Hi, Thanks a lot for your comments. The topology is pretty simple. A single VLAN between the following devices, with users connected to the Cisco switches using a VRRP gateway between SRX100 & SRX210.
[image: Inline image 1] It's strange that the SRX210 doesn't support MSTP - so can't go for MST between all devices. Regards. On Sat, Nov 10, 2012 at 5:38 PM, Jonathan Lassoff <[email protected]> wrote: > On Fri, Nov 9, 2012 at 9:57 PM, Saba Sumsam <[email protected]> > wrote: > > Hi, > > I have a Layer 2 network consisting of a Cisco 2970G, SRX210 and SRX100. > > Following are the STP modes supported on each: > > > > Cisco 2970G: mst, pvst, rapid-pvst > > Juniper SRX100: STP, RSTP. MSTP > > Juniper SRX210: STP, RSTP > > > > My question is: Is Cisco mst interoperable with Juniper RSTP. What mode > > should I be using on each device in this case? > > > > Suggestions highly appreciated. > > The best solution will really depend on your environment. > What is the topology like? > > I would avoid MST/MSTP unless you have a good reason to use it. A > Cisco running MSTP should interoperate with non-MSTP-speaking devices, > as external to MSTP-speaking boxes, each "region" looks like like a > big spanning-tree bridge. > > If your environment is simple and doesn't have any unusual > requirements, I would go for rapid-pvst/rstp on each device. > > Cheers, > jof >
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