i recently upgraded from rh4.2 to rh5.2 and have since upgraded the
kernel to 2.2.1. i have no loopback on bootup. 'ifconfig' returns
nothing. netcfg (nettool ??) shows the loopback and my eth0 as
present but lo does not activate when i click 'activate'.
i've tried doing 'ifconfig lo up'; it creates the loopback but 'ping
localhost' gives errors (network unreachable, i think) and 'telnet
localhost' immediately closes the connection. i tried also doing
'route add 127.0.0.1' but i get an SIOADD??? (don't remember exactly)
i've found the ifcfg-lo in /etc/sysconfig/network-scripts, but i don't
know when this is called and by whom.
sheesh, in rh4.2, loopback was never an issue. now, i can't get any
work done! can someone give me some hints on how and when the
loopback device is created?? i have changed the config of the kernel
(enabled smp, sound, network card, etc) but i didn't see any config
options for the network loopback. (there is a loopback but it's used
for block devices; drives, etc, i believe.)