Bug #2674
closedMTU setting hardcoded 1280 for gif interfaces and in RADVD config
100%
Description
The MTU setting in the GUI for gif interfaces is ignored, and set to hardcoded or default value of 1280. Likewise, RADVD advertises a hardcoded link MTU, which should be read from interface config / appropriate defaults for link type.
Updated by Seth Mos over 11 years ago
Indeed I did. Do we want to always advertise the local interface MTU or the WAN MTU?
Updated by Chris Buechler over 11 years ago
- Category set to Interfaces
- Target version set to 2.1
- Affected Version set to 2.1-IPv6
Normally I'd say the local interface MTU, but since there's no MSS clamping on v6 for the time being, probably the WAN MTU is best to avoid issues.
Updated by Ermal Luçi over 11 years ago
- Status changed from New to Feedback
- % Done changed from 0 to 100
Applied in changeset a6bc492fecd64a3a9f3b4cc4a003d6761494a694.
Updated by Adam Thompson about 11 years ago
As of {2.1-RC1 (amd64) built on Tue Aug 13 14:23:15 EDT 2013 FreeBSD 8.3-RELEASE-p9}, GIF tunnels still default to 1280. I can override up to 1480 and that appears to work correctly, but I am seeing strange fragmentation problems no matter what MTU I use.
Updated by Chris Buechler about 11 years ago
- Status changed from Feedback to Resolved
The "strange fragmentation problems" are a separate issue entirely (current PF has issues w/v6 frags).