This forum rocks. I got numerous replies and everyone suggested we can do it on fly. Thanks to everyone. I tested this on a test server and worked. However I was not permitted to do this on Prod. There was also recommendation to bring up a virutal interface and change netmask of that interface. Command: ifconfig <interface> netmask xxx.xxx.xxx.xxx ifconfig ce0 x.x.x.x netmask x.x.x.x broadcast x.x.x.x Here are couple of replies ____________________________________________________________________ Hi Jason - if you really cannot down the interface try "ifconfig netmask 255.255.255.0" (or whatever your netmask is) then ping -s the broadcast for a bit "ping -s 10.144.1.255" (or whatever you have, then see how you go. Other than that, plumb in a virtual interface "ifconfig ceo:1" then configure with your settings and up this. When you have a scheduled reboot/downtime you can then set the netmask of your "main" interface properly. ----------------------------------------------------------------------- I can only speak from experience, I have reset netmask on the fly but it was usually because the netmask was wrong and there were connectivity problems and it didnt drop any connections. So when I changed and corrected it, things got better, not worst. From reading the man page on ifconfig, it doesnt seem to reset the port like the up or plumb/unplumb options. Make sure you put the right subnet netmask in /etc/netmasks so when you reboot you dont have the same problem. _______________________________________________________ Thanks, J. > Hi Gurus, > Is there any way to change netmask without bringing down the interface? > This what I did lastnight in mid of crises and later realized about netmask > . > ifconfig ce0 plumb > ifconfig ce0 x.x.x.x up > > As of now system communicates within the local network but not outside network. This is a Oracle databas box with Solaris 8. > > Thanks, > J. > --------------------------------- Blab-away for as little as 1"/min. Make PC-to-Phone Calls using Yahoo! Messenger with Voice. _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Tue Apr 11 12:23:19 2006
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