OPNsense Forum

Archive => 23.7 Legacy Series => Topic started by: crash on November 15, 2023, 10:36:38 PM

Title: PPPOE MultiWan with same upstream gateway address.
Post by: crash on November 15, 2023, 10:36:38 PM
so, I have multiple lines from the same ISP for WAN. and they all use pppoe and get assigned a random IP and gateway and most of the time there are two or more lines sharing the same upstream gateway address .(interfaces themselves have different addresses but same IPV4 Gateway)
I have setup MultiWAN according to the wiki but I was having some random timeout issues.
after looking around it seemed that multiwan with same gateway ip is not possible HOWEVER I have also found (on pfsense wiki) that pppoe is an exception to that rule.

so Is this an opnsense only issue?

or Im just doing something wrong.
Title: Re: PPPOE MultiWan with same upstream gateway address.
Post by: doktornotor on November 16, 2023, 08:53:04 AM
You need to set up GW monitoring (dpinger) to use something else than the GW address. They don't provide MLPPP instead of this madness?
Title: Re: PPPOE MultiWan with same upstream gateway address.
Post by: crash on November 16, 2023, 06:49:50 PM
Gateway monitoring uses different public dns IPs for their monitoring address.

However if I have all the pppoe wans up and lets say 2 share the same upstream gateway IP, if I were to put this gateway group as my LAN's gateway in firewall rules I would get intermittent internet on lan clients (websites load now and you a second later you cant load any websites (or ping anywhere) for few seconds and this cycle repeats), until I disable gateways sharing same upstream IP and things will start working again.

and no, no MLPPP here.
Title: Re: PPPOE MultiWan with same upstream gateway address.
Post by: doktornotor on November 16, 2023, 07:08:12 PM
- You need a separate IP for monitoring for each and every WAN which (randomly) shares the same GW.
- Public DNS servers may be rate-limiting pings -- because they are not ping servers.

Other than that, good luck. 
Title: Re: PPPOE MultiWan with same upstream gateway address.
Post by: crash on November 17, 2023, 03:31:06 PM
Quote from: doktornotor on November 16, 2023, 07:08:12 PM
- You need a separate IP for monitoring for each and every WAN which (randomly) shares the same GW.
- Public DNS servers may be rate-limiting pings -- because they are not ping servers.

Other than that, good luck.
I have a different IP on each separate WAN already.
and I never had issues with using public dns severs for gateway monitoring.
Title: Re: PPPOE MultiWan with same upstream gateway address.
Post by: mike873 on March 24, 2024, 05:01:28 PM
Hey I hava a same setup as you, I'm trying to migrate from pfsense to opnsense, but stuck at the same problem, did you find a way to solve this issue ? or is it that opnsense doesn't support this kind of config ? Thanks