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-rwxr-xr-xdoc/demo.sh27
1 files changed, 15 insertions, 12 deletions
diff --git a/doc/demo.sh b/doc/demo.sh
index 83f9e78..de5f546 100755
--- a/doc/demo.sh
+++ b/doc/demo.sh
@@ -84,18 +84,21 @@ nft add chain "${ns}_nat" postrouting '{ type nat hook postrouting priority -100
nft add rule "${ns}_nat" postrouting ip saddr "${ipv4_ns}" masquerade
ipv6_addr="$(ipv6_devaddr "$(ipv6_dev)")"
-ipv6_passt="$(ipv6_mangle "${ipv6_addr}" ${ns_idx})"
-ndp_setup "${ipv6_passt}" "veth_${ns}"
-ip -n "${ns}" addr add "${ipv6_passt}/$(ipv6_mask "${ipv6_addr}")" dev "veth_${ns}"
-ip addr add "${ipv6_addr}" dev "veth_${ns}"
-ip route add "${ipv6_passt}" dev "veth_${ns}"
-passt_ll="$(ipv6_ll_addr "veth_${ns}")"
-main_ll="$(get_token "link/ether" $(ip -o li sh "veth_${ns}"))"
-ip neigh add "${passt_ll%%/*}" dev "veth_${ns}" lladdr "${main_ll}"
-ip -n "${ns}" route add default via "${passt_ll%%/*}" dev "veth_${ns}"
-
-sysctl -w net.ipv6.conf.all.forwarding=1
-
+if [ -n "${ipv6_addr}" ]; then
+ ipv6_passt="$(ipv6_mangle "${ipv6_addr}" ${ns_idx})"
+ ndp_setup "${ipv6_passt}" "veth_${ns}"
+ ip -n "${ns}" addr add "${ipv6_passt}/$(ipv6_mask "${ipv6_addr}")" dev "veth_${ns}"
+ ip addr add "${ipv6_addr}" dev "veth_${ns}"
+ ip route add "${ipv6_passt}" dev "veth_${ns}"
+ passt_ll="$(ipv6_ll_addr "veth_${ns}")"
+ main_ll="$(get_token "link/ether" $(ip -o li sh "veth_${ns}"))"
+ ip neigh add "${passt_ll%%/*}" dev "veth_${ns}" lladdr "${main_ll}"
+ ip -n "${ns}" route add default via "${passt_ll%%/*}" dev "veth_${ns}"
+
+ sysctl -w net.ipv6.conf.all.forwarding=1
+else
+ ipv6_passt=
+fi
ethtool -K "veth_${ns}" tx off
ip netns exec "${ns}" ethtool -K "veth_${ns}" tx off