InfoCenter Home >
6: Administer applications >
6.6: Tools and resources quick reference >
6.6.51: Administering network configurations

6.6.51: Administering network configurations

This article discusses topics related to network configurations in a WebSphere environment. Network configurations can affect your WebSphere configuration.

Multiple networks

WebSphere Application Server tolerates the presence of more than one network on a single platform as long as the environment used to run WebSphere Application Server is configured such that the following conditions are met:

  • The primary hostname refers to the default - primary - network interface.
  • The Domain Name Server's response to a query of the platform's hostname returns the address of the primary network interface.
  • The IP for the platform resolves to the hostname and vice versa for both formats of hostname: fully qualified and not fully qualified.

Here is a good example of a multi-network interface card Windows NT platform that conforms to the above specifications. The hostnames, IP addresses, and adapter IDs have been genericized to my.server.net, patterns such as aaa.bbb.ccc.ddd, and variables of the form adapter_ID_n, respectively:

d:\work>ipconfig
Windows NT IP Configuration
Ethernet adapter adapter_ID_1:
IP Address. . . . . . . . . : aaa.bbb.ccc.ddd (Primary IP)
Subnet Mask . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . : 208.180.235.1
Ethernet adapter adapter_ID_2:
IP Address. . . . . . . . . : eee.fff.ggg.hhh
Subnet Mask . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . : 129.17.32.1

d:\work>nslookup aaa.bbb.ccc.ddd
Server: my.server.net
Address: mmm.nnn.ooo.ppp
Name: cdm-235-122-pflu.cox-internet.com (Resolves to hostname)
Address: aaa.bbb.ccc.ddd

d:\work>hostname
cdm-235-122-pflu (hostname is set correctly)

d:\work>nslookup cdm-235-122-pflu (and resolves to the same)
Server: my.server.net
Address: mmm.nnn.ooo.ppp
Name: cdm-235-122-pflu.cox-internet.com
Address: aaa.bbb.ccc.ddd (IP when NOT fully qualified)

d:\work>nslookup cdm-235-122-pflu.cox-internet.com (also resolves to the same)
Server: my.server.net
Address: mmm.nnn.ooo.ppp
Name: cdm-235-122-pflu.cox-internet.com
Address: aaa.bbb.ccc.ddd (IP when fully qualified)
Go to previous article: Administering coexisting product versions and editions Go to next article: Running the product servers and consoles as non-root

 

 
Go to previous article: Administering coexisting product versions and editions Go to next article: Running the product servers and consoles as non-root