On Tue, Apr 21, 2020 at 04:12:16PM -0700, Chris Cappuccio wrote:
Tom Smyth [tom.sm...@wirelessconnect.eu] wrote:
Hi Chrisz,
4 bytes for the vlan header .. have you tried increasing the parent
intetface mtu by 4bytes
IFCAP_VLAN_MTU is a direct bypass for this. "hardmtu" on the parent interface
is perhaps more interesting as it will limit everything including these
encapsulations
IFAP_VLAN_MTU will affect how the hardmtu is passed on to vlan child
interfaces. The vlan interfaces won't care for the parent's "soft" mtu
AFAICS:
hardmtu = ifp0->if_hardmtu;
if (!ISSET(ifp0->if_capabilities, IFCAP_VLAN_MTU))
hardmtu -= EVL_ENCAPLEN;
Linux uses a MTU of 1536 for Pegasus chips. We always default to a
hardmtu of 1500. So the hardmtu can't be the cause for my interface not
managing full-size vlan.
Christopher
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