Thread: Wired Network disconnected when cable from Switch

hi,

did lot of research resolve "wired network disconnected" issue couldn't find information writing in forum help.

have installed ubuntu 12.10 , have 3 quad nic ethernet card + 1 ethernet port in motherboard, ethernet ports being detected ubuntu , if plug internet cable in port , can browse internet without issue , me understand quad nic cards fine since use port connect internet 1 one, if take cable cisco switch , inject in 1 of quad nic card port, ubuntu shows stauts connecting , shows "wired network disconnected" , keep happening time connecting , disconnected.

on same port if inject internet cable works , shows "wired network connected" won't work when cable coming switch.

read different threads , tried implement sort of solution won't help

looking hope can put me in right direction.

quad nic card specs after running lscp

digital equipment corporation decchip 21142/43 (rev 41)

regards,

posted mnaumanca

hi,

did lot of research resolve "wired network disconnected" issue couldn't find information writing in forum help.

have installed ubuntu 12.10 , have 3 quad nic ethernet card + 1 ethernet port in motherboard, ethernet ports being detected ubuntu , if plug internet cable in port , can browse internet without issue , me understand quad nic cards fine since use port connect internet 1 one, if take cable cisco switch , inject in 1 of quad nic card port, ubuntu shows stauts connecting , shows "wired network disconnected" , keep happening time connecting , disconnected.

on same port if inject internet cable works , shows "wired network connected" won't work when cable coming switch.

read different threads , tried implement sort of solution won't help

looking hope can put me in right direction.

quad nic card specs after running lscp

digital equipment corporation decchip 21142/43 (rev 41)

regards,

you seeing effects of spanning tree protocol (stp). normal activity. there can single active path between 2 network nodes in ethernet lan (subnet). in other words; nodes (endpoint) should have 1 port per lan unless bond ports create single path or fall situation (hot standby).

see here , here stp info.

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Networking & Wireless [ubuntu] Wired Network disconnected when cable from Switch

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