URGENT: protocol forward between dual providers??...........

RouterOS General
1

Sorry to start this topic with urgent Title, but i believe as much as everything else counts in my situation “Time” has a major count!


in a network with two providers each with its own ip and gateway, how can i forward “ICMP” requests to one provider and let everything else do its normal work functioning through the other provider?

this way, when one subscriber’s station is using a mean for its world wide communication that relies mainly on ping timing, will benifit from the fast reply from one provider while the rest of his/her data flow will take place on provider number 2.

I would appreciate a simple code as a jump start.


Thank you,

2

use routing-mark in mangle to mark icmp packets. And add route with that routuing mark to route over second gateway.
You can find similar examples in the wiki
http://wiki.mikrotik.com/wiki/User/Routing

3

Let me get his correct:

ip address add address=22.22.22.50/29 interface=WAN-ICMP
ip address add address=33.33.33.50/29 interface=WAN-Data




ip route add dst-address=0.0.0.0/0 gateway=22.22.22.49
ip route add dst-address=0.0.0.0/0 gateway=33.33.33.49




ip firewall add chain=prerouting src-address=192.168.0.0/16 protocal=icmp   action=mark-routing new-routing-mark=WAN-ICMP
ip firewall add chain=prerouting src-address=192.168.0.0/16 protocal=!icmp  action=mark-routing new-routing-mark=WAN-Data

what will be my mistakes here and what are my next steps after marking them?

Thanks,

4

You don’t need second mangle rule.

And route with routing mark is missing

/ip route add gateway=22.22.22.49 routing-mark=WAN-ICMP

5

If i said route icmp to WAN-ICMP as:

/ip route add gateway=22.22.22.49 routing-mark=WAN-ICMP

will the network automatically know data flow should got through WAN-Data or there is also another rule I must add?

thank you

6

Oh I think the one masqurate rule on WAN-Data should do the job without any extra rule correct?

7

ok, lets try to solve it in a different way…

If you want you can give a high priority to ICMP…

for ex:

/ip firewall mangle
add chain=prerouting protocol=icmp action=mark-connection new-connection-mark=icmp-con passthrough=yes comment="ICMP_Mark_Con" disabled=no
add chain=prerouting protocol=icmp connection-mark=icmp-con action=mark-packet new-packet-mark=icmp-pkt passthrough=no comment="ICMP_PKT_Mark" disabled=no 

/queue tree
add burst-limit=0 burst-threshold=0 burst-time=0s disabled=no limit-at=1024k max-limit=2048k name=Hi_Priority_to_icmp packet-mark=icmp-pkt parent=global-in priority=1 queue=default