en0        Available 1L-08         Standard Ethernet Network Interface

en1        Available 14-08         Standard Ethernet Network Interface

en2        Defined   1D-08         Standard Ethernet Network Interface

ent0       Available 1L-08         10/100 Mbps Ethernet PCI Adapter II (1410ff01)

ent1       Available 14-08         10/100 Mbps Ethernet PCI Adapter II (1410ff01)

ent2       Available 1D-08         10/100 Mbps Ethernet PCI Adapter II (1410ff01)

et0        Defined   1L-08         IEEE 802.3 Ethernet Network Interface

et1        Defined   14-08         IEEE 802.3 Ethernet Network Interface

et2        Defined   1D-08         IEEE 802.3 Ethernet Network Interface

由此能够看出：

ent1之类的是物理网卡的设备名，en0或是et0是网络接口名(逻辑上的)。enx(x是一个数字，代表第几块网卡)是标准以太网接口。et0是IEEE 802.3以太网接口。

en0是Ethernet II protocal interface

et0是802.3 protocal interface 

ent0是Hardware device interface

2、查看网卡属性：

[root@aix211 /]#lsattr -El en0

alias4                      IPv4 Alias including Subnet Mask           True

alias6                      IPv6 Alias including Prefix Length         True

arp           on            Address Resolution Protocol (ARP)          True

authority                   Authorized Users                           True

broadcast                   Broadcast Address                          True

mtu           1500          Maximum IP Packet Size for This Device     True

netaddr       192.168.8.211 Internet Address                           True

netaddr6                    IPv6 Internet Address                      True

netmask       255.255.255.0 Subnet Mask                                True

prefixlen                   Prefix Length for IPv6 Internet Address    True

remmtu        576           Maximum IP Packet Size for REMOTE Networks True

rfc1323                     Enable/Disable TCP RFC 1323 Window Scaling True

security      none          Security Level                             True

state         up            Current Interface Status                   True

tcp_mssdflt                 Set TCP Maximum Segment Size               True

tcp_nodelay                 Enable/Disable TCP_NODELAY Option          True

tcp_recvspace               Set Socket Buffer Space for Receiving      True

tcp_sendspace               Set Socket Buffer Space for Sending        True

[root@aix211 /]#lsattr -El et0

alias4             IPv4 Alias including Subnet Mask           True

alias6             IPv6 Alias including Prefix Length         True

arp           on   Address Resolution Protocol (ARP)          True

authority          Authorized Users                           True

broadcast          Broadcast Address                          True

mtu           1492 Maximum IP Packet Size for This Device     True

netaddr            Internet Address                           True

netaddr6           IPv6 Internet Address                      True

netmask            Subnet Mask                                True

prefixlen          Prefix Length for IPv6 Internet Address    True

remmtu        576  Maximum IP Packet Size for REMOTE Networks True

rfc1323            Enable/Disable TCP RFC 1323 Window Scaling True

security      none Security Level                             True

state         down Current Interface Status                   True

tcp_mssdflt        Set TCP Maximum Segment Size               True

tcp_nodelay        Enable/Disable TCP_NODELAY Option          True

tcp_recvspace      Set Socket Buffer Space for Receiving      True

tcp_sendspace      Set Socket Buffer Space for Sending        True

[root@aix211 /]#lsattr -El ent0

alt_addr        0x000000000000   Alternate Ethernet Address                    True

busintr         85               Bus interrupt level                           False

busmem          0xc8030000       Bus memory address                            False

chksum_offload  yes              Enable hardware transmit and receive checksum True

intr_priority   3                Interrupt priority                            False

ipsec_offload   no               IPsec Offload                                 True

large_send      yes              Enable TCP Large Send Offload                 True

media_speed     Auto_Negotiation Media Speed                                   True

poll_link       no               Enable Link Polling                           True

poll_link_timer 500              Time interval for Link Polling                True

rom_mem         0xc8000000       ROM memory address                            False

rx_hog          1000             RX Descriptors per RX Interrupt               True

rxbuf_pool_sz   1024             Receive Buffer Pool Size                      True

rxdesc_que_sz   512              RX Descriptor Queue Size                      True

slih_hog        10               Interrupt Events per Interrupt                True

tx_preload      1520             TX Preload Value                              True

tx_que_sz       8192             Software TX Queue Size                        True

txdesc_que_sz   512              TX Descriptor Queue Size                      True

use_alt_addr    no               Enable Alternate Ethernet Address             True

[root@aix211 /]#

3、查看网卡配置:

[root@aix211 /]#lscfg -vpl en0

[root@aix211 /]#lscfg -vpl et0

[root@aix211 /]#lscfg -vpl ent0

  ent0             U0.1-P1/E2  10/100 Mbps Ethernet PCI Adapter II (1410ff01)

    10/100 Mbps Ethernet PCI Adapter II:

        Network Address.............000255CF1406

        ROM Level.(alterable).......SCU015

        Product Specific.(Z0).......A5204205

        Hardware Location Code......U0.1-P1/E2

  PLATFORM SPECIFIC

  Name:  ethernet

    Node:  ethernet@1

    Device Type:  network

    Physical Location: U0.1-P1/E2

Physical Location的位置能够推断网卡是否是插在PCI接口上的

[root@aix211 /]#lsslot -c pci

# Slot      Description                         Device(s)

U0.1-P2-I1  PCI-X capable, 64 bit, 133MHz slot  Empty   

U0.1-P2-I2  PCI-X capable, 64 bit, 133MHz slot  Empty   

U0.1-P2-I3  PCI-X capable, 64 bit, 133MHz slot  fcs0 

U0.1-P2-I4  PCI-X capable, 64 bit, 133MHz slot  Empty   

U0.1-P2-I5  PCI-X capable, 64 bit, 133MHz slot  ent2 

U0.1-P2-I6  PCI-X capable, 64 bit, 133MHz slot  Empty



[root@aix211 /]#lscfg -vpl ent2

  ent2             U0.1-P2-I5/E1  10/100 Mbps Ethernet PCI Adapter II (1410ff01)

      10/100 Mbps Ethernet PCI Adapter II:

        Part Number.................09P5023

        FRU Number..................09P5023

        EC Level....................H10971A

        Manufacture ID..............YL1021

        Network Address.............000255AF8DAD

        ROM Level.(alterable).......SCU004

        Product Specific.(Z0).......A5204205

        Hardware Location Code......U0.1-P2-I5/E1

--- 能够看出。ent2是插在pci插槽上

2、逻辑设备是用户或应用程序訪问物理设备的界面。用户或应用程序通过逻辑设备来訪问物理设备。



3、在非常多情况下，一个物理设备会相应多个逻辑设备