Solved

Network high availability on exchange using GLBP on cisco switch

Posted on 2010-09-13
6
462 Views
Last Modified: 2012-05-10
I am currently leveraging GLBP--gateway load balancing, on my 4948 cisco switches. This gives me the ability to connect 2 Ethernet cables into my servers, one from one switch and one from another. If one switch fails then the server still has a route out using the other link. This works well on everything but exchange. My exchange server has two nics on it and both are configured with a different ip address (10.10.0.105 and 104). I have send and receive when both nics are active and I can also send and receive if only the nic with 105 is active. I run into a problem when 105 goes down. I can send out but can not receive on 104, any thought as to why this would be happening? I have checked all firewall settings and everything is fine.
0
Comment
Question by:justin0104
[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
  • 3
  • 2
6 Comments
 
LVL 25

Accepted Solution

by:
Tony Johncock earned 500 total points
ID: 33670124
Which version of Exchange?
0
 

Author Comment

by:justin0104
ID: 33672084
Exchange 2010
0
 
LVL 25

Expert Comment

by:Tony Johncock
ID: 33672127
Ah ok - are your send/receive connectors bound to a single IP address?
0
Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

 
LVL 24

Expert Comment

by:rfc1180
ID: 33672148
>I run into a problem when 105 goes down
does the physical interface go down, meaning does the switchport go down/down

> I run into a problem when 105 goes down. I can send out but can not receive on 104, any thought as to why this would be happening?

I imagine it has to do with the switches have stale/outdated/incorrect layer 2 information, and possibly issues relating to multiple default gateways utilizing different metrics. The design you have is not mean to work the way that you think. What you are trying to accomplish is failover but with the wrong technology. You want to look into the concept of NIC Teaming (Bonding, etc).

Billy
0
 

Author Comment

by:justin0104
ID: 33672381
Yeah perferrably I would like to give the server 2 nics team them or whatever and have the same ip address on them so I don't have a problem like this.
0
 
LVL 25

Expert Comment

by:Tony Johncock
ID: 33672438
Teaming them is by far the better solution.

Basically you get one virtual network card with a single IP address and a virtual MAC address (which is usually a copy of the first NIC in the team).

I tend to set them as a failover pair only, as more advanced functions can cause issues with things like Exchange.

Once this is done, you can give the virtual NIC a static IP address (if it hasn't taken the one from the first NIC).

If one NIC goes down / cable is unplugged the other seamlessly takes over and Exchange won't even notice.

However - you should really cable one NIC into one switch and the other into another for the best resilience, otherwise if you lose a switch you still lose Exchange.
0

Featured Post

Secure Your Active Directory - April 20, 2017

Active Directory plays a critical role in your company’s IT infrastructure and keeping it secure in today’s hacker-infested world is a must.
Microsoft published 300+ pages of guidance, but who has the time, money, and resources to implement? Register now to find an easier way.

Question has a verified solution.

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

Marketers need statistics and metrics like everybody else needs oxygen. In this article we explain how to enable marketing campaign statistics for Microsoft Exchange mail.
This article explains how to install and use the NTBackup utility that comes with Windows Server.
In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…

749 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