AIXStudy-AIX Nic Configuration Management (ent0, en0, et0)

AIXStudy-AIX Nic Configuration Management (ent0, en0, et0)
AIX Study-AIX Nic Configuration Management (ent0, en0, et0)
1. view the NIC information of the AIX system:
[Root @ aix211/] # lsdev | grep et

en0        Available 1L-08         Standard Ethernet Network Interfaceen1        Available 14-08         Standard Ethernet Network Interfaceen2        Defined   1D-08         Standard Ethernet Network Interfaceent0       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 Interfaceet1        Defined   14-08         IEEE 802.3 Ethernet Network Interfaceet2        Defined   1D-08         IEEE 802.3 Ethernet Network Interface

We can see that:

Ent1 is the device name of the physical Nic, en0 or et0 is the network interface Name (logical), and enx (x is a number, representing the first few NICS) is the standard Ethernet interface, et0 is an IEEE 802.3 Ethernet interface.

En0 is the Ethernet II protocal interface

Et0 is 802.3 protocal interface

Ent0 is Hardware device interfacE

2. View Nic attributes:

 

[root@aix211 /]#lsattr -El en0alias4                      IPv4 Alias including Subnet Mask           Truealias6                      IPv6 Alias including Prefix Length         Truearp           on            Address Resolution Protocol (ARP)          Trueauthority                   Authorized Users                           Truebroadcast                   Broadcast Address                          Truemtu           1500          Maximum IP Packet Size for This Device     Truenetaddr       192.168.8.211 Internet Address                           Truenetaddr6                    IPv6 Internet Address                      Truenetmask       255.255.255.0 Subnet Mask                                Trueprefixlen                   Prefix Length for IPv6 Internet Address    Trueremmtu        576           Maximum IP Packet Size for REMOTE Networks Truerfc1323                     Enable/Disable TCP RFC 1323 Window Scaling Truesecurity      none          Security Level                             Truestate         up            Current Interface Status                   Truetcp_mssdflt                 Set TCP Maximum Segment Size               Truetcp_nodelay                 Enable/Disable TCP_NODELAY Option          Truetcp_recvspace               Set Socket Buffer Space for Receiving      Truetcp_sendspace               Set Socket Buffer Space for Sending        True

[root@aix211 /]#lsattr -El et0alias4             IPv4 Alias including Subnet Mask           Truealias6             IPv6 Alias including Prefix Length         Truearp           on   Address Resolution Protocol (ARP)          Trueauthority          Authorized Users                           Truebroadcast          Broadcast Address                          Truemtu           1492 Maximum IP Packet Size for This Device     Truenetaddr            Internet Address                           Truenetaddr6           IPv6 Internet Address                      Truenetmask            Subnet Mask                                Trueprefixlen          Prefix Length for IPv6 Internet Address    Trueremmtu        576  Maximum IP Packet Size for REMOTE Networks Truerfc1323            Enable/Disable TCP RFC 1323 Window Scaling Truesecurity      none Security Level                             Truestate         down Current Interface Status                   Truetcp_mssdflt        Set TCP Maximum Segment Size               Truetcp_nodelay        Enable/Disable TCP_NODELAY Option          Truetcp_recvspace      Set Socket Buffer Space for Receiving      Truetcp_sendspace      Set Socket Buffer Space for Sending        True

[root@aix211 /]#lsattr -El ent0alt_addr        0x000000000000   Alternate Ethernet Address                    Truebusintr         85               Bus interrupt level                           Falsebusmem          0xc8030000       Bus memory address                            Falsechksum_offload  yes              Enable hardware transmit and receive checksum Trueintr_priority   3                Interrupt priority                            Falseipsec_offload   no               IPsec Offload                                 Truelarge_send      yes              Enable TCP Large Send Offload                 Truemedia_speed     Auto_Negotiation Media Speed                                   Truepoll_link       no               Enable Link Polling                           Truepoll_link_timer 500              Time interval for Link Polling                Truerom_mem         0xc8000000       ROM memory address                            Falserx_hog          1000             RX Descriptors per RX Interrupt               Truerxbuf_pool_sz   1024             Receive Buffer Pool Size                      Truerxdesc_que_sz   512              RX Descriptor Queue Size                      Trueslih_hog        10               Interrupt Events per Interrupt                Truetx_preload      1520             TX Preload Value                              Truetx_que_sz       8192             Software TX Queue Size                        Truetxdesc_que_sz   512              TX Descriptor Queue Size                      Trueuse_alt_addr    no               Enable Alternate Ethernet Address             True[root@aix211 /]#

3. View Nic Configuration:

 

 

[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

The Physical Location can be used to determine whether the NIC is inserted on the PCI interface.

 

[Root @ aix211/] # lsslot-c pci
# Slot Description Device (s)
U0.1-P2-I1 PCI-X capable, 64 bit, 133 MHz slot Empty
U0.1-P2-I2 PCI-X capable, 64 bit, 133 MHz slot Empty
U0.1-P2-I3 PCI-X capable, 64 bit, 133 MHz slot fcs0
U0.1-P2-I4 PCI-X capable, 64 bit, 133 MHz slot Empty
U0.1-P2-I5 PCI-X capable, 64 bit, 133 MHz slot ent2
U0.1-P2-I6 PCI-X capable, 64 bit, 133 MHz 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 ......
FRU Number ......
EC Level...
Manufacture ID...
Network Address...
ROM Level .. (alterable) ...... SCU004
Product Specific. (Z0) ...... A5204205
Hardware Location Code... U0.1-P2-I5/E1

--- We can see that ent2 is inserted in the pci slot.
Physical and logical devices

1. A physical device is the actual hardware that is connected to a computer system in some way. Such as display, terminal, and tape drive.

2. A logical device is the interface on which a user or application accesses a physical device. A user or application accesses a physical device through a logical device.

3. In many cases, a physical device corresponds to multiple logical devices.

View physical devices:[Root @ aix211/] # lsdev-Cc adapter
Ent0 Available 1 l-08 10/100 Mbps Ethernet PCI Adapter II (1410ff01)
Ent1 Available 14-08 10/100 Mbps Ethernet PCI Adapter II (1410ff01)
Ent2 Available 1 d-08 10/100 Mbps Ethernet PCI Adapter II (1410ff01)
Fcs0 Available 1n-08 FC Adapter
View logical devices: [Root @ aix211/] # lsdev-Cc if
En0 Available 1L-08 Standard Ethernet Network Interface
En1 Available 14-08 Standard Ethernet Network Interface
En2 Defined 1D-08 Standard Ethernet Network Interface
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