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- spanning tree - RSTP MSTP use cases and best practices - Network . . .
Three MSTP instances (one for each of the rings: A, B and C) - VLANs 2 22 mapped to each instance First question here - should MSTP instances map different VLAN numbers to them (e g relabel VLAN2 in ring A to VLAN22 for MSTP instance 1 and VLAN 2 in ring C to VLAN222 for MSTP instance 3)?
- Multiple spanning tree terminology (CST IST CIST) and exact behavior
All of the other spanning tree instance information is contained in MSTP records (M-records), which are encapsulated within MST BPDUs Because the MST BPDU carries information for all instances, the number of BPDUs that need to be processed to support multiple spanning tree instances is significantly reduced
- How fast can STP, RSTP, and MSTP find a new route?
If I have two switches connected redundantly and both are capable of using STP, RSTP, or MSTP, how quickly can an alternate route be detected and normal communication resume if the main route is disconnected?
- MSTP and Rapid-PVST+ - Network Engineering Stack Exchange
When MSTP region is connected to an (R)PVST+ region, it tries to speak (R)PVST+ and process received (R)PVST+ BPDUs This process is called PVST Simulation However, there are major difficulties in this process: the (R)PVST+ uses per-VLAN semantics while MSTP runs instances with VLANs simply mapped onto them
- spanning tree - MSTP with different VLANs blocking port - Network . . .
Each MSTP instance forms its own spanning tree By organizing instances differently from the CST - (root) bridge priorities and port priorities - you can move the traffic and utilize ports blocked in other instances
- Maximum switch using RSTP or MSTP - Network Engineering Stack Exchange
RSTP and MSTP can support up to 40 switches It's not about the number of switches but about the diameter, the maximum number of hops between any two nodes You can easily run a network of hundreds or even thousands of switches with a network diameter of five (at least in theory, that size would create other problems), e g
- MSTP: same VLANs in different regions - Network Engineering Stack Exchange
MSTP (and all STP versions) is to prevent routing loops, not separate VLANs VLANs are separated by routers (layer-3 devices) You can have the same VLAN number on different router interfaces, but they will be separate VLANs because a VLAN will end at a router
- Using MSTP with RSTP - Network Engineering Stack Exchange
One of the important concepts in MSTP is the MSTP region, which is a set of directly connected MSTP switches with the same configuration (digest) MSTP rules apply only to the region and intra-regional links Inter-regional links are fully backward compatible with RSTP
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