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EMC Isilon Shares Intermittently Appear Offline – Network Gateway Priority

I have seen an issue a couple of times now where shares on an Isilon intermittently appear offline, or if you have a share that is accessed constantly by an application, it can look as though they intermittently drop out. It can be tough to diagnose as browsing the share will show it is up and available, and when you call your network team to ask for help, you will be told there were no issues.

In each case I have seen the problem has been due to incorrectly configured Gateway Priority settings where the Isilon has multiple External Network Subnets.

As you can see below we have 2 subnets configure (I create these for the sake of this post so ignore IP settings etc)

When a subnet is created, by default the Gateway priority is configured to be 1.


What I usually do is set the subnet used for the management subnet to a lower priority

Hopefully this should resolve your intermittent drop out issues.



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shutterstock_185352599   Hi All, Welcome to my blog. I’m not sure anyone will find anything of use here, but as I am getting older and I have been making use of other people blogs for some time, I thought there might be a slim chance someone finds something useful here. I will try and keep my posts varied and frequent, I mainly work with the VMWare suite of products, but I still use “old faithful” Microsoft products where needed.

You may find some pieces of work here that you think you could improve on, and I welcome any feedback you have to give. Likewise if you are struggling with something, please drop me a line and I will be happy to help. Learning is part of the business, in fact for me its the best part, so feel free to get involved. You can email me on or get me on twitter @CompCrashers Hope to hear from you soon Dean

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