Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [stp]

The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network.

The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and ensuing broadcast radiation. Spanning tree also allows a network design to include spare (redundant) links to provide automatic backup paths if an active link fails, without the danger of bridge loops, or the need for manual enabling/disabling of these backup links.

STP is a Data Link Layer protocol. It is standardized as IEEE 802.1D. As the name suggests, it creates a spanning tree within a mesh network of connected layer-2 bridges (typically Ethernet switches), and disables those links that are not part of the spanning tree, leaving a single active path between any two network nodes.

STP is based on an algorithm invented by Radia Perlman while working for Digital Equipment Corporation.

SOURCE: http://en.wikipedia.org/wiki/Spanning_Tree_Protocol

53 questions
1
vote
1 answer

HP Procurve STP Path Blocking

I have four Switches that are interconnected with each other, witch form a loop as shown in this network diagram The switch 1 is the root bridge and is connected to the primary edge router. The switch 2 is the failover root bridge and is connected…
Skanderbeg
  • 15
  • 4
1
vote
0 answers

STP packets dropped (1 packet every 2 seconds) when irrelevant multicast group joined on the interface

I'm trying to understand weird packet drop issue when joining particular multicast group. I think this issue is related to patch introduced in kernel ver 2.6.37 Beginning with kernel 2.6.37, it has been changed the meaning of dropped packet count.…
pst
  • 11
  • 4
1
vote
1 answer

LACP and STP configuration

I am trying to understand LACP in the context of STP. Case 1. There is a server connecting to 2 different switches for redundancy purpose and a bond interface created with 2 slaves physically connecting to each switches with a bonding mode 802.3ad.…
user88975
  • 113
  • 1
  • 4
1
vote
1 answer

Configure STP in WAN Bridge

Hardware: 2 pFsense Box 1 Switch Dlink DGS-3324SR I need to configure a STP into my network because i'm trying to set a wan redundant bridge for a web server. (Take a look to my Network Diagram) So i need to prevent the loops (Broadcast Storms)…
Jonathan Edgardo
  • 113
  • 2
1
vote
1 answer

Cisco VSS failure.

We have two 6500s running with VSS. We have a switch with dual uplinks. Each uplink goes to a different 6500. If the VSL between the 6500s goes down then they both become active. This breaks the etherchannel on the switch and it chooses one of…
Network_Geek
  • 11
  • 3
1
vote
4 answers

Will this cause STP to reconverge?

If I configure a second interface on the router to connect to the same network as the other, will it cause spanning-tree to reconverge when I plug it into the switch? E.g. existing interface is 10.1.1.1/24, and I need to configure and add…
ewall
  • 1,054
  • 3
  • 13
  • 23
1
vote
2 answers

Spanning Tree Necessary With 2 Stacked Dell Managed Switches?

I have a PowerConnect 6248 and 6224P stacked with the 6248 acting as the managing switch. They're connected using the 48Gbps stacking module with 2 cables running between the switches. Do I need to have STP on for this configuration? I'm not…
FullTimeCoderPartTimeSysAdmin
  • 309
  • 1
  • 5
  • 12
1
vote
4 answers

Blocking STP Traffic

I am using Xen virtualization with a bridged mode netwrk. I noticed that there is a lot of spanning tree (as understand) traffic coming from a network. Such as: STP 802.1d, Config, Flags [none], bridge-id ...... STP 802.1s, Rapid STP, CIST Flags…
Radium
  • 33
  • 1
  • 6
1
vote
2 answers

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
  • 11
  • 2
1
vote
0 answers

STP on a bridge

I have set up a bridge on an interface em1 and connected 4 vms to the bridge. I disabled stp on the bridge. There is no chance of looping as there is only one bridge in this setup, there occurs a BPDU error due to broadcast storming in my switch.…
kalyan
  • 229
  • 1
  • 2
  • 11
1
vote
2 answers

Ways to test CISCO REP

Linked to Good reference for Cisco Resilient Ethernet Protocol I am looking to demonstrate REP's effectiveness to non technical people, on an Industrial Network at a local university. I am a software developer(Studying to be anyway) and have little…
Stephen Murby
  • 111
  • 2
1
vote
2 answers

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
  • 13
  • 1
  • 3
1
vote
1 answer

Spanning Tree Protocol (STP) to prevent network loop back issues?

I have several locations with managed network switches - for example, one being a stack of 3com 4500's. On occasion we have an issue where a user somewhere in the building decides to plug in their own consumer grade switch, which is fine until…
Scott Szretter
  • 1,860
  • 11
  • 42
  • 66
1
vote
1 answer

Spanning tree problems in a shared HP ProCurve environment

we're sharing a server room with another company, including the network infrastructure. All the switches are HP ProCurve, in various models depending on port need and so on. We're using VLANs to separate traffic to various virtual servers Problem…
Vegar Nilsen
  • 163
  • 2
  • 5
1
vote
1 answer

HP Network Device Management Software

I look after a network with 11 x new HP v1910 24-port 1GB switches and 2 x HP 4204vl 1GB Chassis switches. I'm looking for software to enable me to: Map the network graphically - there are a lot of fibre and copper LACP links Provide a single view…
Alasdair C-S
  • 329
  • 1
  • 7
1
2
3 4