Questions tagged [ieee-802.1s]

For questions about MST (Multiple Spanning Tree Protocol).

Filter by
Sorted by
Tagged with
0
votes
0answers
33 views

Spanning tree priority values on port-channel

Group Port-channel Protocol Ports ------------------------------------------------------------------------- 1 Po1(U) LACP Gi0/3(P),Gi0/9(P) 4 Po4(U) LACP ...
2
votes
2answers
298 views

Spanning tree Priority values

show spanning-tree interface gigabitethernet 0/2 Switch default Instance Role State Cost Prio type -------- ---- ----- ---- ---- ---- MST00 ...
1
vote
1answer
284 views

Spanning-tree MSTR port role

What is the MSTR port role in Spanning-tree ? It shows up on boundary ports between MST regions and switches running (R)PVST+. Note that it shows up only on the switches running MST. It seems to ...
5
votes
1answer
402 views

Is Per Vlan Spanning Tree or RPVST an open standard or can it only be implemented by Cisco?

I know there are some standards that are CISCO proprietary but have become open standards. CISCO has also updated the RFC to reflect this. So, is this also true for PVST? Does Juniper or other ...
2
votes
1answer
44 views

Edge detection on designated ports

If a switch doesn't receive a BPDU on a particular port it marks this port as "Edge Port". But any designated port won't receive any BPDU even though it was connected to other switches since their ...
3
votes
2answers
220 views

MSTP - different VLAN mapping in different regions

Regarding MSTP, is it possible to have different VLAN mapping for different regions ? Example: Region 1: Instance 1: VLAN 10,20,30 Instance 2: VLAN 40,50,60 Region 2: Instance 1: VLAN 10,50,60 ...
2
votes
4answers
403 views

H3C MST BPDU exchange failing

I am coming across the following MST issue. Between a HP5940 network core and HP5130 network access layer, I am using 5 instances of MST, configured like this : CORE switch stp region-configuration ...
1
vote
2answers
336 views

MST region and CST virtual bridge priority

In Multiple Spanning Tree, 802.1s, an MST region appears to the external world (another MST region, a 802.1d or 802.1w switch) as a single (virtual) bridge, using its IST instance. What is the ...
4
votes
2answers
2k views

Spanning-Tree Interoperability between ProCurve core & Cisco access layer

I need help regarding the following spanning-tree issue. I have a network core of 2 HP5412 (procurve) connected together using VRRP over a L2 tagged link. I have a Cisco 3560 connected to each of the ...
3
votes
1answer
1k views

Multiple Spanning-Tree. Same VLANs on instance for all switches?

I have a quick question regarding MSTP: Do all the switches in an MSTP domain should agree to which VLANs are mapped to an instance? Being that dumb, I've just caused an outage by just simply ...
3
votes
1answer
195 views

MSTP with no single point of failure with 4 switches and 2 regions

I'm trying to come up with a plan to get our core network design a bit more resilient to failure. Here is a drawing of what I would like to achieve: The final design would probably involve one more ...
4
votes
1answer
365 views

Can MSTP (802.1s) be used to emulate Rapid-PVST?

It is said that MSTP is used to group VLANs for different logical topologies. Can it be used to group individual VLANs (one VLAN per group) to imitate the behavior of Cisco's Rapid PVST (unique ...
3
votes
1answer
2k views

Easy PVST to MST transition

I have a scenario of six switches (C2960S, Version 12.2) running out of PVST instances so a transition to MST is inevitable. Seeing how small scale the setup is, I assume I could shut a few links to ...
10
votes
1answer
4k views

How can I make a PVST+ switch root towards MST network?

In a network where the majority of the switches are running MST but a select few are still running PVST+, how can the PVST+ switch be configured to be the root of the spanning tree? Topology below: +-...