Thread: 12.04 LTS - Wired network disconnects after a period of inactivity

hi all.

since recent patches in last week or 12.04 lts server losing wired network connectivity after few minutes. before network on server rock solid. if leave ping running doesn't happen appears after period of inactivity interface losing connectivity. details of connection requested in post: http://ubuntuforums.org/showthread?t=2079177 shown below:

lspci -nnk | grep -ia2 net

code:

0b:00.0 ethernet controller [0200]: 3com corporation 3c905 100basetx [boomerang] [10b7:9050]     kernel driver in use: 3c59x     kernel modules: 3c59x

lsmod

code:

module                  size  used ip6_tables             18432  0  ebtable_nat            12695  0  ebtables               21508  1 ebtable_nat ipt_masquerade         12663  3  iptable_nat            13016  1  nf_nat                 24959  2 ipt_masquerade,iptable_nat nf_conntrack_ipv4      19084  4 iptable_nat,nf_nat nf_defrag_ipv4         12649  1 nf_conntrack_ipv4 xt_state               12514  1  nf_conntrack           73847  5 ipt_masquerade,iptable_nat,nf_nat,nf_conntrack_ipv4,xt_state ipt_reject             12512  2  xt_checksum            12493  1  iptable_mangle         12646  1  xt_tcpudp              12531  5  iptable_filter         12706  1  ip_tables              18106  3 iptable_nat,iptable_mangle,iptable_filter x_tables               21974  11 ip6_tables,ebtables,ipt_masquerade,iptable_nat,xt_state,ipt_reject,xt_checksum,iptable_mangle,xt_tcpudp,iptable_filter,ip_tables bridge                 79601  0  stp                    12811  1 bridge rfcomm                 38139  0  bnep                   17830  2  bluetooth             158438  10 rfcomm,bnep binfmt_misc            17292  1  vesafb                 13516  1  ppdev                  12849  0  dcdbas                 14098  0  psmouse                86486  0  serio_raw              13027  0  mac_hid                13077  0  parport_pc             32114  1  e7xxx_edac             13008  0  intel_rng              12700  0  edac_core              46858  1 e7xxx_edac shpchp                 32325  0  lp                     17455  0  parport                40930  3 ppdev,parport_pc,lp megaraid_mbox          36082  3  megaraid_mm            17891  1 megaraid_mbox 3c59x                  37445  0  floppy                 60310  0

ifconfig

code:

eth0      link encap:ethernet  hwaddr 00:60:08:07:69:bc             inet addr:192.168.1.248  bcast:192.168.1.255  mask:255.255.255.0           broadcast running multicast  mtu:1500  metric:1           rx packets:9799 errors:0 dropped:103 overruns:0 frame:0           tx packets:7675 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            rx bytes:6580700 (6.5 mb)  tx bytes:2273726 (2.2 mb)           interrupt:16 base address:0xecc0    lo        link encap:local loopback             inet addr:127.0.0.1  mask:255.0.0.0           loopback running  mtu:16436  metric:1           rx packets:100 errors:0 dropped:0 overruns:0 frame:0           tx packets:100 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0            rx bytes:6416 (6.4 kb)  tx bytes:6416 (6.4 kb)   virbr0    link encap:ethernet  hwaddr 26:05:d5:4b:9b:da             inet addr:192.168.122.1  bcast:192.168.122.255  mask:255.255.255.0           broadcast multicast  mtu:1500  metric:1           rx packets:0 errors:0 dropped:0 overruns:0 frame:0           tx packets:0 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0            rx bytes:0 (0.0 b)  tx bytes:0 (0.0 b)

edit: noticed after loses connectivity remote access samba shares on server don't work , network access (and internet access) server slow. restarting networking doesn't fix problem , have reboot things working again.

on how fix appreciated thanks.

posted dakster01

lspci -nnk | grep -ia2 net

code:

0b:00.0 ethernet controller [0200]: 3com corporation 3c905 100basetx [boomerang] [10b7:9050]     kernel driver in use: 3c59x     kernel modules: 3c59x

..
..
ifconfig

code:

eth0      link encap:ethernet  hwaddr 00:60:08:07:69:bc             inet addr:192.168.1.248  bcast:192.168.1.255  mask:255.255.255.0           broadcast running multicast  mtu:1500  metric:1           rx packets:9799 errors:0 dropped:103 overruns:0 frame:0 .. .. virbr0    link encap:ethernet  hwaddr 26:05:d5:4b:9b:da             inet addr:192.168.122.1  bcast:192.168.122.255  mask:255.255.255.0           broadcast multicast  mtu:1500  metric:1

although may not related, kind of virtual machine using? , make difference if disable virtual network test?

posted dakster01

restarting networking doesn't fix problem , have reboot things working again.

have tried -

code:

sudo ifconfig eth0 down sudo ifconfig eth0 up

or,

code:

sudo modprobe -rfv 3c59x sudo modprobe -v 3c59x

also, please clarify part of post -

also noticed after loses connectivity remote access samba shares on server don't work , network access (and internet access) server very slow.

seems confusing.. disconnected, or gets slow? think it'll better if give full setup , connection details pertaining server.

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Networking & Wireless [SOLVED] 12.04 LTS - Wired network disconnects after a period of inactivity

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