# State-unknown,down

**URL:** <https://community.openpbs.org/t/state-unknown-down/2681>\
**Category:** Users/Site Administrators\
**Created:** [June 30, 2021, 8:45am UTC](https://community.openpbs.org/t/state-unknown-down/2681 "2021-06-30T08:45:47Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![boboshaq](https://avatars.discourse-cdn.com/v4/letter/b/bc8723/32.png) [@boboshaq](https://community.openpbs.org/u/boboshaq)\
**Post date:** [July 15, 2021, 9:20am UTC](https://community.openpbs.org/t/state-unknown-down/2681/18 "2021-07-15T09:20:44Z")

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Hi,  
I resolved this issue. Problem was in switches configuration. It concerns MTU. When You set MTU 9000 on interfaces, on switches You need to set max accept value of MTU.  
Regards!

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