11-13-2014 09:54 AM
hi, i would like to better understand how "network service detection" and “Protocol Binding” work. i have already read the documentation but it isn't very clear for me. In particular i would like understand
In my opinion the rv042 works in this way, i.e.
In particular for a selected “IP address type" on a working interface it works in this way: the RV042 makes a ping test i.e. sends 5 echo and waits the echo replies. If at least one echo reply is received, the WAN interface is considered healthy.
The same thing will happen with other WAN interface that it will be checked against the IP address types specified on the related page.
Now let us see what happen if at least one ping test doesn’t work.
if the ping test fail (i.e. all the echo replies isn't received), for at least one of the selected IP address type, the RV042 detects a fail and it stops sending data on that WAN interface.
That it means that from the last check up the Elapsed time needed to detect a failed WAN is about Retry timeout + T0.
Now If I choose, on the “When fail” option, “Remove the Connection”, failover occurs and only the other WAN interface is used for all the packet.
If I’m using “Protocol Binding” it means that all the traffic bind on the failed WAN interface will start going through the other working WAN interface. E.g if I bind the ftp protocol on WAN2 interface and network service detection detect a fail on that interface(base on the IP address type selected) the new ftp session will use WAN1 to reach its destination (I say new session because the new session will use the IP address of WAN1 interface).
This ftp session will go through WAN1 until it is terminated even if WAN2, checked again its criteria, start work again.
That is fine for that ftp session, but I don’t know what it happens to a new ftp session that start after WAN1 is recovered and before the ftp session through WAN2 is terminated. I mean,which path is selected? the one specified on the bind rules of WAN1 interface or it follows again the failover rules (WAN2)?
please let me know if i 'm right and clarify where i haven't understood the topic
thanks in advance
andrea
11-15-2014 02:57 PM
there isn't any contribution?
11-15-2014 05:52 PM
Hello,
Not sure if you had a chance to review the below document:
http://sbkb.cisco.com/CiscoSB/GetArticle.aspx?docid=d6c17b6ee53141f59ae03c6defeb20cb_Dual_WAN_Configuration_on_RV320_Router.xml&pid=2&converted=0#Network_Service_Detection
Nagaraja
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