Decrease MTU to account for IPv6 header

Code Issues Proposed changes

(MTU - 50) only supports VxLAN over IPv4, decrease it
to support IPv6 as well, which is 20 bytes larger.
Change-Id: I0cf258770f628c1b4fb590bd274b5433fbcc1450

This commit is contained in:

Brian Haley

2020年11月06日 17:34:53 -05:00

parent 47f76acbba

commit 2bb62b43bf

1 changed files with 3 additions and 2 deletions

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5
playbooks/pre.yaml

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@@ -19,12 +19,13 @@

{% endfor -%}

{{- mtus|min -}}

- name:Calculate external_bridge_mtu

# 50 bytes is overhead for vxlan (which is greater than GRE

# 30 bytes is overhead for vxlan (which is greater than GRE

# allowing us to use either overlay option with this MTU.

# 40 bytes is overhead for IPv6, which will also support an IPv4 overlay.

# TODO(andreaf) This should work, but it may have to be reconcilied with

# the MTU setting used by the multinode setup roles in multinode pre.yaml

set_fact:

external_bridge_mtu:"{{ local_mtu | int - 50 }}"

external_bridge_mtu:"{{ local_mtu | int - 30 - 40 }}"

roles:

- configure-swap

- setup-stack-user

Decrease MTU to account for IPv6 header

5 playbooks/pre.yaml Unescape Escape View File

5
playbooks/pre.yaml

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