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Common Address Redundancy Protocol

Posted on 2007-03-30
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Last Modified: 2008-03-24
Has anyone here used carp from openbsd before. I just read up on the protocol and was trying to understand it. 1) Is it included with redhat? 2) is it really hard to configure? 3) where can I download it at? 4) i wanted to use it to make two zimbra servers redundant - do you think this would work?

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Question by:pauly10477
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by:Nopius
ID: 18840876
I don't know about CARP for Linux. Probably it doesn't support it. CARP is a free alternative of Cisco's VRRP on OpenBSD. At the same time Linux has support of HSRP, that is also a free alternative to VRRP.
You may use it there.
As I see in product chart for Zimbra: http://www.zimbra.com/products/product_editions.html
All editions except open source supports HA clustering. Without this support even with redundant (roaming) IP address you will have a lot of troubles in area of synchronization and common storage between nodes. It's probably better to ask zimpbra support how do they provide redundancy and buy appropriate edition if you are saticfied with their answer. I didn't find any documentation about clustering on Zimbra docs page.
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by:Nopius
ID: 18841025
Also you may take a look to these pages, related to your problem (how Linux may be used for redundancy):
http://www.linux-vs.org/
http://www.keepalived.org/
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by:MCode151
ID: 19079290
any adversion to using RHEL cluster suite?
(the perfered method by zimbra)
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by:pauly10477
ID: 19084331
i have the open source of zimbra running.
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by:Nopius
ID: 19090663
Then no clustering is available. Of course you may invent bicycle again, I mean add clustring support to opensource edition (when it's already there, in all other editions), but I'm sure that is not a recommended way...
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by:Hanno Schröder
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No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup Zone:
ACCEPT Nopius's comment {http:#18840876} as answer

Any objections should be posted here in the next 4 days. After that time, the question will be closed.
JustUNIX, Experts Exchange Cleanup Volunteer
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by:Nopius
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MCode151, hi.

I vote for your solution, it is really good to know :-)
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by:Computer101
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Forced accept.

Computer101
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