Saving bandwidth with VTP Pruning
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- Опубликовано: 16 окт 2024
- VTP pruning can be used in Cisco networks to filter unneeded traffic from crossing trunk ports. In this short video, you will learn how to configure and verify this feature on a Cisco Catalyst 3560 series switch.
More than 10 years later and this video is still helpful.
Thank you Themistocles Nelson!
I really like this teacher, Keith and Jeremy are the BEST instructors so far !!!!!!!!!!
Agreed
You are welcome!
Thanks for the comments.
Best wishes,
Keith Barker
Sir you are ocean of networking :)
You have a good point.
Thanks for your comment.
Keith
So far the best video on VTP pruning topic, thanks.
Thanks for this excellent video. With benefits like this, I always wonder why many production networks do not run VTP. Especially when the major downside to VTP can EASILY be avoided by proper precaution and diligence when installing new switches.
@@trustthe_process4371 that is what I believe too. VTP just avoids so many headaches and manual labour. Imagine having to add VLANs manually via switchport trunk allowed vlan commands on dozens or hundreds of switches every time VLAN requirements change on switches. VTP Pruning would take care of it instantly and automagically, like Keith says :)
Great video Keith, clear to understand. Keep it up!
Thanks for this video Keith. VTP prunning is missing in Packet Tracer and even though there is not a lot of configuration it was nice to see it in action
thanks a lot Keith...excellent presentation
Thanks Keith Barker. It was very very helpful.
The Best Instructor ever.
Thanks Keith. It is a simple subject, but it is important!
Thank you for running through this. I'm CCNP and somehow forgot this mechanism.
Lets just say I dislike VTP pruning. I've been troubleshooting for a good day or so the reasons why ARP broadcasts were not reaching the default gateway SVI.
Keith, first of all thanks so much for this explanation, but I have one daub, if you have 3 switches in a triangle and you configure 2 of them with interfaces vlan 100 (example), and VTP Pruning, it will function ok... but there will not be stp tree, since the backup link has pruned the vlan 100, so in any convergence scenario the timer will rely on VTP pruning convergence right?... is VTP Suitable for any production Network??.. thank you so much
Could you explain why - when you added VLAN 2 on SW4 - the VTP de-prune was sent through SW3 instead of both SW3 + SW2? The diagram shows uplinks going to both SW3 + SW2 from SW4, which both have uplinks to SW1. Why does VTP de-prune only traverse one switch and not both?
STP
great, informative video, and as all are, just amazing!
hi Keith, I am looking at the CCNA book and it says "you can enable pruning only on Cisco catalyst switches that are configured for VTP servers, and NOT on clients". Your video mentioned "Server and client, but not on Transparent switch". Wonder what's right? Thanks.
The VTP pruning caused port 0/23 to not forward for VLAN 2.
thanks a lot Keith. Was of great help
What conflicts will the network have if there was a transparent switch in the mix?
Good job, Keith! Thanks!
Hi Keith,
So on a transparent switch, VTP pruning will not work if the vlan 2 is not on the vlan database is that right? But if vlan 2 is in the vlan database, the transparent switch will just forward frames destined for vlan 2 on it's trunk port. My question is that once you configure vtp pruning on global config mode on a transparent switch, will there be a message saying feature can't be enabled on a transparent mode or similar to that?
THX a lot a greate video with a lot of enjoyment.
thanks a lot , excellent presentation
Thanks. Great video.
Keith, my understanding is that "switchport trunk allowed vlan" command will control (allow or block) all Vlan traffic whether it is unicast, broadcast or multicasts where as VTP Pruning and Switchport trunk Pruning vlan command can only control(allow or Block) the multicats, broadcast and unknown unicast but not the normal unicast. Is that correct?
If a VLAN is dynamically pruned, there won't be any source MAC addresses from that VLAN so there won't be any L2 unicast frames going to any devices in that VLAN. So with the lack of any unicast L2 addresses for that VLAN, the only thing left to block would be broadcasts, unknowns and multicasts.
+Keith Barker so vtp is pruning the vlans on clients that doesnt have any access ports trying to access vlan 2 traffic ? And this mechanism fails for the access swtiches that are configured in transparent mode ?
I have a environment where vtp is in server client mode and there are layer 2 vlans which are not in use,but are seen across everywhere in environment but are not pruned and seen on each trunk list under status not pruned! we are not allowing switch prot trunk allowed on the interface but default trunk mode.. these vlans are configured only as layer 2 on core !!! There are no layer 3 interfaces configured yet on the core, is this could be the reason ?
Or do I need to manually allow the pruning mode to be enabled on vtp ?
Let me know the timestamp for what you are looking at, and I can verify it for you.
Thanks,
Keith
@Qtaroism Only "servers" can make changes to the VTP configuration.
Thanks for Video. Here switch 2 still doesn't needed any traffic on VLAN 2 even after configuring it on switch 4 .. why because of STP ???
Also Swtich 3 Trunk port Fa 0/19 still showing as VLAN 2 as forwarding before configuring it in Switch 4. Why is it like this ?? Even the VTP server Pruned that then why not VTP clients still if it doesnt require before configuring logical interface in switch 4
what is the different between trunk allowed vlan and vtp pruning ?
So if i have a transparent switch and i want vtp prunning to other devices except it? What do i do?
Actually whats the problem with transparent switch?
great video :9
thanks for sharing boss
what simulation software are you using? Can provide guideline how to install?
This specific video was created using live switches.
@@KeithBarker yep, the SecureCRT sort of gave that away :) and btw, awesome explanation on VTP Pruning.
Just wondering why did switch 4 took the path via switch 3 and not switch 2 when it sent out the message requesting vlan 2 traffic
Due to STP, the link going to switch 3 is the backup or alternate path.
there would not have conflicts. transparent switch just forward data through the network, it is not part of the vtp domain.
help, i introduce vtp pruning and then the packet tracer show this "% Invalid input detected at '^' marker."
Packet tracer may not support all the features of the live IOS.
@@KeithBarker Thanksthat's exactly what my university teacher told me
bravo
Thx keith
yes actually. Thanks!
shouldn't watch youtube videos on your commodore 64... the video looked great for me... with a computer... in this decade LOL
at 09:15
poor video hardly to see that .