Marki, Here is a production configuration we have between two N7 switches (names have been changed to protect the innocent):
*Switch 1* set spantree msti sid 1 create set spantree msti sid 2 create set spantree mstcfgid cfgname mst-region set spantree mstmap 10,30,50 sid 1 set spantree mstmap 20,40,60 sid 2 *Switch 2* set spantree msti sid 1 create set spantree msti sid 2 create set spantree mstcfgid cfgname mst-region set spantree mstmap 10,30,50 sid 1 set spantree mstmap 20,40,60 sid 2 On Mon, Feb 17, 2014 at 12:50 PM, Marki <[email protected]> wrote: > Hi, > > I'm about to separate our MSTP setup into different regions. > > The reason is simple: Most VLANs are only needed at the core, and > recomputations of those should not affect the entire "cloud" (and > vice-versa). > > For now, I have configured ONE additional region to the existing one. > > So in fact we now have two regions, the one shown in orange, as well as the > rest of the drawing: http://i57.tinypic.com/2557yix.png > > Now I find that drawing a setup with multiple regions in topology manager > does not seem to really work out, or there is some config issue. > > Here's some output from the switches > > G3 -> show spantree stats sid 1 > Spanning tree status - enabled > Spanning tree instance - 1 > Designated Root MacAddr - 00:1F:45:aa:xx:58 > Designated Root Port - 0 > Designated Root Priority - 32768 > Designated Root Cost - 0 > Root Max Age - 20 > Root Hello Time - 2 > Root Forward Delay - 15 > Bridge ID MAC Address - 00:1F:45:aa:xx:58 > Bridge ID Priority - 32768 > Bridge Max Age - 20 > Bridge Hello Time - 2 > Bridge Forward Delay - 15 > Topology Change Count - 65 > Time Since Top Change - 6 days 5:15:37 > Max Hops - 20 > > > B5 -> show spantree stats sid 1 > Spanning tree status - enabled > Spanning tree instance - 1 > Designated Root MacAddr - 00:1F:45:aa:xx:58 > Designated Root Port - ge.1.48 > Designated Root Priority - 32768 > Designated Root Cost - 20000 > Root Max Age - 20 > Root Hello Time - 2 > Root Forward Delay - 15 > Bridge ID MAC Address - 20:B3:99:bb:yy:DC > Bridge ID Priority - 32768 > Bridge Max Age - 20 > Bridge Hello Time - 2 > Bridge Forward Delay - 15 > Topology Change Count - 2 > Time Since Top Change - 19 days 3:53:19 > Max Hops - 20 > > The B5 seems to have accepted the G3 correctly as its STP root. > > But why are the links in (and out of the region) in topology manager > dotted? > > The MST Configuration Identifier is identical on the switches supposed to > form the region. > > "show spantree mstmap" and "show spantree vlanlist" show the same thing on > all those switches. > > What is a "designated root" as shown in the diagram? Does it mean the CIST > Root? > > BTW Neither do I find much on the CLI which would point me toward the > correctness of my setup. On Ciscos you see boundary ports and MACs of CIST > regional roots, is there some similar output here somewhere? > > And what does it mean when the CLI says during "show spantree mstmap": > > Vlan 1 is mapped to Sid CST > > Yeah there is no setting mapping it to an instance right. But even when I > have only one region it still talks about CST, although in my understanding > the CST only really exists when there are multiple regions. So what does > this mean? > > > This is Netsight 4.4 by the way, and the most recent FWs on the respective > switches. > > Best regards, > Marki > > > > > --- > To unsubscribe from enterasys, send email to [email protected] with the > body: unsubscribe enterasys [email protected] > -- Darrin E. Green Senior Technical Support Specialist Dallas Area Rapid Transit 1401 Pacific Avenue Dallas, Texas 75202 Ph 214-749-3173 Fax 214-749-3656 Email [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
