こんな感じでつなげてるけどな
port 1194
proto udp
dev tap2
ca keys/ca.crt
cert keys/server.crt
dh keys/dh1024.pem
server-bridge 192.168.0.100 255.255.255.0 192.168.0.105 192.168.0.110
ifconfig-pool-persist ips/1194.txt

client-to-client
keepalive 10 120
comp-lzo
user nobody
group nogroup
persist-key
persist-tun

log-append /var/log/openvpn/1194.log
verb 3
crl-verify keys/crl.pem

key keys/server.key
tls-auth keys/ta.key
cipher BF-CBC
log /var/log/openvpn/1194.log

とりあえず、push "route-gateyway 172.31.34.100" はずして、redirect-gatewayは無くしてみたら？