arplookup problems

From: Daemon (daemon_at_foxchat.net)
Date: 09/27/05

  • Next message: Dave+Seddon: "Re: arplookup problems" 
    Date: Tue, 27 Sep 2005 02:44:54 -0400
To: freebsd-net@freebsd.org

    I hope this is the correct list to post to, if not, I apologize. I've
    had an ongoing problem with arplookup for some months now and as of yet,
    haven't been able to find anything on the web concerning my particular
    problem. Every 24 hours, almost to the minute, I get the following errors;

    *Note This proceeds each arplookup failure
    em0: Link is Down
    em0: Link is up 100 Mbps Full Duplex

    Sep 25 01:32:49 thisbox kernel: arplookup 169.0.0.1 failed: host is not
    on local network
    Sep 25 01:33:05 thisbox kernel: arplookup 10.32.240.171 failed: host is
    not on local network
    Sep 26 01:23:37 thisbox kernel: arplookup 169.0.0.1 failed: host is not
    on local network
    Sep 26 01:23:49 thisbox kernel: arplookup 10.32.240.171 failed: host is
    not on local network
    Sep 27 01:23:35 thisbox kernel: arplookup 169.0.0.1 failed: host is not
    on local network
    Sep 27 01:23:48 thisbox kernel: arplookup 10.32.240.171 failed: host is
    not on local network

    When this happens, one by one, each of my (ssh, gaim, irc, etc.)
    connections time out until every connection is dead. I'm using
    RoadRunner Business Class with a static IP on em0 and an internal subnet
    172.16.XXX.XXX on em1. I was getting the errors on two older nics I
    had, so I bought new nics in hopes that would correct the problem. I
    was running FreeBSD 5.4-Release p7 and switched to FreeBSD 5.4-STABLE
    about a week ago. I'm running the most current DHCP server, IPFW2, and
    NATD.

    I have the following in /etc/sysctl.conf
    kern.polling.enable=1
    net.inet.tcp.syncookies=0
    net.inet.udp.blackhole=1
    net.inet.tcp.blackhole=2
    # TCP send and receive spaces
    net.inet.tcp.sendspace=1048576
    net.inet.tcp.recvspace=1048576
    # Socket queue defense against SYN attacks
    kern.ipc.somaxconn=1024
    # Redirects
    net.inet.icmp.drop_redirect=1
    net.inet.icmp.log_redirect=1
    net.inet.ip.redirect=0
    # Subnet
    net.link.ether.bridge_cfg=em0,em1
    net.link.ether.bridge.enable=0
    net.link.ether.bridge.ipfw=0
    net.link.ether.ipfw=1
    # ARP cleanup
    net.link.ether.inet.max_age=1200
    # Source routing
    net.inet.ip.sourceroute=0
    net.inet.ip.accept_sourceroute=0
    # Broadcast ECHO response
    net.inet.icmp.bmcastecho=0
    # Other broadcast probes
    net.inet.icmp.maskrepl=0
    net.inet.ip.fw.dyn_ack_lifetime=3600
    net.inet.ip.fw.dyn_buckets=1024
    net.inet.ip.fw.one_pass=0

    I have the following in my kernel conf;
    # Firewall Stuff
    options IPFIREWALL_DEFAULT_TO_ACCEPT
    options IPFIREWALL
    options IPFIREWALL_FORWARD
    options IPFIREWALL_FORWARD_EXTENDED
    options IPFIREWALL_VERBOSE
    options IPFIREWALL_VERBOSE_LIMIT=10
    options IPDIVERT
    options DUMMYNET
    options BRIDGE
    options IPSTEALTH
    options HZ=1000
    options DEVICE_POLLING

    It is probably a bad idea to post my /etc/rc.conf ifconfig info here,
    but since I'm almost positive that in order for someone to help me track
    this down, they're going to want/need to know what is in there, I'll
    wait in hopes of a response first.

    Regards,

    Mark
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