RSPELLMAN@bat.bates.edu (08/22/89)
Can anybody help me setup subnetting on a 3B2 running Wollongong's Enhanced TCP/IP WIN/3B software? I haven't found anywhere to specify the number of bits I want to use for a subnet. We have a class B ip number, and want to use eight extra bits for subnetting. Some of the hardware we are running is forcing us to subnet, so not subnetting is not a valid option. Thanks! Rob Spellman RSpellman@Bat.Bates.edu Computing Center Bates College Lewiston, Maine
gaggy@jolnet.ORPK.IL.US (Gregory Gulik) (08/23/89)
In article <20669@adm.BRL.MIL> RSPELLMAN@bat.bates.edu writes: > >Can anybody help me setup subnetting on a 3B2 running Wollongong's >Enhanced TCP/IP WIN/3B software? I haven't found anywhere to >specify the number of bits I want to use for a subnet. We have >a class B ip number, and want to use eight extra bits for subnetting. > >Some of the hardware we are running is forcing us to subnet, so not >subnetting is not a valid option. > >Thanks! > >Rob Spellman >RSpellman@Bat.Bates.edu >Computing Center >Bates College >Lewiston, Maine Sure, if you're running a fairly recent version, use the ifconfig command with the bitmask option. For example, to specify a 4 bit class A subnet address, do something like this: ifconfig en0 bitmask 0xFF8000 ...or something like that, I don't have my manual handy. Hope that gets you started. -greg -- Gregory Gulik Phone: (312) 825-2435 E-Mail: ...!jolnet!gaggy || ...!chinet!gag || gulik@depaul.edu || gulik@iwlcs.att.com || variations thereof.
jackv@turnkey.gryphon.COM (Jack F. Vogel) (08/23/89)
In article <20669@adm.BRL.MIL> RSPELLMAN@bat.bates.edu writes: > >Can anybody help me setup subnetting on a 3B2 running Wollongong's >Enhanced TCP/IP WIN/3B software? I haven't found anywhere to >specify the number of bits I want to use for a subnet. We have >a class B ip number, and want to use eight extra bits for subnetting. Unless there is something peculiar about Wollongong, and I doubt it, one sets up a subnet using the ifconfig command, it should be of the form: ifconfig interface IP-address netmask 0xffffff00 ^^^^^^^^^^^^^^^^^^ The netmask is what determines the class of the subnet, also remember that all the hosts you want on your subnet better be set up similarly. -- Jack F. Vogel jackv@seas.ucla.edu AIX Technical Support - or - Locus Computing Corp. jackv@ifs.umich.edu
jkg@gatech.edu (Jim Greenlee) (08/31/89)
In article <6354@turnkey.gryphonTCC.COM> jackv@turnkey.gryphon.COM writes: >Unless there is something peculiar about Wollongong, and I doubt it, one >sets up a subnet using the ifconfig command, it should be of the form: > > ifconfig interface IP-address netmask 0xffffff00 > ^^^^^^^^^^^^^^^^^^ > >The netmask is what determines the class of the subnet, also remember that >all the hosts you want on your subnet better be set up similarly. [ Cross-posted to comp.sys.att and u3b.tech - followups directed to those groups only, since this is probably getting too 3B2-specific ] The version of "ifconfig" that came with our WIN TCP/IP (version 1.0) does not offer "netmask" as a valid option. Do more recent versions support it? Is the lack of a netmask option a hardware or software limitation? Will an upgrade of the WIN TCP/IP help? I just recently became interested in this stuff, so I'm looking for answers rather than supplying them. Our department is moving to a new building in a couple of weeks (where we will have to use sub-nets), so I have suddenly developed a rather pressing need to solve this problem. Any help would be appreciated. Jim Greenlee -- Jim Greenlee - Instructor, School of ICS, Georgia Tech jkg@gatech.edu Jryy, abj lbh'ir tbar naq qbar vg! Whfg unq gb xrrc svqqyvat jvgu vg hagvy lbh oebxr vg, qvqa'g lbh?!