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Max length of crossover cable

Created: 24 Feb 2012 • Updated: 07 Mar 2012 | 3 comments
This issue has been solved. See solution.

We are about to deploy a new cluster on customer site, I have asked that the two servers are placed near to each other.  Customer has asked what is the maximum length permitted for the crossover cable for interconnects.

Any ideas?

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mikebounds's picture

This is governed by hardware and according to http://en.wikipedia.org/wiki/Category_5_cable:

Maximum cable segment length

According to the ANSI/TIA/EIA standard for category 5e copper cable (TIA/EIA 568-5-A[5]), the maximum length for a cable segment is 100 meters (328 feet). If longer runs are required, the use of active hardware such as a repeater, or a switch, is necessary.

Mike

UK Symantec Consultant in VCS, GCO, SF, VVR, VxAT on Solaris, AIX, HP-ux, Linux & Windows

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SOLUTION
Anoop_Kumar's picture

Veritas LLT does not limited to length of cable used for connect. Cable lenght matters with standards of networking as mentioned by Mike above.

~Anoop

Eric.Hennessey's picture

Consider the possibility that you may want to add a node to the cluster at some point in the future. If you've configured cluster comms on X-over cables, you'll have to take the cluster down in order to configure everything on switches.

I'd advise configuring a couple of VLANs on redundant switches for cluster comms instead.

Business Continuity Solutions Evangelist