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Feature #10222
closed
Tune GRE MTU if GRE over IPsec is used
Start date:
01/30/2020
Due date:
% Done:
100%
Estimated time:
Plus Target Version:
Release Notes:
Description
Default GRE MTU value is 1500 (it should be 1476 as maximum for ethernet),
This is impossible in most cases when GRE/IPsec is used
It can be useful to set default MTU value for such cases to 1400
by using such logic:
if ((GRE SOURCE == IPSEC PH1 SOURCE) && (GRE DESTINATION == IPSEC PH2 DESTINATION) &&
(IPSEC MODE == TRANSPORT) && (IPSEC == ENABLED) && (GRE MTU is not manually entered)) {
$GRE_MTU = 1400;
}
Updated by Viktor Gurov over 5 years ago
When you first create GRE/GIF interfaces, pfSense sets the correct MTU for it - 1476/1280
But with any change on the interface edit page, it set MTU to 1500
This PR also fixes this
Updated by Jim Pingle over 5 years ago
- Status changed from New to Pull Request Review
Updated by Renato Botelho over 5 years ago
- Status changed from Pull Request Review to Feedback
- Assignee set to Renato Botelho
- Target version set to 2.5.0
- % Done changed from 0 to 100
PR has been merged. Thanks!
Updated by Viktor Gurov over 5 years ago
- Status changed from Feedback to Resolved
tested on 2.5.0.a.20200219.1144
all three cases (GIF,GRE,GRE/IPsec) works as expected
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