# No link-mtu in generated client configs

**URL:** <https://forum.pritunl.com/t/no-link-mtu-in-generated-client-configs/2080>\
**Category:** Pritunl VPN\
**Created:** [May 29, 2024, 10:59am UTC](https://forum.pritunl.com/t/no-link-mtu-in-generated-client-configs/2080 "2024-05-29T10:59:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![inkvizitor68sl](https://forum.pritunl.com/user_avatar/forum.pritunl.com/inkvizitor68sl/32/842_2.png) [@inkvizitor68sl](https://forum.pritunl.com/u/inkvizitor68sl)\
**Post date:** [May 29, 2024, 10:59am UTC](https://forum.pritunl.com/t/no-link-mtu-in-generated-client-configs/2080/1 "2024-05-29T10:59:32Z")

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We trying to set up pritunl-server in network, where PMTU not works. So i am trying to lower tun-mtu to valid value for this network.

It worked for tun0 on pritunl server, but not for clients:  
2024-05-29 13:36:31 WARNING: ‘link-mtu’ is used inconsistently, local=‘link-mtu 1572’, remote=‘link-mtu 1490’  
2024-05-29 13:36:31 WARNING: ‘tun-mtu’ is used inconsistently, local=‘tun-mtu 1500’, remote=‘tun-mtu 1418’

If i am manually set mtu=1418 on tun on client (ip link set tun0 mtu 1418) everything works as expected, but there are no anything about tun-mtu or something else in client .ovpn file

On host installed pritunl=1.32.3805.95-0ubuntu1~focal (however we have mixed versions cluster, because now we testing latest version on this host), client configs downloaded from that server

That happenes bot for tcp/udp openvpn server

Enterprise license used

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**Author:** ![zach](https://forum.pritunl.com/user_avatar/forum.pritunl.com/zach/32/1105_2.png) [@zach](https://forum.pritunl.com/u/zach)\
**Post date:** [June 5, 2024, 12:51pm UTC](https://forum.pritunl.com/t/no-link-mtu-in-generated-client-configs/2080/2 "2024-06-05T12:51:44Z")

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It shouldn’t need to be set in both the client and server configuration. I will look into adding it into the client configuration to fix any issues that are occurring.

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**Author:** ![inkvizitor68sl](https://forum.pritunl.com/user_avatar/forum.pritunl.com/inkvizitor68sl/32/842_2.png) [@inkvizitor68sl](https://forum.pritunl.com/u/inkvizitor68sl)\
**Post date:** [June 5, 2024, 1:14pm UTC](https://forum.pritunl.com/t/no-link-mtu-in-generated-client-configs/2080/4 "2024-06-05T13:14:39Z")

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Will take more tests before giving further info, sorry.

Anyway, i understood, that it is not common case to be connected to networks with non-default MTU + broken path-MTU, so it is definetely have not to be default option.  
Looks like “client MTU” field per-server is ok