On Sat, 2005-10-15 at 09:06 +1000, david walcroft wrote: > Jeff Vian wrote: > > On Fri, 2005-10-14 at 15:24 -0400, Ki Il Song wrote: > > > >>The subnet mask is: 255.255.255.248 > >>The ip address i want to assign is: 70.88.225.1 > >> > >>So what should my broadcast and network addresses be? > >> > > > > broadcast of 70.88.255.7 > > network of 70.88.255.0 > > > > > > For assistance in the future a quick google search for "subnet > > calculator netmask" yielded over 16,000 results with the first page > > including at least 7 on-line calculators that can determine the answer > > to your question. > Strange : I did the exact same search '"subnet calculator netmask" ' and > found '0' > > david > Sorry for not being clear. The 3 words were not quoted in my search. I wanted to find things with all 3 words, not with the exact phrase. In the sentence above I used quotes to identify the words and was not clear enough that the search was for words and not a phrase. > > > > >>Regards, > >>Ki Song > >> > >>---------- > >>Knifecenter, Inc. > >>5111 Berwyn Road STE 110 > >>College Park, MD 20740 > >>(301) 486-0901 > >>ki@xxxxxxxxxxxxxxx > >> > >> > >>>From: Alan Horn <ahorn@xxxxxxxxxx> > >>>Reply-To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx> > >>>Date: Fri, 14 Oct 2005 12:03:29 -0700 (PDT) > >>>To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx> > >>>Subject: Re: IP Address Config > >>> > >>> > >>>On Fri, 14 Oct 2005, Ki Il Song wrote: > >>> > >>> > >>>>Date: Fri, 14 Oct 2005 14:44:32 -0400 > >>>>From: Ki Il Song <ki@xxxxxxxxxxxxxxx> > >>>>Reply-To: For users of Fedora Core releases <fedora-list@xxxxxxxxxx> > >>>>To: fedora-list@xxxxxxxxxx > >>>>Subject: IP Address Config > >>>> > >>>>I am trying to change my IP Settings updating my ifcfg-eth0 settings. > >>>> > >>>>Basically, I want to set it up using a static IP, with subnet > >>>>255.255.255.248, gateway 70.88.x.x and ip address 70.88.x.x (x will be > >>>>replaced with real ip address). > >>>> > >>>>Here is my current ifcfg-eth0 file: > >>>> > >>>>+++++++++++++++++++++++++++ > >>>>DEVICE=eth0 > >>>>BOOTPRO=static > >>>>BROADCAST=70.88.225.255 > >>>>IPADDR=70.88.225.1 > >>>>NETMASK=255.255.255.248 > >>>>NETWORK=70.88.225.0 > >>>>ONBOOT=yes > >>>>TYPE=Ethernet > >>>>+++++++++++++++++++++++++++ > >>>> > >>>>Questions: > >>>>Where do I put in my Gateway address? > >>> > >>>GATEWAY goes in /etc/sysconfig/network generally. > >>> > >>> > >>>>What are the BROADCAST and NETWORK addresses? > >>> > >>>You don't provide enough information with the x.x piece to determine the > >>>subnet with that netmask, so theres no way for me to guarantee that this > >>>info is right. > >>> > >>>However, if I assume you mean subnet 70.88.225.0 with 255.255.255.248 > >>>netmask. Then BROADCAST would be 70.88.225.15 and NETWORK would be > >>>70.88.225.0. > >>> > >>>In general a 248 netmask like that (also referred to as /28 network) > >>>splits a traditional 'class C' (/24) into chunks of 16, starting with .0 > >>>in the class C as the first IP address, with the bottom address in each > >>>chunk being the network, and the top address in each chunk being the > >>>broadcast. If that makes sense ? > >>> > >>>So the subnets you get when splitting a /24 into multiple /28 (for this > >>>number range) would be : > >>> > >>>70.88.225.0-15 (1-14 useable IP addresses) > >>>70.88.225.16-31 (17-30 useable IP addresses) > >>>70.88.225.32-47 (33-46 useable IP addresses) > >>>70.88.225.48-63 (49-62 useable IP addresses) > >>>70.88.225.64-79 (65-78 useable IP addresses) > >>>70.88.225.80-95 (81-94 useable IP addresses) > >>>etc... up to 255.. the math is boring me and hurting my head at this point ;) > >>>I may have got it slightly wrong.. I hate enumerating small subnets. > >>> > >>>Hope this helps. > >>> > >>>Cheers, > >>> > >>>Al > >>> > >>>-- > >>>fedora-list mailing list > >>>fedora-list@xxxxxxxxxx > >>>To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list > >> > > >
