AIX下修改网卡的速率:

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方案一:通过命令行模式修改

(1)AIX系统版本：通过#oslevel

5.3.0.0

(2)具体操作过程和解释

a、查看网卡速率

#netstat -v ent0 | grep -p "Specific Statistics"
IBM 10/100 Mbps Ethernet PCI Adapter Specific Statistics:
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Chip Version: 25
RJ45 Port Link Status : up
Media Speed Selected: Auto negotiation
Media Speed Running: 100 Mbps Full Duplex           #<--------当前网卡速率
Receive Pool Buffer Size: 384
Free Receive Pool Buffers: 128
No Receive Pool Buffer Errors: 0
Inter Packet Gap: 96
Adapter Restarts due to IOCTL commands: 1
Packets with Transmit collisions:
 1 collisions: 0           6 collisions: 0          11 collisions: 0
 2 collisions: 0           7 collisions: 0          12 collisions: 0
 3 collisions: 0           8 collisions: 0          13 collisions: 0
 4 collisions: 0           9 collisions: 0          14 collisions: 0
 5 collisions: 0          10 collisions: 0          15 collisions: 0
Excessive deferral errors: 0x0


b、更改网卡速率（网卡必须处于down模式）

chdev -l 'ent0' -a media_speed='100M_Full_Duplex'

注：网卡工作方式有以下几种：

10_Half_Duplex

10_Full_Duplex

100_Half_Duplex

100_Full_Duplex

1000_Half_Duplex（千兆网卡才有此选项）

1000_Full_Duplex（千兆网卡才有此选项）

Auto_Negotiation 

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方案二：通过smitty交换方式

(1)通过smitty删除网卡

    a.# smitty inet
      Move cursor to desired item and press Enter.
       List All Network Interfaces
       Add a Network Interface
       Change / Show Characteristics of a Network Interface
       Remove a Network Interface
       PVCs for IP over an ATM Network
       Configure Aliases
   b.选择Remove a Network Interface
            Move cursor to desired item and press Enter.                         
            en0   11-08   Standard Ethernet Network        Interface                
            en1   40-58   Standard Ethernet Network        Interface                
            et0   11-08   IEEE 802.3 Ethernet Network      Interface                
            et1   40-58   IEEE 802.3 Ethernet Network      Interface

     c. 要删除的网卡

     d.  #cfgmgr

(2)通过smitty添加网卡

a. #smitty ethernet 

   Move cursor to desired item and press Enter.

   Adapter

   Services

   User Applications

 b.选择Adapter

   Move cursor to desired item and press Enter.

   List All Ethernet Adapters

   Change / Show Characteristics of an Ethernet Adapter

   Generate Error Report

   Trace an Ethernet Adapter

c.选择Change / Show Characteristics of an Ethernet Adapter

     Move cursor to desired item and press Enter.                            

ent0 Available 11-08 IBM 10/100 Mbps Ethernet PCI Adapter (23100020)   

 ent1 Available 40-58 IBM 10/100 Mbps Ethernet PCI Adapter (23100020)

d.选择要修改的网卡

   ent0 Available 11-08 IBM 10/100 Mbps Ethernet PCI Adapter (23100020)


Type or select values in entry fields.
   Press Enter AFTER making all desired changes.
                            [Entry Fields]
   Ethernet Adapter               ent0
   Description                  IBM 10/100 Mbps Ethernet PCI Adapter (23100020)
   Status                      Available
   Location                    11-08
   TRANSMIT queue size           [8192]                                                             
   HARDWARE RECEIVE queue size      [256]                                                          
   RECEIVE buffer pool size        [384]                                                              
   Media Speed                 10_Full_Duplex            #<-----选中 Media Speed   10_Full_Duplex  进行修改                                      
   Inter-Packet Gap              [96]                                                             
   Enable ALTERNATE ETHERNET address    no                                                               
   ALTERNATE ETHERNET address        [0x000000000000]                                                
   Enable Link Polling             no                                                                
   Time interval for Link Polling      [500]                                                              
   Apply change to DATABASE only       no