Feature #1867
closed
RFE: DHCP Server option to set interface-MTU option to lowest WAN interface value
0%
Description
I have a setup with a Multi-WAN configuration, with one cable modem with MTU 1500 and one DSL modem, MTU 1492. After a bit of Wiresharking, I realized this and set the interface MTU on the DSL side, but then realized clients needed this setup as well, and finally discovered DHCP option 26 and set that to 1492, and now all is great.
To make this easier for the next guy, it would be lovely to have a checkbox inside the DHCP Server configuration, such as:
[X] Set DHCP interface MTU option to lowest WAN interface value
Having that as a default, even, would improve ease-of-use. I don't yet know how to do path MTU discovery on WAN interfaces, but if that's possible, with this option the whole mess could be plug-and-play.
Updated by Chris Buechler about 12 years ago
- Description updated (diff)
- Status changed from New to Closed
that's generally undesirable. That's why MSS clamping exists.