Testing End.AM with PSP

setup-endam-with-psp.sh

#!/bin/bash

ip=/sbin/ip
ipns="$ip netns exec"

function make_netns() {
	ns=$1

	echo create netns $ns

	if [ -e /var/run/netns/$ns ]; then
		$ip netns del $ns
	fi
	sleep 0.5
	$ip netns add $ns
	$ipns $ns $ip link set dev lo up
}

function make_patch() {
	va=$1
	vb=$2
	nsb=$3

	echo create patch between $va and $vb in ns $nsb

	if [ -e /sys/class/net/$va ]; then
		$ip link del dev $va
	fi

	$ip link add $va type veth peer name $vb
	$ip link set dev $vb netns $nsb
	$ip link set dev $va up
	$ipns $nsb $ip link set dev $vb up
}

function make_br0_on_ns() {
	ns=$1
	la=$2
	lb=$3
	
	$ipns $ns $ip link add br0 type bridge
	$ipns $ns $ip link set dev $la master br0
	$ipns $ns $ip link set dev $lb master br0
	$ipns $ns $ip link set dev br0 up
	$ipns $ns $ip link set dev $la up
	$ipns $ns $ip link set dev $lb up
}

function get_mac() {
	link=$1

	echo `ip a s dev $link | grep ether | cut -d ' ' -f 6`
}

function get_ip6() {
	link=$1

	echo `ip -6 a s $link | grep inet6 | grep -v fe80 | cut -d ' ' -f 6 | cut -d '/' -f 1`
}

# Test Topology
#
# +-----------+       +-----------+
# |    nf2    |       |    nf1    |
# |           |       |           |
# |    br0    |       |    br0    |
# |   +---+   |       |   +---+   |
# |   |   |   |       |   |   |   |
# +-----------+       +-----------+
# f22b|   |f21b       f12b|   |f11b
#     |   |               |   |
# f22a|   |f21a       f12a|   |f11a
# +-------------------------------+
# |                               |
# |         default netns         |
# |         End.AM proxy          |
# |                               |
# +-------------------------------+
#    e2a|                   |e1a
#       |                   |
#       |fc00:e2::/64       |fc00:e1::/64
#       |                   |
#    e2b|                   |e1b
# +-----------+       +-----------+
# |           |       |           |
# |   edge2   |       |   edge1   |
# |           |       |           |
# +-----------+       +-----------+
#
# from edge1 to edge2, segment list is fc00:1::,fc00:2::
# fc00:1:: is End.AM for f11a
# fc00:2:: is End.AM for f21a

for ns in edge1 edge2 nf1 nf2; do
	make_netns $ns
done

make_patch e1a e1b edge1
make_patch e2a e2b edge2

make_patch f11a f11b nf1
make_patch f12a f12b nf1
make_br0_on_ns nf1 f11b f12b

make_patch f21a f21b nf2
make_patch f22a f22b nf2
make_br0_on_ns nf2 f21b f22b


vrfa=vrfa
vrfb=vrfb
echo setup VRF $vrfa and $vrfb for IFACE-IN and End.AM route

if [ -e /sys/class/net/$vrfa ]; then
	$ip link del dev $vrfa
	sleep 0.5
fi

if [ -e /sys/class/net/$vrfb ]; then
	$ip link del dev $vrfb
	sleep 0.5
fi

$ip link add dev $vrfa type vrf table 10
$ip link add dev $vrfb type vrf table 11
$ip link set dev $vrfa up
$ip link set dev $vrfb up

$ip link set dev f11a master $vrfa
$ip link set dev f21a master $vrfa
$ip link set dev f12a master $vrfb
$ip link set dev f22a master $vrfb

echo setup ip adderss for edge namespaces
$ip -6 addr add dev e1a fc00:e1::1/64
$ip -6 addr add dev e2a fc00:e2::1/64

$ipns edge1 $ip -6 addr add dev e1b fc00:e1::2/64
$ipns edge1 $ip -6 route add to default via fc00:e1::1
$ipns edge2 $ip -6 addr add dev e2b fc00:e2::2/64
$ipns edge2 $ip -6 route add to default via fc00:e2::1

echo setup ip address for nf1 and nf2 links
$ip -6 addr add dev f11a fc00:f1::1/64
$ip -6 addr add dev f12a fc00:f1::2/64
$ip -6 addr add dev f21a fc00:f2::1/64
$ip -6 addr add dev f22a fc00:f2::2/64

echo setup End.AM routes
f12a_mac=`get_mac f12a`
f22a_mac=`get_mac f22a`
#$ip -6 route add to fc00:1:: encap seg6local action End.AM oif f11a mac $f12a_mac dev f11a
#$ip -6 route add to f22:: encap seg6local action End.AM oif f21a mac $f22a_mac dev f21a

# NH6 mode
f12a_ip6=`get_ip6 f12a`
f22a_ip6=`get_ip6 f22a`
$ip -6 route add to fc00:1:: encap seg6local action End.AM \
	nh6 $f12a_ip6 table 10 dev f11a
$ip -6 route add to fc00:2:: encap seg6local action End.AM \
	nh6 $f22a_ip6 table 10 dev f21a


echo setup End.T route on both $vrfa and $vrfb
$ip -6 route add vrf $vrfa to default encap seg6local action End.T \
	table 254 flavors PSP dev f12a
$ip -6 route add vrf $vrfb to default encap seg6local action End.T \
	table 254 flavors PSP dev f12a


echo setup T.insert on edge2
$ipns edge2 ip -6 route add to fc00:e1::2 encap seg6 mode inline \
	segs fc00:1::,fc00:2:: dev e2b 


echo do sudo ip netns exec edge2 ping6 fc00:e1::2, and tcpdump fXXa,b links