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Questions tagged [spanning-tree]

55 questions
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cascading load on connected Alcatel-Lucent OmniSwitch units via VLANs

We are having an intermittent issue with a campus of Alcatel-Lucent Omniswitch switches, ranging from model 6000 to 6850. We are having a problem tracking down the root cause of our issue. The seems to be some rogue traffic or something causing…
J. Chin
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DHCP over PXE fails, but in the OS it works - with configured (R)STP

I'm trying to PXE-boot desktop-machines to install a new OS over the network, but it isn't picking up an IP address via DHCP during boot. When an OS is already booted on the machine, it is working fine. In the past i had some issues with this,…
derhelge
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Is grabbing multiple IP addresses from 1 link via a switch a good idea?

I need to connect several machines to the internet for work purposes. However, each workstation only has 1 LAN port. To get around this, I tried to connect a switch to the LAN port to "grab" multiple links from the LAN port. The setup goes something…
peonicles
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Spanning tree outage with root port removal

Today, A tech at a remote server site unplugged a single port from one of our fiber converters for our WAN uplink from a Dell PowerConnect Switch. We lost all networking on the 3 stacked 48 port switches for a while, and looking at the log, it…
Brian
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Strange behavoir of PVST

: The spanning-tree root for vlan 1050(192.168.50.0) is Core2 : The spanning-tree root for vlan 1020(192.168.20.0) is Core1 I was trying to add some redundancy to my network and added the links from switch 1 -> switch2, and switch2 -> switch3. I…
btk_
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Netgear GS724T port issue between two switches

We have three 24 port (Gigabit) Netgear GS724T switches which are connected in the following way: SW-003 > SW-001 > SW-002 The port on SW-002 that connects to Sw-003 is constantly flashing once per second, the rest are flickering as the data…
dannymcc
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Stackwise and RSTP states of other uplinks

Assuming I've got four C3750X, each side stacked with Stackwise Plus and using RSTP: C1 -----10Gbit----- C2 | | | | SW SW | | | | C3 -----10Gbit-----…
CyberOptic
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Spanning Tree Portfast in JUNOS

Can someone tell me what the Juniper JUNOS equivalent is for Cisco's spanning tree portfast command? My google-fu keeps leading me to long whitepapers on Spanning tree and not so much configuration examples.
SpacemanSpiff
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Spanning Tree Protocol: How are ports selected to be designated or non-designated?

I have read a lot about STP now. Perhaps not enough yet, but it starts to get difficult to get details. I have understood the mechanism how all bridges select their root port. After having exchanged enough BPDUs containing information about…
Ariser
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Point of Sale Terminal Crashing the Network

We look after a series of restaurants which is a collection of point of sale terminals and a typically a single workstation per site. We have one site that is causing a fair amount of head ache and no amount of google searching is answering the…
Kris Brunsgaard
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