?
Solved

SVI failover?

Posted on 2014-12-02
2
Medium Priority
?
199 Views
Last Modified: 2014-12-03
We've recently stretched a vlan across a layer 2 link (vlan tagged on a trunk) connecting two different datacenters.  I posed a question to a consultant  (DR planning) we've been using regarding the SVI for the stretched vlan.  The SVI is assigned to a switch in DC1 and all servers in this vlan use the svi as their default gateway.  In the event there is an issue with the switch in DC1, the SVI doesn't somehow get assigned to the switch in DC2, correct?  Like a sort of failover scenario for the SVI.

The consultant we've been working with claims this will work but I'm not so sure.  I don't have a lab environment to test this out in so I'm not sure how I can even come up with a good test for it.

I'm thinking if there is a failure with the switch in DC1, we would have to change the default gateway for any servers in that vlan to the svi in DC2.  Unless we use a HSRP or VRRP for failing over that default gateway.

The switches in each datacenter are Cisco 3850s.s
0
Comment
[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
2 Comments
 
LVL 50

Accepted Solution

by:
Don Johnston earned 2000 total points
ID: 40477715
In the event there is an issue with the switch in DC1, the SVI doesn't somehow get assigned to the switch in DC2, correct?
Correct.
The consultant we've been working with claims this will work but I'm not so sure.
Based on the information provided... I'd be looking for a new consultant. ;-)

But there could be some additional information that we're lacking, so they could be thinking about using HSRP or VRRP but haven't gone into that detail yet.
I'm thinking if there is a failure with the switch in DC1, we would have to change the default gateway for any servers in that vlan to the svi in DC2.  Unless we use a HSRP or VRRP for failing over that default gateway.
You are absolutely correct.
0
 

Author Closing Comment

by:Health Payment Systems
ID: 40479680
To be fair, he is the DR consultant not necessarily the network consultant.  

I just wanted to double check with someone that I was on the right path.  Thanks for the help.
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

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

PRTG Network Monitor lets you monitor your bandwidth usage, so you know who is using up your bandwidth, and what they're using it for.
In this article, we’ll look at how to deploy ProxySQL.
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
Suggested Courses

777 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