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	diff --git a/roles/core/sysctl/files/sysctl.conf b/roles/core/sysctl/files/sysctl.conf
	index 86819ff..9d87dd4 100644
	--- a/roles/core/sysctl/files/sysctl.conf
	+++ b/roles/core/sysctl/files/sysctl.conf
	@@ -1,35 +1,41 @@
	# -------------------------------------------------------------
	# Kernel state configuration
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Nasqueron
	# Created: 2017-11-06
	# License: Trivial work, not eligible to copyright
	# Source file: roles/core/sysctl/files/sysctl.conf
	# -------------------------------------------------------------
	#
	# <auto-generated>
	# This file is managed by our rOPS SaltStack repository.
	#
	# Changes to this file may cause incorrect behavior
	# and will be lost if the state is redeployed.
	# </auto-generated>
	+{% if is_router %}
	+# -------------------------------------------------------------
	+# Network
	+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	+net.inet.ip.forwarding=1
	+{% endif %}
	# -------------------------------------------------------------
	# VFS — kernel interface to file systems
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

	# Allow user to mount disks (required by FUSE or PEFS)
	vfs.usermount=1

	-{% if use_zfs %}
	+{%- if use_zfs %}

	{% if mem < 4096 %}
	# Maximum size of the Adaptive Replacement Cache (ARC).
	vfs.zfs.arc_max = 2147483648
	{% endif %}

	# Keep prefetch: this works by reading larger blocks than were requested
	# into the ARC in hopes that the data will be needed soon.
	vfs.zfs.prefetch_disable=0

	-{% endif %}
	+{% endif -%}
	diff --git a/roles/core/sysctl/init.sls b/roles/core/sysctl/init.sls
	index 9410121..26f205c 100644
	--- a/roles/core/sysctl/init.sls
	+++ b/roles/core/sysctl/init.sls
	@@ -1,22 +1,23 @@
	# -------------------------------------------------------------
	# Salt — Kernel state
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Nasqueron
	# Created: 2017-11-06
	# License: Trivial work, not eligible to copyright
	#
	# -------------------------------------------------------------

	{% if grains['os'] == 'FreeBSD' %}

	{% set use_zfs = salt['node.has']('zfs:pool') %}

	/etc/sysctl.conf:
	file.managed:
	- source: salt://roles/core/sysctl/files/sysctl.conf
	- template: jinja
	- context:
	use_zfs: {{ use_zfs }}
	mem: {{ grains['mem_total'] }}
	+ is_router: {{ "router" in grains['roles'] }}

	{% endif %}

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