Bug #2674
closed
MTU setting hardcoded 1280 for gif interfaces and in RADVD config
Added by Keenan Tims about 12 years ago.
Updated over 11 years ago.
Affected Version:
2.1-IPv6
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.
Indeed I did. Do we want to always advertise the local interface MTU or the WAN MTU?
- 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.
- Status changed from New to Feedback
- % Done changed from 0 to 100
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.
- Status changed from Feedback to Resolved
The "strange fragmentation problems" are a separate issue entirely (current PF has issues w/v6 frags).
Also available in: Atom
PDF
Updated by 
Updated by 
Updated by Ermal Luçi 
Updated by