Is there a way to not set the do'nt fragment bit for Snapmirror transfers ?

alain_boyer — Thu, 05 Jun 2025 05:23:11 GMT

Hello guys,

We are having trouble wit snapmirror relationships over WAN.

Relationships are working perfectly on LAN on each site.

With pktt we discovered that snapmirror sets the do'nt fragment bit for transfers.

As we are using jumbo frames (MTU 9000) all transfers over WAN fail.

Workaround is to set, on FAS interfaces used by Snapmirror, MTU value lower than MTU allowed on WAN.

Is there a way to configure snapmirror or DOT not to set the do'nt fragment bit ?

We are using DOT 7-Mode 8.1.3

Many thanks for your help.

Alain

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