Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

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

Posted on 2011-02-27
1
Medium Priority
?
449 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

Tech or Treat!

Submit an article about your scariest tech experience—and the solution—and you’ll be automatically entered to win one of 4 fantastic tech gadgets.

Question has a verified solution.

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

The worst thing when starting a new job is when the previous Network Administrator left behind no documentation. How do you get into the devices? If you've been in this situation or just accidently mistyped your password, this article will hopefully…
This article will show how Aten was able to supply easy management and control for Artear's video walls and wide range display configurations of their newsroom.
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…

610 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