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? 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
