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Questions tagged [spanning-tree]

55 questions
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Spanning-tree setup with incompatible switches

I have a set of eight HP ProCurve 2910al-48G Ethernet switches at my datacenter that are set up in a star topology with no physical loops. I want to partially mesh the switches for redundancy and manage the loops with a spanning-tree…
wfaulk
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Intermittent connectivity problems for servers on VLAN 1 with spanning tree

Recently we implemented spanning tree and redundant links in our infrastructure. This has resulted in systems on the default VLAN having intermittent connectivity problems when I plug in the backup link. This is configured between a Cisco 3750 and…
Tim Brigham
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8 answers

New MPLS link bringing network to a halt - Spanning Tree Protocol

We have a simple 2 office location network. This was previuosly connected via kilostream connection. This has now been replaced by an MPLS connection using Cisco routers. When we connect the MPLS to the network of the main office location, the…
David
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3 answers

Firewall that supports HighAvailability and Spanning Tree

I'm looking for a firewall appliance that supports high availability and spanning tree. I have two ha-cluster nodes and I'd like to protect them with a firewall. To avoid a single point of failure, I'd like to have two ha-capable firewalls. And…
chris
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How do I stop STP from blocking ports assigned to different VLANs

I have a spanning tree issue on my Cisco SG500 SMB Switches that I could use some help solving. Here is a diagram of my setup: SW1 (ports 44-47, VLAN 10) connect to port 43 (VLAN 10) on SW2, SW3, SW4, SW5. When I connect SW2 (Port 44, VLAN 200) to…
Od29
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Cisco STP with SG550

I have created a lab connecting 4 switches like in the topology below to test a STP with cisco sg550xg, but somehow it's creating storm and gives me this error 1y22w: %SW_MATM-4-MACFLAP_NOTIF: Host 6c3b.6b1f.7548 in vlan 200 is flapping between…
Damjan Nikolovski
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Linux Spanning Tree between Bond and an interface

I try to do something with network virtualisation to get my Proxmox server ready for production in an HA environment i'm using openvswitch 2.5 the Setup that i try to reach: My Server which has 4 interfaces 3 link to switch1 and 1 link to switch2…
Gorshok
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EX4550 and EX4300 speak different dialects of JunOS 13.2X51-D35.3?

I have four EX4300-48T switches -- two in a VC, and two stand-alone -- both running JunOS 13.2X51-D35.3. I have, because I miraculously found some budget, added to these switches a pair of EX4550-32F switches in a second VC. I installed…
David Mackintosh
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Should the 3Com NJ225 switch implement the spanning tree protocol?

We recently purchased some 3Com IntelliJack NJ225 switches: (source: 3com.com) The specification states that they support IEEE 802.1D, and a mandatory part of this standard is support for the rapid spanning tree protocol. However, we quickly…
sblair
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Dell Switches and Spanning-Tree Route ID Configuration

I am analyzing a network for a colleague. It's a fairly simple topology and all the switches have converged on a common root-bridge, however two of the non-root bridges have identified the root as the MAC address of the root-bridge, whereras all the…
codefisher
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Spanning Tree Protocol on HP5406zl and Netgear edge switches

I have a simple star network setup, a core HP switch with servers and storage, and WAN uplinks on it, and then trunked 2 x 1GB uplinks to some crappy old Netgear switches (I know, but moving on). We recently had a network storm. After some…
SteveDolphin23
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Avoiding switch loop

Will I have loop problems with this topology because S2 and S3 are both connected to S1 and s4 ?
user567
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Portfast on a trunk port on a Cisco 3750

Good morning everyone! Some history, we have mixed environment of Dell Powerconnect 6248 switches and Cisco 3750 switches and a Cisco 6500 core for our Head office. We have two VLANs 1 & 20 where 20 is used for our VoIP, therefore ports need to be…
Richard
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3 dedicated wires for 3 VLANs between two switches: (M)STP failing

looking for a couple of hints from you we have a small but peculiar networking need: - 3 vlans, that are to be propagated among two L2 switches - we need to partition the vlans as much as possible, with the goal of keeping latency as much as…
gst
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spanning tree protocol(STP) bridge priority configuration

I'm trying to figure out the appropriate spanning tree protocol settings for a redundant network topology I'm in the process of implementing. The graphic demonstrates what the physical layer will look like(everything in question is labeled…
xtrusion
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