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Top Forums UNIX for Advanced & Expert Users Loopback Interface...Vanished??? Post 28630 by silvaman on Saturday 21st of September 2002 11:18:52 AM
Old 09-21-2002
Loopback Interface...Vanished???

Recently I noticed that my internet connection would not work correctly-although connected domain names could not be resolved. My resolv.conf file was fine since it is configured every time I dial up. a closer inspection showed that my loopback interface had disappearerd! Any ideas why would this be? Although I could bring it back by restarting networking ..I never had to do this before as loopback was always configured on boot.

If I opt to now configure networking on boot then eth0 will also try to configure itself which I dont want outside of work! I can manually do 'ifconfig lo up' but I never had to do this before either...so where has my loopback gone Smilie ? I am running redhat 7.3

any pointers greatly appreciated
 

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ATMLOOP(8)						       Maintenance Commands							ATMLOOP(8)

NAME
atmloop - get/set loopback mode of ATM interfaces SYNOPSIS
atmloop -s [-l level] [-r level] [itf] atmloop [itf] atmloop -q [itf] atmloop -V DESCRIPTION
atmloop sets or shows the current loopback settings of an ATM interface, and allows to query the loopback modes supported by the interface. Some ATM cards can be configured to echo data back to the driver (local loopback) or to the network (remote loopback). The echoing may be done at several different levels: aal AAL PDUs atm ATM cells digital bits sent to or received from the line interface analog the analog signal The levels supported by an interface can be queried with the -q option. If invoked without options, atmloop displays the current loopback settings. OPTIONS
-s set loopback mode. Followed by either -l or -r, both options to set local and remote loopback at the same time (if supported by the driver), or none of them to turn off any loopback. -l level enable local loopback. -r level enable remote loopback. -q level query loopback levels supported by the interface. -V print version number of atmloop on standard output and exit. AUTHOR
Werner Almesberger, EPFL ICA <Werner.Almesberger@epfl.ch> SEE ALSO
atmdiag(8), sonetdiag(8) Linux April 26, 2000 ATMLOOP(8)
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