Advanced POWER Virtualization on IBM System p5 - Previous ...

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The firewall can be switched on and off. If enabled with the -on switch, connections to the ports ftp-data (20), ftp (21), ssh (22), www (80), https (443), rmc (657), and cimon (32768) will be allowed, all other traffic will be denied. Example 5-50 shows this procedure. Example 5-50 Activating the firewall with the viosecure command $ viosecure -firewall on $ viosecure -firewall view Firewall ON ALLOWED PORTS Local Remote Interface Port Port Service IPAddress Expiration Time(seconds) --------- ---- ---- ------- --------- --------------- $ Further configuration can allow access to specific ports generally or just for specified remote machine(s). We show as an example here how to restrict the rsh command connections (Port 112) to a single machine with an IP address of 9.3.5.111. This could well be an administrative machine from which connections to the HMC can be allowed, as the HMC is also able to restrict connections to specified machines (Example 5-51). Example 5-51 Allowing rsh connections from a specified IP address $ viosecure -firewall allow -port exec -address 9.3.5.111 $ viosecure -firewall view Firewall ON ALLOWED PORTS Local Remote Interface Port Port Service IPAddress Expiration Time(seconds) --------- ---- ---- ------- --------- --------------- all 512 any exec 9.3.5.111 0 $ The login will now succeed from the IP address 9.3.5.111, while other machines will not be able to connect. To deny connections to a specified port as well as to remove the opened port from the firewall list, use the following command (Example 5-52 on page 361). 360 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
Example 5-52 Denying rsh connections from a specified IP address $ viosecure -firewall deny -port exec -address 9.3.5.111 $ viosecure -firewall view Firewall ON ALLOWED PORTS Local Remote Interface Port Port Service IPAddress Expiration Time(seconds) --------- ---- ---- ------- --------- --------------- $ All firewall settings will be recorded to the file viosfirewall.rules in the home directory of the padmin user upon firewall shutdown with the viosecure -firewall off command. However, the padmin user is not allowed to see the contents. Upon startup of the firewall, the settings of the file viosfirewall.rules will be applied to the firewall again so that no modifications are lost. System parameter security Some system parameters require careful consideration if higher security levels are required. These can be user parameters as well as network parameters. The viosecure command as of Virtual I/O Server Version 1.3 supports changes to 37 parameters. The output of the viosecure -nonint -view command shows the parameters that can be set: $viosecure -nonint -view Enable telnet (telnetdls):Uncomments the entry for telnetd daemon in /etc/inetd.conf and starts telnetd daemon. Disable UDP chargen service in /etc/inetd.conf (udpchargendls):comments the entry for UDP Chargen service in /etc/inetd.conf and kills all instances of chargen. Disable sprayd in /etc/inetd.conf (sprayddls):comments the entry for sprayd daemon in /etc/inetd.conf and kills all instances of sprayd. Minimum number of chars (mindiffdls):Removes the constraint on the minimum number of characters required in a new password that were not in the old password. Set core file size (coredls):Remove the core attribute for root. Password expiration warning time (pwdwarntimedls):Removes the constraint on the number of days before the system issues a warning that a password change is required. Disable dtspc in /etc/inetd.conf (dtspcdls):comments the entry for dtspc daemon in /etc/inetd.conf when LFT is not configured and CDE is disabled in /etc/inittab, also kills all the instances of dtspc daemon. Chapter 5. System management 361
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Front cover Advanced</stron
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Note: Before using this information
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2.1 New features in Version 1.3 of
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4.4.2 Configuration on the Virtual
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6.6.4 Managing memory resources . .
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3-9 Processing sharing mode and the
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5-14 Status window . . . . . . . .
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xiv Advanced <stro
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xvi Advanced <stro
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any form without payment to IBM, fo
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The team that wrote this redbook Th
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xxii Advanced <str
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- Additional information about the
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management” on page 257 discusses
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1.1.5 Virtual LAN 1.1.6 Virtual I/O
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The service processor provides the
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Adapter sparing Adapter sparing can
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1.4.1 IBM AIX 5L for System p5 syst
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Note: i5/OS partitions are only sup
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Function / capability IBM System z9
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1.6 The value of the Advanc
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18 Advanced <stron
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2.1 New features in Version 1.3 of
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► throughput and performance. For
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► IVM enhancements Industry leadi
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Shared Ethernet Adapter failover ca
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the partition. This allows you to c
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Figure 2-2 ASMI menu to enable the
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management interface for systems wi
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When setting up a partition, you ha
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partition with 0.50 processing unit
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processors and the other a single o
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Figure 2-5 shows the usage of the s
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2.4.5 Dynamic partitioning Partitio
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Number of virtual processors In gen
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The benefit of SMT is greatest wher
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Setting SMT mode using SMIT Use the
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The Hypervisor firmware and the hos
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Partition 2 is configured with one
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Note: The Virtual I/O Server suppor
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Most ISVs consider partitions with
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When a partition is running as unca
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► ► ► Selected IBM software p
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Shared pool = 4 CPU Sum EC = 3.0 PU
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For more information about the use
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Table 2-5 Licensing estimation for
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Maximum virtual processors used Cap
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2.8 Virtual and Shared Ethernet int
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► VLAN 2 - Node A-2 - Node B-3 -
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VLAN support in AIX 5L is based on
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2. Tagged port receives a packet ta
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page 78. EtherChannel and Link Aggr
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Note: In this type of configuration
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Figure 2-18 Shared Ethernet Adapter
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Other aspects that have to be taken
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► Only packets for the VLAN speci
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► Packets tagged with a VLAN othe
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► The value proposition enabling
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Figure 2-21 Virtual SCSI architectu
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Figure 2-23 and Figure 2-24 show th
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4. In the Virtual I/O Server, vios1
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The following are the steps to unco
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► ► A logical volume on the Vir
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I/O configuration, performance is a
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Hardware management is done by an H
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VMC allows IVM to provide basic log
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Virtual TTY In order to allow LPAR
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2.13.1 Linux device drivers for IBM
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Mirroring Linux can mirror disks by
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Figure 2-29 Bridging a virtual and
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116 Advanced <stro
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3.1 Getting started This section pr
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lspath mkpath mkvdev mkvt rmdev rmp
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3.1.2 Hardware resources managed Th
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3.2 Creating a Virtual I/O Server p
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3. Enter the partition name and ID
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5. You have the option to change th
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7. Select the Shared check box for
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9. Specify the processing sharing m
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11.Skip setting the I/O pools, as s
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2. Click the Create adapter button
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5. Add a virtual SCSI adapter to vi
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7. Select Normal for your boot mode
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A few seconds after the status wind
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3. Select the VIO_Server1 profile a
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You are now ready to use the newly
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3. Specify the Maximum virtual adap
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You can use the lsmap -all -net com
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2. Select the check box AIX or Linu
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2. Click Create client adapter. The
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4. Click Create server adapter and
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6. When the operation is complete,
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9. When you have completed adding v
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Server SCSI adapters have been adde
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Using logical partitions In our bas
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Note: Based on the lsdev -vpd comma
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It is useful to be able to map the
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Assuming that a NIM master is confi
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3. Set up the NIM master IP address
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3.4.6 Mirroring the Virtual I/O Ser
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Once the interaction between virtua
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Figure 3-45 shows the steps to crea
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Ethernet server adapter and a physi
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4.1 Providing higher serviceability
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Figure 4-1 MPIO and LV Mirroring wi
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Some advanced topics with respect t
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While EC is an Cisco-specific imple
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Alternatives for network high avail
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Figure 4-6 IP multipathing in the c
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SEA Failover works as follows: Two
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Although the alternative configurat
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► With NIB, the two internal netw
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In Figure 4-11 on page 201, a clien
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When Virtual I/O Server 2 returns t
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few cycles to set up, but none for
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4.1.7 Considerations The following
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. On step 10, allocate an unused Et
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7. Check the devices list on your V
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Figure 4-17 shows the intended solu
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. Click the Create Adapter button,
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Tip: Mismatching SEA and SEA Failov
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Checking which SEA is active Checki
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In this scenario, we attach each Vi
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2. Configure the SEA, as described
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5. Check for the vhost adapter usin
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8. Check again, using the lsdev com
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Check the mappings, as shown in Exa
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2. Check the MPIO configuration by
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To determine which path will use th
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7. On the first LPAR, create an enh
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A switch can be forced with the /us
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The configurations described in thi
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We recommend using mirroring, strip
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Supported multi-path configurations
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Supported scenarios using one Virtu
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Supported scenarios using multiple
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4.7.2 Supported Ethernet configurat
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In order to help clients improve th
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Clients can find the fixes and file
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Figure 4-35 shows the basic conside
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256 Advanced <stro
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5.1 Dynamic LPAR operations This se
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5. Figure 5-3 shows you the Virtual
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another partition. Use the lsslot -
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2. Select the adapter to be moved a
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5.1.3 Add memory dynamically in AIX
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5.1.4 Removing memory dynamically T
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The following command shows the eff
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2. Figure 5-17 shows the current pr
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et1 Defined 01-09 IEEE 802.3 Ethern
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1. Use the diagmenu command to unco
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5. Locate the blinking adapter, rep
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► Figure 5-19 shows you the topol
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Example 5-4 shows how to back up th
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Example 5-6 Creating a Virtual I/O
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5.2.5 Restoring the Virtual I/O Ser
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For an AIX 5L NIM server recovery,
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To view the System Plan, Select Sys
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In Example 5-11, we look to the map
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The last information we need is the
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In a mirrored environment, issue th
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Figure 5-23 shows that the virtual
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csm.diagnostics 1.5.0.0 # Cluster S
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os.txt.spell 5.3.0.10 # Writer's To
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hd3 jfs2 1 2 2 open/syncd /tmp hd1
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Adding a PCI hot plug adapter The t
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The following is a list of empty SC
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Page 354 and 355: 5.5.4 The topas command The topas c
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Page 366 and 367: Note: The variable capacity weight
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Page 370 and 371: The sysstat command The sysstat com
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Page 374 and 375: 5.5.7 Monitoring with PLM The Parti
Page 376 and 377: Use the perfwb command to start the
Page 378 and 379: Using the r and p switches after st
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Page 384 and 385: 5.7 Security considerations for Vir
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Page 390 and 391: Network option extendednetstats (ex
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Page 398 and 399: 6.1 Partition Load Manager introduc
Page 400 and 401: Notes: ► The PLM server may resid
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Page 416 and 417: Define a PLM policy as follows: 1.
Page 418 and 419: Table 6-2 CPU-related tunables CPU
Page 420 and 421: Memory tunables Table 6-4 shows the
Page 422 and 423: 1. Start the Web-based System Manag
Page 424 and 425: 4. Complete the information in the
Page 426 and 427: . Fill out the values for the tunab
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Page 430 and 431: Clicking the OK button will create
Page 432 and 433: . From the Web-based System Manager
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Figure 6-21 Edit Policy File partit
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The policy_file and log_file parame
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In its short form, the xlplm -Q com
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6.3 Point-in-time and recurring rec
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Select the type of operation you wi
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6.4 Tips and troubleshooting PLM Th
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Note: Exchanging keys is an importa
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The Identity entry is either based
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120200c10d3ad7a20951523b7c01bd31f42
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► ► PLM does not directly state
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6.6 Resource management Owners of I
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Characteristics of WLM, PLM, and sh
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Evaluating CPU utilization Traditio
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Shared-processor partitions support
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438 Advanced <stro
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FDX FLOP FRU FTP GDPS GID GPFS GUI
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442 Advanced <stro
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Other publications These publicatio
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► ► ► ► Virtual I/O Server
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cfgdev command 163, 203, 264 cfgmgr
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excess weight, PLM 376 extendlv com
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Micro-Partitioning 3, 32-33 49 capp
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processor dispatch 43, 50 processor
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VIO 59 virtual processor 61 mainten
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target 90, 92 virtual SCSI Server a
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