Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    Multiple wan causing packet loss

    Scheduled Pinned Locked Moved Routing and Multi WAN
    1 Posts 1 Posters 509 Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • C
      Cheetohz
      last edited by

      I am preparing to migrate to a new modem, new speed tier, etc with the same ISP. I have dynamic addressing for both.

      Previously, I just had a very simple setup. Modem via ethernet to em1(WAN) on pfsense.

      What i've done now is set up multiple vlan on my switch

      vlan 48 - untagged port 48, tagged port 46, port 47 not member
      vlan 47 - untagged port 47, tagged port 46, port 48 not member
      vlan 46 - untagged port 46, port 47&48 not member

      on pfsense I have em0(LAN) and em1(WAN)
      I have created 2 vlans on pfsense, vlan48(wan1) and vlan47(wan2) both of which have em1(WAN) as the parent interface
      vlan priority is set to 0 for all, as I don't see it being needed here.

      I have enabled all 3 interfaces.
      em1(WAN) has a unique mac (00deadbeef00) ipv4 and ipv6 set to none and hostname has been set as host5.domain.com
      em1(wan1) has a unique mac (11deadbeef11) ipv4 is set to dhcp and ipv6 is set to none. Hostname is also set to host5.domain.com
      em1(wan2) has a unique mac (22deadbeef22) ipv4 is set to dhcp and ipv6 is set to none. Hostname is also set to host5.domain.com

      I have created a gateway group (WanGroup1)
      I have set wan1_dhcp and wan2_dhcp both to Tier 1 and triggered on packet loss or latency. wan_dhcp is set to never

      Now currently the modem on the other end of wan1 is unprovisioned, it is not giving a valid dhcp lease.
      The modem on wan2 is provisioned and giving a public IP.

      When ethernet is plugged into wan2, i get a great connection. 0% packet loss, amazing ping times.
      When I plug ethernet into wan1, I start to see unacceptable amounts of packet loss, sometimes 15%, sometimes 60% it jumps around. I am still able to browse the web, I am able to ping external hosts, but with a lot of loss.

      I've tested and even swapped multiple known good cables, thinking it was a cable issue, but it is not. Whenever both links are plugged in, I see this behavior. Is it something in my settings? What should I be looking at here? I am noticing cpu utilization has risen significantly while preforming these tests.

      Good news in, I've been able to get some progress done on some much needed cable management while diagnosing this.
      Util.JPG
      Util.JPG_thumb
      expected.JPG
      expected.JPG_thumb
      pktlss.JPG
      pktlss.JPG_thumb

      1 Reply Last reply Reply Quote 0
      • First post
        Last post
      Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.