?
Solved

REF: BRIDGE CRITERIA AND MANUAL ENTRY OF PORT PRIORITY MULTIPLES OF 16

Posted on 2011-02-27
1
Medium Priority
?
447 Views
Last Modified: 2012-05-11
RERERING TO ELECTION CRITERIA BUT SPECIFIC TO 'LOWEST SENDER PORT ID'

If there is a design of switches in the form of a tree or whatever, for example and the 'Root Bridge/Switch' is at the TOP and a company wished to add a 'Manual entry' ie to prioritize each of their department switches.

I have read it can be done as although the default priority is 128, this can be changed specifically for individual vlans in multiples of 16 ie:

Lowest Sender Port ID
- consists of Port priority
- And port ID (port number)
- Port priority can be configured
- config-if)#spanning-tree vlan 10 port-priority 16, or 32 or 48 etc etc

If this is true does that mean if a company does NOT have the relevant IOS features to use 'SAY'  'RSTP+ OR MST', which have the feature, 1 instance per vlan, is the above an 'OLD' feature which was replace by 'RSTP+ OR MST' for example?
0
Comment
Question by:mikey250
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 50

Accepted Solution

by:
Don Johnston earned 2000 total points
ID: 34993924
>I have read it can be done as although the default priority is 128

A default priority of 128 is in the DEC spanning-tree spec. The default priority in IEEE 802.1d spanning-tree is 32768.

>this can be changed specifically for individual vlans in multiples of 16 ie:

You can only change the priority on a per-VLAN basis if you're running Per-VLAN spanning-tree.

The original STP (DEC) and the industry implementation of 802.1d uses Common (or Mono) Spanning-Tree. That is a single instance of spanning-tree regardless of VLANs. Cisco's implementation is to have a separate instance for each VLAN.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I see many questions here on Experts Exchange regarding switch port configurations and trunks. This article is meant for beginners in the subject to help to get basic knowledge about Virtual Local Area Network (VLAN (http://en.wikipedia.org/wiki/Vir…
This tutorial will go through the steps required to write a script that will back up the configuration settings of a HP-ProCurve switch. You will need to get the following things to follow this tutorial: Telnet Scripting Tool e.g. TST10.exe …
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question