I agree with this approach. And even with priority=0, we can always get an old 1900/2900XL/3500XL breaking our STP design :)
Regards, Antonio Soares, CCIE #18473 (R&S) [email protected] _____ From: Bryan Bartik [mailto:[email protected]] Sent: sexta-feira, 8 de Maio de 2009 15:18 To: Antonio Soares Cc: [email protected] Subject: Re: [OSL | CCIE_SP] Vol 1 - Section 3 - Task 3.4 Hi Antonio, In a real world, 0 would be the best to ensure it is root. But the task just says make it root and tells you the number of bridges to hint (not very subtly) at the macro + diameter command. I think this would fall in the category of "just enough to get the task done." I also think about verification, how would your solution be verified? If it is done with a "show spanning-tree" or sho run" it would not matter what the priority is as long as the switch was root and you had the macro set the timers. That being said, I don't think setting it to 0 should count against you. But I'm not the grader :-) Bryan Bartik CCIE #23707, CCNP Sr. Support Engineer - IPexpert, Inc. URL: http://www.IPexpert.com On Fri, May 8, 2009 at 5:02 AM, Antonio Soares <[email protected]> wrote: When try to define the root bridge, i like to set the priority to zero. But in this task we need the "spanning-tree vlan x root primary diameter" macro command to define the STP timers automatically. So my preferred solution would be: Cat1(config)#spanning-tree vlan 541 root primary diameter 5 % This switch is already the root of VLAN541 spanning tree VLAN 541 bridge priority set to 8192 VLAN 541 bridge max aging time set to 16 VLAN 541 bridge hello time unchanged at 2 VLAN 541 bridge forward delay set to 12 Cat1(config)# Cat1(config)# Cat1(config)#do sh runn | inc spanning-tree vlan 541 spanning-tree vlan 541 forward-time 12 spanning-tree vlan 541 max-age 16 spanning-tree vlan 541 priority 8192 Cat1(config)# Cat1(config)# Cat1(config)#spanning-tree vlan 541 priority 0 Cat1(config)# Cat1(config)#do sh runn | inc spanning-tree vlan 541 spanning-tree vlan 541 forward-time 12 spanning-tree vlan 541 max-age 16 spanning-tree vlan 541 priority 0 Cat1(config)# Any comments ? Regards, Antonio Soares, CCIE #18473 (R&S) [email protected] --
