How does one set interface mtu option of the DHCP server for jumbo frames?
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How do you set the interface-mtu option of dhcpd to 9000?
Here's what I've tried:
"Additional BOOTP/DHCP Options" has entries consisting of:
<option number=""> <type> <value></value></type></option>
The descriptions says "For a list of available options please visit this URL."
http://www.iana.org/assignments/bootp-dhcp-parameters/The URL says option 26 is "Interface MTU", so I entered (screenshot below):
26 Unsigned 16-bit-interger 9000
And the resulting /var/dhcpd/etc/dhcpd.conf contains:
subnet 172.16.4.0 netmask 255.255.255.0 { ... option custom-lan-0 9000; }
After saving the change and bouncing the dhcpd servers, dhcp clients still get configured for 1500 mtu.
I would have expected dhcpd.conf to have something like "option interface-mtu 9000;", so perhaps I'm not using the GUI correctly.
Does anyone have any ideas about how to configure MTU?
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I have submited a pull request in hopes of resolving the capability to set MTU on dhcp pools.
https://github.com/pfsense/pfsense/pull/3222