Iproute2 and tunctl interface

Hello everybody's

I recently install the last GNS3 version on my Ubuntu laptop and try to create a lab with 2 cloud.
Each cloud are attach to a tap interface create with tunctl, and connect to a emulate router.
But i have some problem to make default route efficient for each tap interface with iproute2.

Thereafter my configuration:

Code:

---

        echo "Configure interface"
        ip a add 192.168.4.2/24 dev tap0
        ip l set tap0 up
        ip a add 192.168.5.2/24 dev tap1
        ip l set tap1 up
        echo ""

        echo "Activate network route"
        ip r add 192.168.4.0/24 dev tap0
        ip r add 192.168.5.0/24 dev tap1
        echo ""
        ip r add default via 192.168.4.1 dev tap0 table lan
        ip r add default via 192.168.5.1 dev tap1 table lan_client

        echo "Create iptables rules"
        iptables -t mangle -A OUTPUT -o tap0 -j MARK --set-mark 1
        iptables -t mangle -A OUTPUT -o tap0 -j DSCP --set-dscp-class EF
        iptables -t mangle -A OUTPUT -o tap1 -j MARK --set-mark 2
        iptables -t mangle -A OUTPUT -o tap1 -j DSCP --set-dscp-class CS7
        echo ""

        echo "Create ip rule rules"
        ip rule add fwmark 1/0xff dev tap0 table 200
        ip rule add fwmark 2/0xff dev tap1 table 201
        echo ""

---

But when i try to ping any address who don't figure in my network the packet doesn't go out.

Ps: i edit the rt_tables file correctly with 200 lan and 201 lan_client

If any one have some idea .... ;-)