Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

NEXUS VPC PEER-LINK

Posted on 2014-01-22
8
Medium Priority
?
407 Views
Last Modified: 2014-01-24
It is my understanding that the peer link is used for control traffic and that data traffic should not cross the peer-link.   I also understand that traffic that enters on a VPC on one chassis and then crosses the peer-link cannot leave the second chassis on a VPC.

Now the question.

Assuming that traffic has entered Chassis A on a VPC and then crossed the peer link to Chassis B.  Will the traffic be forwarded if the egress port of Chassis B is not configured for VPC but is just an orphan port????
0
Comment
Question by:sectel
[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
  • 4
  • 3
8 Comments
 
LVL 26

Expert Comment

by:Soulja
ID: 39801181
Any traffic that enters a vpc on one chassis will not cross the peer link, it will exit another VPC on the other chassis..
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 39802972
Will the traffic be forwarded if the egress port of Chassis B is not configured for VPC but is just an orphan port????
Yes
0
 
LVL 26

Expert Comment

by:Soulja
ID: 39803242
DonJohnston, can you expound? Maybe I am reading the question wrong, but based on below:


Assuming that traffic has entered Chassis A on a VPC and then crossed the peer link to Chassis B.  Will the traffic be forwarded if the egress port of Chassis B is not configured for VPC but is just an orphan port????

My understanding is since the VPC is connected to both chassis, the traffic would never have to cross the peer link. The traffic would go directly to up the link to chassis B and exit to the host connected to the orphan port.
0
Learn how to optimize MySQL for your business need

With the increasing importance of apps & networks in both business & personal interconnections, perfor. has become one of the key metrics of successful communication. This ebook is a hands-on business-case-driven guide to understanding MySQL query parameter tuning & database perf

 

Author Comment

by:sectel
ID: 39803347
Incorrect - the vpc makes the Upstream 7K pair as a single chassis, hence traffic originating from the source will be load balanced based on a hashing mechanism.  With one 10 gig link connecting to one chassis and the second connecting to the second chassis or chassis B, there is a 50 percent chance that the traffic may end up on Chassis B and thus have to cross the peer-link assuming that the upstream destination is only connected to a single orphan port on chassis A.
0
 
LVL 50

Assisted Solution

by:Don Johnston
Don Johnston earned 1000 total points
ID: 39803370
My understanding is since the VPC is connected to both chassis, the traffic would never have to cross the peer link.
No. There is very little data traffic crossing the peer link. Mostly broadcast, multicast and unknown unicast.
0
 
LVL 26

Accepted Solution

by:
Soulja earned 1000 total points
ID: 39803420
Ah, okay. That clears my misunderstanding and makes sense regarding the LACP channel.
0
 
LVL 26

Expert Comment

by:Soulja
ID: 39805628
Thanks for the points but they definitely should have gone to Don since my answer was incorrect.
0
 
LVL 50

Expert Comment

by:Don Johnston
ID: 39806285
Thank you.  That alone is worth more than the points!
0

Featured Post

Take our survey for a chance to win!

As a valued customer of Targus, we’d like to ask you a few questions about us. As thanks, you will be automatically entered for a chance to win a $500 VISA gift card. To enter, just complete the survey by September 15, 2017.

Question has a verified solution.

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

#Citrix #Netscaler #MSSQL #Load Balance
pc, laptop  monitor connection configurations
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.
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…
Suggested Courses

730 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