3Com SuperStack 3 Switch 4300 Getting Started Manual

Also see for SuperStack 3 4300: User guide Datasheet

Logging in as a Default User 31Obtaining a Registered IP AddressInterNIC Registration Services is the organization responsible forsupplying registered IP addresses. The following contact information iscorrect at time of publication:World Wide Web site: http://www.internic.netSubnets and Using aSubnet MaskYou can divide your IP network into sub-networks also known as subnets.Support for subnets is important because the number of bits assigned tothe device part of an IP address limits the number of devices that may beaddressed on any given network. For example, a Class C address isrestricted to 254 devices.If you have a small network (less than 254 devices), you may decide notto have multiple subnets.A subnet mask is used to divide the device part of the IP address into twofurther parts: The first part identifies the subnet number. The second part identifies the device on that subnet.The bits of the subnet mask are set to 1 if the device is to treat thecorresponding bit in the IP address as part of the original networknumber or as part of the subnet number. These bits in the mask are set to0 if the device is to treat the bit as part of the device number.If you are unsure about what mask to use, 3Com suggests that youcontact your network administrator.Logging in as aDefault UserIf you manage a Switch using the web interface or the command lineinterface, you need to log in with a valid user name and password. TheSwitch has two default user names, and each user name has a differentpassword and level of access. These default user names are listed inTable 9.17100ua.bk Page 31 Monday, March 12, 2001 11:18 AM