7/26/2023 0 Comments Xstand naximum tree diameter![]() ![]() Also, it may not even require additional hardware. That is the most substantial redo but offers the best in performance and growth potential. Change the inner ring to routed links instead of switched ones.As you likely can't run extra fiber you could use WDM to leverage the already present strands. Connect all outer-ring switches to the inner-ring switches (CPS2, CPS3, HUS1, HUS2) directly.In both cases, tweaking the STP settings is still required and might not even be enough. 1.8K views 10 months ago Graph Theory We discuss what family of tree graphs have maximum diameter, minimum diameter, maximum radius, and minimum radius. Alternatively, switch to MSTP and create independent regions. Using (proprietary!) RSTVP+, decrease effective diameter by shortening the VLAN reaches (=remove VLANs from switches and trunks wherever possible).Since merely tweaking STP settings can't solve your problem, there are three basic approaches: The redundancy those loops are supposed to create is just imaginary anyway. Check out the link in Ricky's answer for how that would look like.Īctually, you'd be better off removing the closing loops S5-S6 and LIP-RUD and deactivating STP on those branches altogether. Since losing links like CPS2-V7 or CPS3-SAT would seriously increase the network diameter, chances are high that your network might not recover from a single link loss ("train wreck waiting to happen"). ![]() However, I suspect that that isn't the case. RPVST+ creates an independent spanning tree for each VLAN, so if your network doesn't exceed the maximum diameter within any VLAN, it might even work. As Ricky has shown so aptly, adjusting those settings may allow a diameter of up to 18.Įven if your network wasn't exceeding that already, a link disruption in the wrong place can substantially increase the diameter, likely rendering your network non-functional. As you've stated, STP with default settings can handle a network with a maximum diameter of 7. That topology far exceeds the xSTP design maximum. ![]()
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