RHEL4 - Virtual Interfaces?

Andyt_uk · 28 Jun 2011 at 14:21

Just a quick one, does anyone know if there is a limitation on the number of virtual interfaces that you can add to a RHEL4 machine? I can't find any docs about possible limitations on the RedHat site so far.

Cheers,

AndrewP · 28 Jun 2011 at 15:36

Not run into one before, how many were you planning on adding? Have had 400+ loopback aliases configured on RHEL 5 without problems, for what that's worth.

Andyt_uk · 7 Jul 2011 at 15:10

Sorry for the long delay in replying... I totally forgot about this thread. I'm looking to add ~10,000 addresses at the moment for some testing.

Did you use a script to add your interfaces or did add a ifcfg-eth0-range config?

AndrewP · 7 Jul 2011 at 20:51

That's a fair few, I suspect only trying it will give a definitive answer! I used range configs.

Andyt_uk · 8 Jul 2011 at 17:08

well i managed to add a /19 to the box which is 8190 IP's. Tried the /18 but it complained.

Code if anyone is interested.

Y=0 ; for OCT3 in `seq 64 95` ; do for OCT4 in `seq 1 255` ; do echo -en "DEVICE=eth0:${Y} \nIPADDR=172.30.${OCT3}.${OCT4}\nNETMASK=255.255.0.0\n\n" >> ifcfg-eth0:${Y} ; Y=`expr $Y + 1` ; done ; done

101001101 · 8 Jul 2011 at 21:14

Ha ha thats awesome!

Thanks for the code