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. > 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 >
