AIX 5L Problem Determination - IBM Redbooks

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As you can see, the output shows the number of input and output errors and the number of input and output packets. Note: The collision count for Ethernet interfaces is not displayed by the netstat command. It always shows 0. To see more detailed statistics, use the entstat command: # entstat -d en0 ------------------------------------------------------------- ETHERNET STATISTICS (en0) : Device Type: IBM PCI Ethernet Adapter (22100020) Hardware Address: 08:00:5a:fc:d2:e1 Elapsed Time: 1 days 1 hours 21 minutes 29 seconds Transmit Statistics: Receive Statistics: -------------------- ------------------- Packets: 579687 Packets: 55872 Bytes: 49852606 Bytes: 4779893 Interrupts: 0 Interrupts: 55028 Transmit Errors: 0 Receive Errors: 0 Packets Dropped: 0 Packets Dropped: 0 Bad Packets: 0 Max Packets on S/W Transmit Queue: 2 S/W Transmit Queue Overflow: 0 Current S/W+H/W Transmit Queue Length: 0 Broadcast Packets: 2327 Broadcast Packets: 0 Multicast Packets: 0 Multicast Packets: 0 No Carrier Sense: 0 CRC Errors: 0 DMA Underrun: 0 DMA Overrun: 0 Lost CTS Errors: 0 Alignment Errors: 0 Max Collision Errors: 0 No Resource Errors: 0 Late Collision Errors: 0 Receive Collision Errors: 0 Deferred: 34 Packet Too Short Errors: 0 SQE Test: 0 Packet Too Long Errors: 0 Timeout Errors: 0 Packets Discarded by Adapter: 0 Single Collision Count: 4 Receiver Start Count: 0 Multiple Collision Count: 12 Current HW Transmit Queue Length: 0 General Statistics: ------------------- No mbuf Errors: 0 Adapter Reset Count: 4 Driver Flags: Up Broadcast Running Simplex AlternateAddress 64BitSupport 180 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
IBM PCI Ethernet Adapter Specific Statistics: ------------------------------------------------ Chip Version: 16 Packets with Transmit collisions: 1 collisions: 4 6 collisions: 2 11 collisions: 0 2 collisions: 1 7 collisions: 1 12 collisions: 0 3 collisions: 4 8 collisions: 1 13 collisions: 0 4 collisions: 1 9 collisions: 0 14 collisions: 0 5 collisions: 1 10 collisions: 1 15 collisions: 0 To test for dropped packets, use the ping command with the -f flag. The -f flag floods, or outputs, packets as fast as they come back or one hundred times per second, whichever is more. For every ECHO_REQUEST sent, a period is printed, while for every ECHO_REPLY received, a backspace is printed. This provides a rapid display of how many packets are being dropped. Only the root user can use this option. 8.2 Routing problems If you are not able to ping by host name or IP address, you may have a routing problem. First, check the routing tables as follows: 1. Use the netstat -rn command to show the content of your local routing table using IP addresses. # netstat -nr Routing tables Destination Gateway Flags Refs Use If PMTU Exp Groups Route Tree for Protocol Family 2 (Internet): default 9.3.240.1 UGc 0 0 tr0 - - 9.3.240/24 9.3.240.58 U 31 142091 tr0 - - 10.47.1.2 9.3.240.59 UGH 0 2 tr0 - - 127/8 127.0.0.1 UR 0 3 lo0 - - 127.0.0.1 127.0.0.1 UH 3 761 lo0 - - 195.116.119/24 195.116.119.2 U 2 406 en0 - - Route Tree for Protocol Family 24 (Internet v6): ::1 ::1 UH 0 0 lo0 16896 - 2. Check the netmask displayed and ensure that it is correct (ask the network administrator what it should be if you are unsure). # lsattr -El tr0 -a netmask -F value 255.255.255.0 Chapter 8. Network problem determination 181
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ibm.com/redbooks IBM Certification
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Note: Before using this information
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3.5.1 The /etc/inittab file . . . .
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7.2.1 Data relocation . . . . . . .
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9.9.1 The lslicense command . . . .
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x IBM ^ Certification Study Guide -
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10-12 Performance tuning flowchart
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8-7 Commonly used flags of the rout
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Trademarks The following terms are
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This publication does not replace p
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Comments welcome Your comments are
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1.1 Certification requirements To a
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e. Verify that file systems are mou
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Preparation for this exam is the to
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2.1 Defining the problem The first
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If the problem occurs on more than
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2.4.1 Answers The following are the
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3.1 A general overview of the boot
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mainly to components on the motherb
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Figure 3-3 Task selection menu in d
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3.2.2 PCI systems next step is to s
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3.3 Boot phase 1 Newer PCI architec
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3.4 Boot phase 2 In boot phase 2, t
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As mentioned, there are a lot of di
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3.4.3 LED 518 product documentation
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Figure 3-9 Boot phase 3 /etc/initta
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3.5.2 LED 553 3.5.3 LED c31 3.5.4 L
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3.5.5 pSeries servers A specific LE
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When the system is gracefully shut
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LED Reason/action c31 Define the co
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3. A file system is being mounted b
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3.9.1 Answers 3.10 Exercises The fo
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4.1 Hardware basics RS/6000 and pSe
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The most important fields in the pr
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Figure 4-1 Main diagnostics menu Th
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► Full testing requires that the
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3. Place the CD-ROM into the drive.
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Note: This service aid is only pres
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2. Select Change Show use of an SSA
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LED 299 A LED code of 299 shows tha
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Figure 4-2 Format of the 103 code m
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4.5 Quiz The following assessment q
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4.5.1 Answers 4.6 Exercises The fol
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5.1 Configuring the dump device Pri
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5.2 Starting a system dump A user-i
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A command status screen will be dis
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If the system does not have a key s
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The shconf command is invoked when
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5.4 Increasing the size of the dump
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Setting output device to /dev/rmt0.
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Look at the time of the dump and th
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Failure Causes SOFTWARE PROGRAM Rec
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Using crash, you can examine: ► A
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► ? or help[] Lists all subcomman
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LR: .waitproc+d4 (0000edc4) 2ff3b38
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DSIRR Data Storage Interrupt Reason
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*prevthread:0xe6000000 *nextthread:
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In this example, the VMM return cod
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The snap command syntax is as follo
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Flag Description -t Format Lists ea
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Flag Description -p Device Temporar
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Figure 5-3 Error log case study 2.
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Figure 5-4 Case study Which of the
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5.10.1 Answers 5.11 Exercises The f
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6.1 The error daemon The error logg
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To change the current log file, the
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To process a report from the error
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Flag Description -g Displays the AS
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Flag Description -F FlagList Select
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Probable Causes ERRDEMON STARTED AU
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To display a detailed report of all
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USER ID 0 0=SOFT IPL 1=HALT 2=TIME
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Resource Class: planar Resource Typ
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Flag Description -k ErrorID[,ErrorI
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6.5.1 Setting up an accounting syst
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6. A user has the ability to ping t
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Figure 10-1 General performance tun
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Display previously captured data Th
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10.1.2 The vmstat command The vmsta
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later). The method used in AIX Vers
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second. Large values indicate a CPU
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kernel routine records the process
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syncd 1 2 2 0 0 0 sh 1 1 1 0 0 0 sl
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The memory columns The memory colum
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The sr column The sr column shows t
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If you want to sort to the sixth co
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► Workload Management Class (-W)
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schedtune limitations The schedtune
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schedtune parameters are reset by t
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Normal files are automatically mapp
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tty: tin tout avg-cpu: % user % sys
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When looking for performance proble
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those that do not. If you are runni
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The netstat -m command The netstat
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spec buf 1 0 0 0 128 128 0 locking
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Late Collision Errors The Late Coll
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The retrans column displays the num
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Figure 10-3 Web-based System Manage
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Superclasses A superclass is a clas
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► Shared subclass: This subclass
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The sequence of attributes within a
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This manual assignment can be done
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This defines three levels of privil
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The class assignment is done by WLM
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Figure 10-8 shows the SMIT panel wh
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Figure 10-10 SMIT panel for rset re
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10.6.1 The dbx command The dbx comm
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Subcommand Description return Conti
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15) phxent_dd [5 entries] 16) kbddd
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10.8 Command summary The following
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10.8.4 The nfsstat command 10.9 Qui
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6. Which command will show system c
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11.1 Overview 11.1.1 Terminology 11
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Note: Before installing a new set o
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► APAR number, such as IY00301. I
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► To install all filesets associa
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Table 11-2 Commonly used flags of t
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11.5 Quiz Flag Description -f Check
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- A Web server The browser must be
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Figure 12-2 HTTP filesets If you ar
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- Remote computer Type the remote d
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Figure 12-4 Documentation Library S
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CISPR International Special Committ
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I/O Input/Output I 2 C Inter Integr
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OEM Original Equipment Manufacturer
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SPM System Performance Measurement
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Other resources These publications
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phase1 figure 23 phase2 15, 24, 36
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pc.statd 189 daemons shdaemon 73 te
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host name resolution telnet login p
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N name resolution diagnostic 185 pr
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ecent CPU usage 241 recovering an i
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System Resource Controller (SRC) 13
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IBM Certification Study Guide - AIX
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AIX 5L Problem Determination - IBM Redbooks

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