29.1 Configuring LAN Adapters
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The first step toward the configuration of a LAN adapter is to list the available adapters. Some of the adapters may not have their device drivers installed with the standard HP-UX installation. These adapters are not visible until you install related device drivers for them. The lsdev command can be used to list configured drivers for the LAN adapters as follows .
# lsdev -C lan Character Block Driver Class 52 -1 lan2 lan 140 -1 fcgsc_lan lan 169 -1 btlan3 lan 170 -1 btlan4 lan 172 -1 fddi3 lan 173 -1 btlan1 lan 236 -1 maclan lan # The command shows the major number for the driver and the driver name . Each adapter has some parameters associated with it, such as data transfer speed and maximum transfer unit (MTU). You can modify some of these parameters using HP-UX commands.
LAN Adapter-Naming Convention
Names for LAN adapters follow a convention where the name of each adapter consists of two parts . The first part is the name and the second part is a number showing the physical point of attachment (PPA). The combination of these two is called the NamePPA. Usually this combination starts with lan or snap followed by a PPA number. Any operation on an adapter is performed through this name. Names starting with lan are used for Ethernet encapsulation, while those starting with snap are used for IEEE 802.3 encapsulation. Common device names are lan0 , lan1 , and so on.
Detecting LAN Adapters
You have already used the ioscan command to list disk and tape drives . All LAN adapters fall into the lan class of devices. The following command lists all installed devices of class lan .
# ioscan -funC lan Class I H/W Path Driver S/W State H/W Type Description =================================================================== lan 0 10/4/8 btlan1 CLAIMED INTERFACE HP HP-PB 100 Base TX card lan 1 10/4/16 btlan1 CLAIMED INTERFACE HP HP-PB 100 Base TX card lan 2 10/12/6 lan2 CLAIMED INTERFACE Built-in LAN /dev/diag/lan2 /dev/ether2 # The command shows that there are three LAN adapters installed in the system. You can see the instance number, hardware path, and driver name for each of these adapters. A CLAIMED in the S/W State column shows that the software driver is successfully bound with the adapter. The INTERFACE in the H/W Type column shows this type of hardware is an interface adapter. The last column shows a small description of the interface card. The last line shows device file names for lan2 .
In addition to the ioscan command, a more-specific command named lanscan can be used to list LAN adapters. This command shows additional information about each adapter. Output of this command is shown here.
# lanscan Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI Path Address In# State NamePPA ID Type Support Mjr# 10/4/16 0x080009D41DBB 1 UP lan1 snap1 1 ETHER Yes 119 10/4/8 0x080009D481F6 0 UP lan0 snap0 2 ETHER Yes 119 10/12/6 0x080009F02610 2 UP lan2 snap2 3 ETHER Yes 119 # In the output of the lanscan command, columns that show additional information are as follows.
| Station Address | This column shows a 48-bit Ethernet address. This is represented in hexadecimal notation. Each LAN adapter has a unique Ethernet address. This address is also called MAC address or physical address. |
| NamePPA | A single adapter can support more than one protocol. The combination of name and PPA is shown under this column. A name starting with lan is used for Ethernet encapsulation, while a name starting with snap is used for IEEE 802.3 encapsulation. |
| NM ID | Network Management ID. This is used with the lanadmin command for diagnosis and for changing network parameters. |
| MAC Type | Shows what type of MAC layer is used with this adapter. |
| HP-DLPI Support | Shows whether the device will work with an HP Data Link Provider Interface. |
Use of the -v option with the command shows the extended station address and supported encapsulation methods as shown next . The Extended Station Address is used for interfaces that need more than 48 bits of physical address. The LLC Encapsulation Methods lists supported encapsulation methods on this interface adapter.
# lanscan -v --------------------------------------------------------------------------- Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI Path Address In# State NamePPA ID Type Support Mjr# 10/4/16 0x080009D41DBB 1 UP lan1 snap1 1 ETHER Yes 119 Extended Station LLC Encapsulation Address Methods 0x080009D41DBB IEEE HPEXTIEEE SNAP ETHER NOVELL Driver Specific Information btlan1 --------------------------------------------------------------------------- Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI Path Address In# State NamePPA ID Type Support Mjr# 10/4/8 0x080009D481F6 0 UP lan0 snap0 2 ETHER Yes 119 Extended Station LLC Encapsulation Address Methods 0x080009D481F6 IEEE HPEXTIEEE SNAP ETHER NOVELL Driver Specific Information btlan1 --------------------------------------------------------------------------- Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI Path Address In# State NamePPA ID Type Support Mjr# 10/12/6 0x080009F02610 2 UP lan2 snap2 3 ETHER Yes 119 Extended Station LLC Encapsulation Address Methods 0x080009F02610 IEEE HPEXTIEEE SNAP ETHER NOVELL Driver Specific Information lan2 --------------------------------------------------------------------------- #  |
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