two tun tunnels, change route without interrupt tcp sessions

nmn

Hello
I have two tunnels
tun1 (10.0.1.2) tun2(10.0.2.2) on client, i want to change routing between them without interrupt tcp sessions.

As i understand i need another network on server and client in order to tcp endpoints(src ip:port, dst ip:port) on both sides not to change(as i know it's the mandatory condition to keep tcp session).
For example i assign 192.168.1.1 (server), 192.168.1.2 (client) on lo:0
And try to do(client):

ip route add 192.168.1.1 dev tun1 src 192.168.1.2

But i don't see packets on the server.
Maybe you know better solution for my problem ?

nmn

Ok. My main goal is to change routing all traffic from one tunnel to another without tcp session interruption.
Server:
First tunnel:
local [ip]
port 1194
proto tcp

dev tun1

keepalive 10 60

ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt
cert /etc/openvpn/easy-rsa/2.0/keys/server.crt
key /etc/openvpn/easy-rsa/2.0/keys/server.key
dh /etc/openvpn/easy-rsa/2.0/keys/dh2048.pem

server 10.0.1.0 255.255.255.0

comp-lzo

Second tunnel:
local [ip]
port 1195
proto tcp

dev tun2

keepalive 10 60

ca /etc/openvpn/easy-rsa/2.0/keys/ca.crt
cert /etc/openvpn/easy-rsa/2.0/keys/server.crt
key /etc/openvpn/easy-rsa/2.0/keys/server.key
dh /etc/openvpn/easy-rsa/2.0/keys/dh2048.pem

server 10.0.2.0 255.255.255.0

comp-lzo

client:
first tunnel:
client
proto tcp
dev tun1
remote remoteip 1194
resolv-retry infinite
nobind
persist-key
persist-tun
ca /etc/openvpn/keys/ca.crt
cert /etc/openvpn/keys/user1.crt
key /etc/openvpn/keys/user1.key
comp-lzo

second tunnel
client
proto tcp
dev tun2
remote remoteip 1195
resolv-retry infinite
nobind
persist-key
persist-tun
ca /etc/openvpn/keys/ca.crt
cert /etc/openvpn/keys/user2.crt
key /etc/openvpn/keys/user2.key
comp-lzo

When both of tunnel are up i get such tun configuration:

12: tun1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100
    link/[65534]
    inet 10.0.1.6 peer 10.0.1.5/32 scope global tun1
13: tun2: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 100
    link/[65534]
    inet 10.0.2.6 peer 10.0.2.5/32 scope global tun2

I need to change routing from client to server transparently(without tcp session interruption), therefore i should not use 10.0.1.1 and 10.0.2.1

I set on the server lo:0 as 192.168.1.1

ip add show lo
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet 192.168.2.1/32 brd 192.168.2.1 scope global lo:0

client:
ip addr show lo

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet 192.168.2.2/32 brd 192.168.2.2 scope global lo:0

client: ip route add 192.168.1.1/32 dev tun1 src 192.168.2.2

tcpdump on server doesn't show anything.