OK, how about this: I'll add a VLIB_CONFIG_FUNCTION, or [more likely] add a system default MTU parameter to one of the existing config functions.
I'm sick of cluttering configs with interface MTU commands... Thanks... Dave From: John Lo (loj) <l...@cisco.com> Sent: Wednesday, February 26, 2020 9:47 AM To: Dave Barach (dbarach) <dbar...@cisco.com>; vpp-dev <vpp-dev@lists.fd.io> Subject: RE: Change interface default MTU to 1500 Hi Dave, My memory was that in data center or cloud environment it is desirable to set MTU to jumbo frame size to avoid fragmentation by default. Thus the question would be if it is reasonable to set default MTU size to 9000 for VPP and what kind of problem is it causing that would be fixed by changing it to 1500. Regards, John From: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> On Behalf Of Dave Barach via Lists.Fd.Io Sent: Wednesday, February 26, 2020 8:40 AM To: vpp-dev <vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io>> Cc: vpp-dev@lists.fd.io<mailto:vpp-dev@lists.fd.io> Subject: [vpp-dev] Change interface default MTU to 1500 Folks, I'm considering changing the default interface MTU to 1500, from the current value of 9000: ethernet_register_interface (...) { <snip> /* Standard default ethernet MTU. */ vnet_sw_interface_set_mtu (vnm, hi->sw_if_index, 9000); <snip> } I've pinged some folks, and nobody remembers why we're setting the default MTU to 9000. Thanks... Dave
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