- -------- -------------------------------- Fa0/3 Desg FWD 19 128.3 P2p Fa0/2 Desg FWD 19 128.2 P2p
If RSTP is not being used, the following command will enable it:
SW1(config)#spanning-tree mode rapid-pvst
Most other configuration options (electing root switch, selecting root and designated ports) are similar to the ones used in STP.
Prerequisites for 200-301
200-301 is a single exam, consisting of about 120 questions. It covers a wide range of topics, such as routing and switching, security, wireless networking, and even some programming concepts. As with other Cisco certifications, you can take it at any of the Pearson VUE certification centers.
The recommended training program that can be taken at a Cisco academy is called Implementing and Administering Cisco Solutions (CCNA). The successful completion of a training course will get you a training badge.
Full Version 200-301 Dumps