Does RHEL support FOU aka Foo-over-UDP tunnels?

Solution Verified - Updated -

Issue

  • Does RHEL support FOU aka Foo-over-UDP tunnels?
  • We are trying to load fou and fou6 loadable kernel modules but cannot:
# modprobe fou
modprobe: FATAL: Module fou not found in directory /lib/modules/...x86_64

# modprobe fou6
modprobe: FATAL: Module fou6 not found in directory /lib/modules/...x86_64

# modinfo fou
modinfo: ERROR: Module fou not found.

# modinfo fou6
modinfo: ERROR: Module fou6 not found.
  • Juniper Cloud Native Router (CNR) documentation specifies FOU as a requirement:

Additional kernel modules need to be loaded on the host before deploying Cloud-Native Router in L3 mode.

cat /etc/modules-load.d/crpd.conf
tun
fou
fou6
ipip
ip_tunnel
ip6_tunnel
mpls_gso
mpls_router
mpls_iptunnel
vrf
vxlan

Enable kernel-based forwarding on the Linux host.

ip fou add port 6635 ipproto 137

Environment

  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8
  • FOU or FOU6 (Foo-over-UDP protocol)

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content