STP and VTP ?

Hello,
can any one clear my below doubts,
1)Does STP(or PVST,or PVST+) enabled default on the switches.If yes then how can we disable it(just to know about this)
2)Does VTP enabled default on switches if yes then how to disable it.
Please reply ASAP.

Hi chand,
From your post,
You can disable STP by:
no spanning-tree vlan X
so this,
no spanning-tree vlan X is a global mode command?
then what is the command to disable PVST,PVST+,RSTP?
Waiting for your reply..

Similar Messages

Solving STP and VTP in DC enviornment

hi,
i m having 2 65xx Core switches with me and around 10 49xx and 10 3560 switches with me ..connected in a triangle (65xx with etherchaneel and all rest of switches with dual connection to both the core switches.
need to know what is the best way to configure them so as to avoid STP loops and also for VLAN's flow .
shall i divide the switches in half and make both the core as root ...or one as root ...
Kindly Help...

Well my opinion would be to go ahead with your design. Keeping it simple is the key only configure MST or RPST if you know what your doing with the config. PVST+ is simple and enabled by default. And as you say it is a Datacentre, i believe your design would be final in these cases just go ahead with PVST+. Use VTP transparent mode on all your access switches. This way you can keep control of the vlan information passing to your access switches. The core can run on VTP Transparent too.
Redundancy is an important factor. As you have mentioned you are using your 6500 as core, just another question are you having a single sup or double sup engine?
For your HSRP do load sharing across your core switches odd vlans given higher priority in Primary Core and even vlans given higher priority in Secondary core. Similary do remember the spanning-tree priority command.
For example vlan 10 which is having higher HSRP priority on Core Switch 1 should also have spanning-priority lower i.e probably keep it as 8192 and this spanning priority for Vlan 10 on Switch 2 should be 16384. Load share your layer 2 also across switches.
HTH
Hoogen
Do rate if this helps :)

Problems sending audio to and from STP and then back into FCP

I am having problems getting audio clips back into FCPro 5 after sending them to STP and editing them.
This is my process: "Send" mono file to STP as new audio project file.
Save it in the dialog that opens with "sent" at the end...then it opens in STP.
Edit it.
Save it and select include audio source files.
Switch back to FCPRo and I have a warning "Some Files Went offline", namely the one I just sent to Soundtrack. The clip is now apparently offline and white colored but now has the file name with "sent" included.
Where did I go wrong? This was working for me previously.
Dave Beaty all the latest SW versions ect...
imacs Dual G5's, G4's Other OS

Hi Blearyeyes,
I was just relaying what I've heard about the media going offline--I didn't claim that it made sense to me in these sorts of workflows where you know you are changing the media in STP, because you've just sent it to STP to be modified.
I've since dug through the FCP manuals, and it looks like it's the FCP rules about when a clip is considered to be offline that we're hitting--in the User Manual Part 2, on pages 79-80 there are some details about what causes the clip to go offline.
Here is one of the key statements from page 80--a clip is considered offline, "when a media file is modified, moved, or deleted, the modification date of the media file is changed, or the scratch disk becomes unavailable."

Logic Studio: Anyone using STP and WaveBurner to "master" L8 material?

Prior to Studio, I would mastering right in DP, burn in Toast. Or use DSP-Quattro if I needed the playlist function.
Since STP and WB are included in Studio, I was curious if people are using them to master Logic audio projects? Both interfaces look clean and easy to work with.
User impressions???

hi
I compose music and create sound design for TV commercials & short film projects.
I also use Logic Pro for all my music composition, but bounce into STP for mastering.
I don't use WaveBurner as most my work does not end up on CD.
gavin little
echolab
dublin, ireland
http://www.echo-lab.com
http://www.imdb.com/name/nm1962022/

Question in switching for STP and loop

hi ,
i have a question in loop issue , will it occur in this case or not
i will describe my scenario as below :
now i have 4 switches connected with full mesh.
=================
3 of them has stp protocol enabled
only 1 of them is un manged and dont support STP protocol
====================================
the question is :
if i connected the 4 switches full mesh , will the loop occurs ??
as i believe , stp loop prevention depend on the switch itself not on their neighbour , but not sure from my understanding
wish to help
regards

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
If there's only one or two non-STP switches, in a full mesh, you'll be okay. Once you have at least three non-STP switches, in a full mesh, you have a loop between them.

Audio exporting problems: from FCP to protool/STP and back again

--------------------------------------------------------------------------------
Final Cut Pro sound export for mastering.....sync problem
Hey,
I'm editing a 30 minute film and I have done most of the sound edit in FCP and Soundtrack pro and I want to now bring all the sound into pro tools to master the sound but every time i export sound into pro tools it seems to stretch by two or three seconds.
I have tried OMF, AIFF, XML, and Quicktime audio file sut to no avail!!!!
There are 50 tracks in the file so it is quiet large. It's not that there are handles of the file also as when I sync the file with the audio track with the video it syncs in one place but it is still out of sync in another.........It's as if the audio has been stretched!?!
If anyone has any advice it'd be much appreciated
Keith

Check the timecode rate and sync options in Protools. It sounds like a timecode or samplerate mismatch.
Especially note that 23.976fps OMFs from FCP (probably STP as well) show up in Protools as 24fps sessions. Change the PTs timecode to 23.976 to realign.

Encryption and VTP

Hi all,
I have two Cisco 1300's acting as bridges only. I have created an infrastructure ssid on VLAN 2 and assigned this to the radio. I am carrying multiple VLANs between the bridges (using subinterfaces on the fastethernet and radio ports).
I have enabled WPA-PSK, but how do I check that this is being used between the bridges?
Also - I have a switch connected at each end of the bridge. When I make VTP changes, the remote switch does not pick these up - is this because VTP goes over VLAN1 regardless of the Native VLAN (2 in my case)?
Do I have to carry VLAN1 over the bridge to get VTP working, or is there an alternative solution?
Cheers,
Ben

As soon as I enable a subinterface 0.1 for VLAN 1 on the fastEthernet port of the bridge, it can no longer contact the network through its directly connected interface.
Have I done something wrong? see below.
I have used the following commands:
dot11 ssid
infrastructure-ssid
int fastEthernet0.1
encapsulation dot1q 1
bridge-group 2
int fastEthernet0.2
encapsulation dot1q 2 native
bridge-group 1
int dot11radio0.1
encapsulation dot1q 1
bridge-group 2
int dot11radio0.2
encapsulation dot1q 2 native
bridge-group 1
ip route bridge 1
The switch port has this config:
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk allowed vlan 2
switchport trunk native vlan 2
Cheers,
Ben

Simple, basic issue - Sending a few clips at once from FCP to STP and back.

Hi,
I'm working on a 20 minute video, already cut, hoping to do some simple sound reduction on a few clips.
One scene has two video clips from the same camera shot, wind noise on the audio.
Can I send two or more clips to STP at the same time?
When I try that, the whole 1 hour tape (I did a batch capture) appears in the STP timeline.
Is there a way to send the clips so only those clips go to STP, not the whole original clip in the browser?
Once I do the noise reduction, why can't I get it to automatically apply to the clips in FCP?
I must be doing something wrong, but I don't know what.
Any ideas, anyone?
Thanks!

Multi-track projects won't behave like audio file projects, with automatic updates in FCP. Once you have saved the project, export a mix, and you can send it back to your FCP timeline in the dialog box.

STP and RSTP Convergence

Hi
I'm studying for the ICND exam and have a basic question for some one. After STP/RSTP has converged what ports recieve BPDU. Is it all ports on all switches that are part of the active topology or just the trunk ports. If there is a hub connected to the topology do all hub ports recieve the BPDU?
I wish I had a diagram to make my question clearer.
I would appreciate any advice.
Gavin

All ports forward\recieve BPDUs. If you use a network monitor\capture program such as Etherreal you can view the BPDUs that are recieved on your port. BPDUs are sent\recieved on active and STP disabled ports, the disabled ports just don't act as a forwarding port for normal traffic. This is so that spanning-tree can keep an accurate loop free topology.
Hope that helps

STP and Metadata

Hi,
Any ideas on how to assign metadata to wav files I edited in STP (from a live performance)?
I've tried several things (e.g., converting wav to Apple Lossless in iTunes) but when I burn a disc and put the disc in another machine (with iTunes), I get nothing but Track 01, etc. Thoughts?
mp

Thank you, I'm reading up on it now. $395 is the AudioDesk upgrade.
Looks like DP 5.1 has Mackie Control surface support.
I tried some more STP using a quicktime movie (very basic, capture from DV, Export to Quicktime Movie) -- if I add this Movie to STP I get no audio.
If I create a new STP project with just audio files, all works including setting output channels for 5.1 work and I see my 14 channels of output (what the Motu supports).
As soon as I add the any QuickTime Movie create by FCP, my audio goes away and I only see two available channels. It is as if there is something in the QuickTime 7 movie that is completely messing up audio output channels on my Motu. Motu's site mentions using QuickTime 6 because Apple modified how the audio works in QuickTime 7, but I would think Apple's own STP should be able to deal with this??
I'll give STP & FCP another days worth of trying to make it work, but my project has been stalled for over a week now with this problem so I need to find a solution even if that involves buying other software. But I'm definitely on "edge" now as my level of frustration is peaking with STP.
I send a formal bug/issue to Apple on this, but I doubt I'll get any response (never got even a confirmation last time I reported a bug) regardless of how much money I've spent on Apple hardware/software.
Thanks for the suggestion, Rob.

STP and GLBP

What is the recommended STP priorities if GLBP is going to be used with a redundant core/dist...

GLBP is not recommended in Layer 2 looped designs with blocking links at the access layer.
GLBP is best when there is no L2 connection between the Dist switches, only L3. This non-looped approach leaves both uplinks forwarding from the access switch and no matter which switch GLBP selects as the default gateway it is only one hop away.
Hope this help. Please rate all helpful posts. :)
-Brad

STP and Link Identification

Hi All,
STPs job, is to indentify links and manage possible loops in redundant networks(correct me if I'm wrong). I can attach a number of switches, that aren't using vlans(meaning no trunk links) just by attaching cables to and fro. Then, of course, I can have vlan enabled switches, that are interconnected via trunk links. Does STP distinguish between the two, and how..? I'm looking for a more detailed analysis of how it does this. CCNA Intro/ICND books don't explain well the difference, if 1 exists. Cheers.
coolboarderguy...

Hello,
STP does not distinguish between trunk links or access links. It listens to BPDU's (Bridge Protocol Data Units), if those are present on a port, the port will participate in the STP process. So, you could disable STP for all VLAN's on a trunk, and the trunk would not participate in STP.
Or, in CCO terminology:
Spanning-Tree Protocol (STP) prevents loops from being formed when switches or bridges are interconnected via multiple paths. Spanning-Tree Protocol implements the 802.1D IEEE algorithm by exchanging BPDU messages with other switches to detect loops, and then removes the loop by shutting down selected bridge interfaces. This algorithm guarantees that there is one and only one active path between two network devices.
HTH,
GP

VMPS and VTP and Layer 3 Design

I have a customer that has VMPS configured and working in a layer 2 network. It is working but we are seeing problems with vlans spanning their entire campus starting to cause problems.
Looking into a network design change where there will be layer 3 bounderies in the network. This means that we will be moving from a single VTP domain to multiple VTP domains based on layer 3 domains.
Question that I have is will VMPS still work?
In looking at the documentation, I am reading that VMPS is associating MAC to a VLAN Name mapping. As long as I keep the VLAN names consistant in each VTP domain, I think I will be alright.
Am I missing something?

Hello,
I think that vmps will not work if you use different VTP domains:
The VTP management domain and the management VLAN of VMPS clients and the VMPS server must be the same. For more information, see "Configuring VTP," and Chapter 11, "Configuring VLANs."
http://www.cisco.com/en/US/customer/products/hw/switches/ps700/products_configuration_guide_chapter09186a008007f9f3.html

Vpms and vtp question

Hi all,
I need someone to clarify me 1 issue about vpms and another about vtp.
vpms: In cisco's documentation the ASCII file on the tftp server which the VPMS server uses to download info so that properly respond to vpms client requests, contains only the vlan names, not the vlan ID(numbers).
Does this mean that i have manually configure vlan names and numbers on all vpms client switches and the vpms server? If not, how is it guranteeded the unique mapping of vlan names to vlan numbers on all switches?
vtp: Let a client vtp switch, with null domain and dtp in "desirable" mode on a fe port,inserted in a vtp domain so that this fe port connects to a fe port of a vtp server switch. Let the vtp server switch fe port is also in "desirable" mode.
Is there any DTP missmatch due to different domains or not?
Thanks in advance.

Bob:vpms: In cisco's documentation the ASCII file on the tftp server which the VPMS server uses to download info so that properly respond to vpms client requests, contains only the vlan names, not the vlan ID(numbers).
Does this mean that i have manually configure vlan names and numbers on all vpms client switches and the vpms server?
A: Only on server on VTP with server/client domain. you can't create vlan on vtp client.
Bob:If not, how is it guranteeded the unique mapping of vlan names to vlan numbers on all switches?
A: exactly, see above. switch does not assing ports to vlans by names, it's done by vlan number.
Bob:vtp: Let a client vtp switch, with null domain and dtp in "desirable" mode on a fe port,inserted in a vtp domain so that this fe port connects to a fe port of a vtp server switch. Let the vtp server switch fe port is also in "desirable" mode.
Is there any DTP missmatch due to different domains or not?
A:Trunk won't build, they must be in the same domain.

STP and Loop Guard

Hi everyone, I've a question for you guys:
Please check this topology: http://www.cisco.com/warp/public/473/84d.gif
I've read that you must enable loop guard on every nondesignated port (root and alternate ports) to prevent unidirectional related loops. I understand the situation where switch C unblooks the AP port and cause a loop. But what if the link is not unidirectional, what if switch B has some problem and indeed switch C should forward traffic to the segment C-B? Is there a difference between the link going down (disconected)and just stop seeing BPDUs?
Also, why would anyone configure loop guard on a root port? If for example, SWC stops seeing BPDUs from SWA, what would loop guard do? put the port in a block state or it would recalculate its Root port (port to SWB) and put the port to SWA into a designated state (after not receiving BPDS from SWA)? I'm very confused, any help would be greatly apretiated.
Omar Montes

The assumption made by STP is that if a link is not able to transmit BPDU, it is down. So if there is bidirectional link failure, the case is natively handled by STP. If there is only unidirectional link failure, you could end up with a unidirectional loop (which is about as bad as a bidirectional loop;-))
Loopguard is relevant on each port that is supposed to continuously receive BPDU. If your root port stop receiving BPDU, STP will move it to designated and elect a new root port. This is ok if your old root port cannot receive and transmit traffic. However, if the link is unidirectional and the port does not get blocked by loopguard, you will have a loop through the old and the new root port (in one direction only, the old root port TX direction).
Configuring loopguard on a designated port will not cause any problem anyway, so in fact you can configure loopguard blindly on all the port.
The IEEE introduced a feature (the dispute mechanism) that works much better than loopguard in order to protect against unidirectional link failure. However, this mechanism requires an RSTP bpdu format. It is currently only implemented in MST on cisco switches (it will be soon available in rapid-pvst). No need to use loopguard with the latest MST code at least.
Regards,
Francois

STP and VTP ?

Similar Messages

Maybe you are looking for