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

    Send error 55 with vtnet

    Scheduled Pinned Locked Moved General pfSense Questions
    2 Posts 1 Posters 1.1k 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.
    • F
      fredshed1
      last edited by

      Hi guys,

      I've been having problems with my pfSense 2.2 test pair where CARP will automatically demote itself with the following message:
      kernel: carp: demoted by 240 to 240 (send error 55 on vtnetX)

      where X is the interface number. The machine has 3 vtnet interfaces and this happens on both interfaces using CARP IP addresses (LAN and WAN). The third interface is for pfsync only.

      I have worked around the problem by setting the net.inet.carp.senderr_demotion_factor sysctl to 0 which stops the demotion but the errors are still there:
      kernel: carp: demoted by 0 to 0 (send error 55 on vtnet0)
      The Internet suggests that this may be a problem with mbuf shortages but RRD graphs say only ~5% mbuf usage.

      I am worried that this indicates an underlying problem with the network drivers. This system is not heavily loaded - it usually has 4-12mb/s throughput at ~1000pps.

      I see this with both pfSense systems in this pair. Both are running in KVM VMs on CentOS 6. One is on HP DL360 G5 hardware, the other HP DL360 G7. Both are now running the latest build of pfSense but this problem has been present for several weeks (perhaps more).

      1 Reply Last reply Reply Quote 0
      • F
        fredshed1
        last edited by

        This problem is still present on 2.2-RELEASE.

        1 Reply Last reply Reply Quote 0
        • S SteveITS referenced this topic on
        • First post
          Last post
        Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.