====== 5 Routen ======
{{ :lpi2:routing5.svg |}}
===== "Router" anlegen =====
  ip netns add a
  ip netns add b1
  ip netns add b2
  ip netns add c
===== "Kabel" verlegen =====
  ip link add a0    type dummy
  ip link add a-b1  type veth peer name b1-a
  ip link add a-b2  type veth peer name b2-a
  ip link add b1-b2 type veth peer name b2-b1
  ip link add b1-c  type veth peer name c-b1
  ip link add b2-c  type veth peer name c-b2
  ip link add c0    type dummy
  ip link set dev a0    netns a
  ip link set dev a-b1  netns a
  ip link set dev a-b2  netns a
  ip link set dev b1-a  netns b1
  ip link set dev b1-b2 netns b1
  ip link set dev b1-c  netns b1
  ip link set dev b2-a  netns b2
  ip link set dev b2-b1 netns b2
  ip link set dev b2-c  netns b2
  ip link set dev c-b1  netns c
  ip link set dev c-b2  netns c
  ip link set dev c0    netns c

===== Terminal a konfigurieren =====
  ip netns exec a /bin/bash
  export PS1="${debian_chroot:+($debian_chroot)}\u@ns-a-:\w\$ "
  sysctl -w 'net.ipv6.conf.all.forwarding=1'
  ip link set up dev lo
  ip link set up dev a0
  ip link set up dev a-b1
  ip link set up dev a-b2
  ip addr add fc0a::a/64 dev a0
  ip addr add fc01::a/64 dev a-b1
  ip addr add fc02::a/64 dev a-b2

Prüfen:
  ip -6 -c addr show

===== Terminal b1 konfigurieren =====
  ip netns exec b1 /bin/bash
  export PS1="${debian_chroot:+($debian_chroot)}\u@ns-b1-:\w\$ "
  sysctl -w 'net.ipv6.conf.all.forwarding=1'
  ip link set up dev lo
  ip link set up dev b1-a
  ip link set up dev b1-b2
  ip link set up dev b1-c
  ip addr add fc01::b1/64 dev b1-a
  ip addr add fc03::b1/64 dev b1-b2
  ip addr add fc04::b1/64 dev b1-c

Prüfen:
  ip -6 -c addr show
  ip -6 -c route show
  ping -qc1 fc01::a

===== Terminal b2 konfigurieren =====
  ip netns exec b2 /bin/bash
  export PS1="${debian_chroot:+($debian_chroot)}\u@ns-b2-:\w\$ "
  sysctl -w 'net.ipv6.conf.all.forwarding=1'
  ip link set up dev lo
  ip link set up dev b2-a
  ip link set up dev b2-b1
  ip link set up dev b2-c
  ip addr add fc02::b2/64 dev b2-a
  ip addr add fc03::b2/64 dev b2-b1
  ip addr add fc05::b2/64 dev b2-c

Prüfen:
  ip -6 -c addr show
  ip -6 -c route show
  ping -qc1 fc02::a
  ping -qc1 fc03::b1

===== Terminal c konfigurieren =====
  ip netns exec c /bin/bash
  export PS1="${debian_chroot:+($debian_chroot)}\u@ns-c-:\w\$ "
  sysctl -w 'net.ipv6.conf.all.forwarding=1'
  ip link set up dev lo
  ip link set up dev c-b1
  ip link set up dev c-b2
  ip link set up dev c0
  ip addr add fc04::c/64 dev c-b1
  ip addr add fc05::c/64 dev c-b2
  ip addr add fc0c::c/64 dev c0

Prüfen:
  ip -6 -c addr show
  ip -6 -c route show
  ping -qc1 fc04::b1
  ping -qc1 fc05::b2

====== 8 Routen ======

{{:fortgeschrittene:pasted:20230818-145100.png}}
  ip netns add a
  ip netns add b1
  ip netns add b2
  ip netns add c1
  ip netns add c2
  ip netns add d
  ip link add a-b1 type veth peer name b1-a
  ip link add a-b2 type veth peer name b2-a
  ip link add b1-c1 type veth peer name c1-b1
  ip link add b1-c2 type veth peer name c2-b1
  ip link add b2-c1 type veth peer name c1-b2
  ip link add b2-c2 type veth peer name c2-b2
  ip link add c2-d type veth peer name d-c2
  ip link add c1-d type veth peer name d-c1
  ip link set dev a-b1 netns a
  ip link set dev a-b2 netns a
  ip link set dev b1-a netns b1
  ip link set dev b1-c1 netns b1
  ip link set dev b1-c2 netns b1
  ip link set dev b2-a netns b2
  ip link set dev b2-c1 netns b2
  ip link set dev b2-c2 netns b2
  ip link set dev c1-b1 netns c1
  ip link set dev c1-b2 netns c1
  ip link set dev c1-d netns c1
  ip link set dev c2-b1 netns c2
  ip link set dev c2-b2 netns c2
  ip link set dev c2-d netns c2
  ip link set dev d-c1 netns d
  ip link set dev d-c2 netns d

Terminal a:
  ip netns exec a /bin/bash
  ip link set up dev a-b1
  ip addr add fc0a:b1::a/64 dev a-b1

Terminal b1:
  ip netns exec b1 /bin/bash
  ip link set up dev b1-a
  ip addr add fc0a:b1::b1/64 dev b1-a
  ping fc0a:b1::a