2.0RC1 Multi-Wan: No default gateway/route change after link failure.

sergu61

After May, 18th again the same problem! :(

It was necessary to be rolled away on the Snapshot "pfSense-Full-Update-2.0-RC1-i386-20110517-2328.tgz" - on it the route by default switches automatically:
–--------
May 20 2:36:45 PM pfsense php:: Default gateway down setting 2_GW as default!
May 20 2:36:45 PM pfsense php:: MONITOR: 1_GW is down, removing from routing group

On new (after May, 18th) Snapshots the first line in system.log missed!

Sergu61

eri--

The change has been backed out since it caused issues and i have plans to put a knob under system->advanced to allow enabling it.

Give me time to come to it.

sot010174

@ermal:

The change has been backed out since it caused issues and i have plans to put a knob under system->advanced to allow enabling it.

Give me time to come to it.

Please include a "timed refresh" to this feature. In my case I think it would solve all my problems, something like:

Recheck default gateway route every ___ minutes. (and it would call the auto-change function or write the default gateway route if all gateways are down).

lhodgkins

Hi Guys,
Just curious what the status of this issue is… Has the fix been incorporated into the latest snapshot yet??

sergu61

In the file system_advanced_misc.php
in line:
…..
/>
…..

need to change:
lb_use_sticky -> gw_switch_default.

After that, everything starts to work!

eri--

I just fixed this.

sergu61

Thank you!
Now the system has become even more comfortable!

phospher

Awesome. I've been waiting for this fix as well. How long does it usually take for the snapshot to get built?

Michael Sh.

I'm a little corrected. For me it works better.
1. Restores the configured default gateway, if gateway is up.
2. Bypasses until IPv6 gateways.
3. Will don't touch routing without the need for.


        if (isset($config['system']['gw_switch_default'])) {
        /*
         * NOTE: The code below is meant to replace the default gateway when it goes down.
         *      This facilitates services running on pfSense itself and are not handled by a PBR to continue working.
         */
        $upgw = "";
        $dfltgwfound = false;
        foreach ($gateways_arr as $gwname => $gwsttng) {
            if (is_ipaddrv4($gateways_arr[$gwname]['gateway'])) {
                if (isset($gwsttng['defaultgw'])) {
                        $dfltgwfound = true;
                        if (!stristr($gateways_status[$gwname]['status'], "down"))
                                $upgw = $gwname;
                }
                /* Keep a record of the last up gateway */
                if (empty($upgw) && !stristr($gateways_status[$gwname]['status'], "down"))
                        $upgw = $gwname;
            }
        }
        if ($dfltgwfound == false) {
                $gwname = convert_friendly_interface_to_friendly_descr("wan");
                if (!stristr($gateways_status[$gwname]['status'], "down"))
                        $upgw = $gwname;
        }
        if (!empty($upgw)) {
                if ($gateways_arr[$upgw]['gateway'] == "dynamic")
                        $gateways_arr[$upgw]['gateway'] = get_interface_gateway($gateways_arr[$upgw]['friendlyiface']);
                if (is_ipaddr($gateways_arr[$upgw]['gateway'])) {
                        exec("/usr/bin/netstat -rnf inet | /usr/bin/awk '/default/ {print $2}'", $currgwip);
                        if (!stristr($gateways_arr[$upgw]['gateway'], $currgwip[0])) {
                            log_error("Setting default gateway '{$upgw}' will replace (IP={$currgwip[0]})!");
                            mwexec("/sbin/route delete -inet default; /sbin/route add -inet default {$gateways_arr[$upgw]['gateway']}");
                        }
                }
        }
        unset($upgw, $dfltgwfound, $currgwip, $gwname, $gwsttng);
        }

Test is not easy, unfortunately. Frequent kernel panic when the twitching interfaces.

gdavid

Hi guys. I'm having the same troubles dealing with failover gateway. I followed your discussion and now I can reach the correct behavior of switching to the secondary gateway if the default fails.
As you wrote, I had to declare a default gateway; if I do NOT flag "Default Gateway" on any gateway, no gateway switch is done at all.
So, if I flag "Default Gateway" on one of the gw, the switching is done correctly and the default route is changed. But here arises an issue: when the offline gateways returns online, the routing doesn't come back to this (default) gateway. Never more. Even after minutes and minutes.
As consequence, if the secondary gateway goes down (also after many days), my network is definetly offline from internet access.

It seems that pfSense can't switch away from an offline gateway if it is not the default gateway.
Am I missing something? I really didn't understand if I can patch some php code or this issue is still open …

Many thanks !!!!

Note1: My WANs NICs always stay up
Note2: My "Allow default gateway switching" is flagged on Advanced -> Miscellaneous settings
Running 2.0-RC2 (amd64), built on Tue Jun 7 15:17:21 EDT 2011