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[navi]

Hello,

I have a problem with route monitoring.
Everything is OK when I use interface monitoring or gatway monitoring, but host monitoring
method doesnt work correctly.

My configuration:

Firmware Version:     2.27.02.11-14417 Aug 23 2010
 
ISP1 xdsl line ->  modem -> WAN1
ISP2 adsl line ->  modem -> WAN2

I've 2 routing tables.

1. main(default)
  M   0.0.0.0/0          wan1           1.1.1.1                  80
       0.0.0.0/0          wan2           2.2.2.2                  90

and
2. WWW-wan2
  M   0.0.0.0/0         wan2           2.2.2.2                   80
      0.0.0.0/0          wan1           1.1.1.1                   90

There is a routing rule to forward http traffic via WWW-wan2 table.


When I unplug adsl line from modem(ISP2), dfl-800 (based on host monitoring) recognize
route failure after ~30s, mark first route in WWW-wan2 table as X(disabled) and move
http trafic to second route (wan1).

X M   0.0.0.0/0         wan2           2.2.2.2                   80
      0.0.0.0/0          wan1           1.1.1.1                   90

Unfortinatly after another 10 seconds, first route is enable again

I run sniffer to see what's happening.
When first route is disabled, dfl-800 keeps trying to ping monitored hosts via wan2.
When dfl-800 gets "destination unreachable" answers for his ICMP echo requests, route is re-enabled.
It looks like it dosen't matter if the answer is:
Type: 0 (Echo (ping) reply)
Code: 0 ()

or
Type: 3 (Destination unreachable)
Code: 0 (Network unreachable).


Monitoring configuration:

First route in WWW-wan2 table is monitored with:
Monitor Interface Link Status
Monitor Gateway using ARP
"enable host monitoring"
grace period 5 seconds
Minimum Number of Hosts Reachable: Specific 2

Monitored Hosts tab: hosts 3.3.3.3, 4.4.4.4, 5.5.5.5
method ICMP
Polling Interval: 10000ms
Samples: 10
Max Poll Fails: 2
Max Average Latency: 1000ms


Am I doing something wrong, or this is a bug in firmware?

Navi

[navi]

Nobody used host monitoring with success ?

[chechito]

I use host monitoring succesfully but i dont have de unreachable host answer from de gateway

[lingnau]

Did you set both routes as monitored? Why?

Here´s my setup on a DFL-210 workind just fine:

#                       IF              Dest         Gw                                   Monitored
2    Route    dmz_wan    all-nets    dmz_wan2_gw       80   Yes   
4    Route    wan            all-nets    wan_gw               90   No

By default route 2 is used, if i cant reach the specified host on route 2, route 2 is disabled and route 4 is aplied, if route 4 fails, fuuuu...

[chechito]

try to investigate isp settings on modem

some times changing the CPE (modem) settings to bridge and letting the firewall to do the pppoe process or get de ip address directly give you goog results, normally ISP dont help to do this process