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Tip: Mismatching SEA and SEA Failover could cause broadcast storms to occur and affect the stability of your network. When upgrading from an SEA to an SEA Failover environment, it is imperative that the Virtual I/O Server with regular SEA be modified to SEA Failover prior to creating the second SEA with SEA Failover enablement. 5. Verify the SEA adapter attributes on both Virtual I/O Servers’ SEA adapter, as shown in Example 4-5. Example 4-5 Verify and change attributes for SEA adapter $ lsdev -dev ent4 -attr attribute value description user_settable ctl_chan ent3 Control Channel adapter for SEA failover True ha_mode auto High Availability Mode True netaddr Address to ping True pvid 1 PVID to use for the SEA device True pvid_adapter ent2 Default virtual adapter to use for non-VLAN-tagged packets True real_adapter ent0 Physical adapter associated with the SEA True thread 0 Thread mode enabled (1) or disabled (0) True virt_adapters ent2 List of virtual adapters associated with the SEA (comma separated) True 6. Create the Shared Ethernet Adapter IP address on VIO_Server2 using the mktcpip command, as shown in Example 4-6. Example 4-6 Create an IP address on the Shared Ethernet Adapter $ mktcpip -hostname VIO_Server2 -interface en4 -inetaddr 9.3.5.136 -netmask 255.255.255.0 -gateway 9.3.5.41 -nsrvaddr 9.3.4.2 -nsrvdomain itsc.austin.ibm.com Testing the SEA Failover You should test the SEA Failover to validate your setup and configuration. Test setup To test if the SEA Failover really works as expected, you should open a remote shell session from any system on the external network, such as your workstation, through the SEA adapter to any VIO client partition. From the shell session, try running any command that continuously produces output. Now you are ready to begin the tests. 216 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5
Test cases This section describes the test cases that you should go through to confirm that your setup of SEA Failover works as expected. Attention: If your Virtual I/O Servers also provide virtual SCSI disks in addition to SEA, then stale partitions will occur on the VIO clients when a Virtual I/O Server shuts down or fails. Thus, after each test, you must make sure that you re-synchronize all stale partitions before proceeding with the next test-case. 1. Manual failover: a. Set ha_mode to standby on primary: the SEA is expected to fail over; chdev -dev ent2 -attr ha_mode=standby b. Reset ha_mode to auto on primary: The SEA is expected to fail back: chdev -dev ent2 -attr ha_mode=auto 2. Virtual I/O Server shutdown: a. Reboot Virtual I/O Server on primary: The SEA is expected to fail over. b. When primary Virtual I/O Server comes up again: The SEA is expected to fail back. 3. Virtual I/O Server error: a. Deactivate from HMC on primary: The SEA is expected to fail over. b. Activate and boot Virtual I/O Server: The SEA is expected to fail back. 4. Physical link failure: a. Unplug the link of the physical adapter on the primary: The SEA is expected to fail over. b. Re-plug the link of the physical adapter on the primary: The SEA is expected to fail back. 5. Reverse the boot sequence: a. Shut down both Virtual I/O Server. b. Boot the standby Virtual I/O Server: The SEA is expected to become active on standby. c. Boot the primary Virtual I/O Server: The SEA is expected to fail back. Chapter 4. Setting up virtual I/O: advanced 217
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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
Page 192 and 193: Note: Based on the lsdev -vpd comma
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Page 196 and 197: Assuming that a NIM master is confi
Page 198 and 199: 3. Set up the NIM master IP address
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Page 208 and 209: 4.1 Providing higher serviceability
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Page 212 and 213: Some advanced topics with respect t
Page 214 and 215: While EC is an Cisco-specific imple
Page 216 and 217: Alternatives for network high avail
Page 218 and 219: Figure 4-6 IP multipathing in the c
Page 220 and 221: SEA Failover works as follows: Two
Page 222 and 223: Although the alternative configurat
Page 224 and 225: ► With NIB, the two internal netw
Page 226 and 227: In Figure 4-11 on page 201, a clien
Page 228 and 229: When Virtual I/O Server 2 returns t
Page 230 and 231: few cycles to set up, but none for
Page 232 and 233: 4.1.7 Considerations The following
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Page 236 and 237: 7. Check the devices list on your V
Page 238 and 239: Figure 4-17 shows the intended solu
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Page 244 and 245: Checking which SEA is active Checki
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Page 248 and 249: 2. Configure the SEA, as described
Page 250 and 251: 5. Check for the vhost adapter usin
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Page 254 and 255: Check the mappings, as shown in Exa
Page 256 and 257: 2. Check the MPIO configuration by
Page 258 and 259: To determine which path will use th
Page 260 and 261: 7. On the first LPAR, create an enh
Page 262 and 263: A switch can be forced with the /us
Page 264 and 265: The configurations described in thi
Page 266 and 267: We recommend using mirroring, strip
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Page 270 and 271: Supported scenarios using one Virtu
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Page 276 and 277: In order to help clients improve th
Page 278 and 279: Clients can find the fixes and file
Page 280 and 281: Figure 4-35 shows the basic conside
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Page 284 and 285: 5.1 Dynamic LPAR operations This se
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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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After the disk is replaced and brou
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2. Get a larger disk from the Virtu
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The updateios command does not comm
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Note: You can use dsh based on rsh,
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2 Checking if Redundancy with dual
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STATUS=`lspath -l $n | grep Failed
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Traditional performance measurement
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CPU statistics in shared-processors
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This is shown in Example 5-22 and E
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5.5.4 The topas command The topas c
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capped, and uncapped. The Mem and t
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Tip: The output of topas -cecdisp w
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These files can now be processed wi
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interval and count parameters. The
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The lparstat command POWER<
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Note: The variable capacity weight
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Column Measured parameter Comments
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The sysstat command The sysstat com
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write: wps avgserv minserv maxserv
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5.5.7 Monitoring with PLM The Parti
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Use the perfwb command to start the
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Using the r and p switches after st
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The nmon process runs in the backgr
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The POWER Hypervis
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5.7 Security considerations for Vir
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The firewall can be switched on and
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Enable mail client (dismaildmndls):
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Network option extendednetstats (ex
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Enable unsecure daemons (disrmtdmns
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Minimum number of chars (mindiffhls
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370 Advanced <stro
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6.1 Partition Load Manager introduc
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Notes: ► The PLM server may resid
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When PLM is notified that a partiti
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6.1.4 Memory management PLM manages
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However, the managed nodes know not
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sh and rcp During its installation,
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2. Create a toc file with the inuto
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. Append the PLM server public key
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You can set up the RMC using a scri
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Define a PLM policy as follows: 1.
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Table 6-2 CPU-related tunables CPU
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Memory tunables Table 6-4 shows the
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1. Start the Web-based System Manag
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4. Complete the information in the
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. Fill out the values for the tunab
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8. Specify the CPU resource policy
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Clicking the OK button will create
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. From the Web-based System Manager
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2. Click the Groups tab, and then t
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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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Back cover Advanced</strong
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