IBM Systems Session V29 Virtual Switch User Guide Manual
Summary
This comprehensive guide details the advanced process of migrating to z/VM Virtual Switch (VSwitch). It covers complex network architecture concepts, including routing versus bridging and VLAN-aware migration strategies. The manual provides expert instruction for system administrators and network engineers responsible for designing robust, high-availability mainframe networking environments, ensuring seamless connectivity between virtual machines and physical LAN resources.
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How to Migrate to the z/VM Virtual Switch
Session V29
Alan Altmark, IBM z/VM Development, Endicott, NY
2006 IBM Corporation IBM Systems
Page Summary Contents For IBM Systems Session V29 Virtual Switch User Guide Manual
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How to Migrate to the z/VM Virtual Switch Session V29 Alan Altmark, IBM z/VM Development, Endicott, NY 2006 IBM Corporation IBM Systems
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IBM Systems References to IBM products, programs, or services do not imply that IBM intends to make these available in all countries in which IBM operates. Any reference to an IBM product, program, or...
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IBM Systems Topics Routing vs. Bridging What’s a switch? VLAN-unaware migration VLAN-aware migration 2006 IBM Corporation
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IBM Systems Review: Guest LAN vs. Virtual Switch Guest Guest Guest Guest Guest Guest LAN Virtual Switch Ethernet LAN Virtual router is required No virtual router Different subnet Same subnet External ...
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IBM Systems A routed Guest LAN web web web Subnet B Virtual router to connect Guest LAN to Ethernet Router Often VM TCP/IP Subnet A Switch 2006 IBM Corporation
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IBM Systems A bridged Guest LAN using VSWITCH web web web Subnet B No virtual router required Built-in transparent bridge Subnet B Switch 2006 IBM Corporation
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IBM Systems What’s a switch? Cisco Corp A box that creates a LAN It can be remotely configured E.g. Turn ports on and off Contains a built-in router 2006 IBM Corporation
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IBM Systems Switch functions Enable and disable a port Set port type: trunk or access Assign port to one or more VLANs Set port speed: 10 / 100 / 1000 / Auto Set port duplex mode: Simplex / Duplex / A...
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IBM Systems A routed Guest LAN web web web 10.0.1.254 Default gateway for Guest LAN hosts Router Default gateway for VSWITCH hosts Switch 2006 IBM Corporation
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IBM Systems z/VM Virtual Switch – VLAN unaware Linux VM TCP/IP VSE z/OS Virtual QDIO adapter Virtual Switch Guest LAN LAN Bridge OSA-Express Same LAN segment and Ethernet LAN subnet 2006 IBM Corporati...
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IBM Systems 2006 IBM Corporation
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IBM Systems Current Cisco 6509 Switch Configuration OSA is plugged into port 7 of slot 2 Port is defined as an access port VLAN unaware host Port is currently assigned to VLAN 201 While in ENABLE mode...
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IBM Systems CP – SYSTEM CONFIG DEFINE LAN WEBNET TYPE QDIO RESTRICTED MODIFY LAN WEBNET GRANT LINUX001 MODIFY LAN WEBNET GRANT LINUX002 MODIFY LAN WEBNET GRANT LINUX003 MODIFY LAN WEBNET GRANT LINUX00...
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IBM Systems VM TCP/IP directory USER TCPIP XXXXXXXX 32M 128M ABG * Guest LAN NICDEF E00 TYPE QDIO LAN SYSTEM WEBNET * OSA DEDICATE C200 C200 DEDICATE C201 C201 DEDICATE C202 C202 2006 IBM Corporation
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IBM Systems VM TCP/IP Profile ; Syntax is z/VM 5.2 ; eth0 is the external OSA DEVICE ETH0 OSD C200 LINK ETH0 QDIOETHERNET ETH0 MTU 1500 ; eth1 is Guest LAN DEVICE ETH1 OSD E00 LINK ETH1 QDIOETHERNET E...
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IBM Systems Linux directory entry USER LINUX002 XXXXXXXX 128M 2048M G * Guest LAN NICDEF C204 TYPE QDIO LAN SYSTEM WEBNET 2006 IBM Corporation
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IBM Systems Linux configuration - network ifconfig eth0 10.0.1.5 mask 255.255.255.0 mtu route add default gw 10.0.1.254 2006 IBM Corporation
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IBM Systems 2006 IBM Corporation
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IBM Systems Methodology #1 Create a new VLAN in the Cisco switch to carry the subnet being moved Associate the OSA with the new VLAN Add a new router to the switch Delete the router from z/VM Connect ...
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IBM Systems Cisco Catalyst 6509 (running Cat OS) While in ENABLE mode: #set vlan 202 name webnet mtu #set vlan 202 2/7 While in CONFIG mode: #interface vlan #ip address 10.0.1.254 255.255.255.0 If you...
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IBM Systems CP – SYSTEM CONFIG * from Guest LAN… DEFINE LAN WEBNET RESTRICTED TYPE QDIO MODIFY LAN WEBNET GRANT LINUX001 MODIFY LAN WEBNET GRANT LINUX002 MODIFY LAN WEBNET GRANT LINUX003 MODIFY LAN WE...
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IBM Systems 2006 IBM Corporation
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IBM Systems A routed Guest LAN web web web 10.0.1.254 Default gateway for Guest LAN hosts TCPIP Router Default gateway for VSWITCH hosts Switch 2006 IBM Corporation
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IBM Systems A VLAN-aware switch: An inside look 2006 IBM Corporation
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IBM Systems Trunk Port vs. Access Port Access port carries traffic for a single VLAN Host not aware of VLANs Trunk port carries traffic from all VLANs Every frame is tagged with the VLAN id 2006 IBM C...
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IBM Systems Physical Switch to Virtual Switch Each guest can be in a different VLAN Trunk port carries traffic between CP and switch CP Virtual Switch 2006 IBM Corporation
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IBM Systems z/VM Virtual Switch – VLAN aware Linux VM TCP/IP VSE z/OS Virtual QDIO adapter Virtual Switch Guest LAN OSA-Express IEEE 802.1q transparent Ethernet LAN bridge Trunk port 2006 IBM Corporat...
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IBM Systems 2006 IBM Corporation
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IBM Systems Methodology #2 Use a single OSA port to carry traffic for both VM TCP/IP and the Linux guests Use a VLAN-aware VSWITCH Add a new router to the switch Allow VLAN tags for both subnets to fl...
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IBM Systems CP – SYSTEM CONFIG * from a Guest LAN… DEFINE LAN WEBNET RESTRICTED TYPE QDIO MODIFY LAN WEBNET GRANT LINUX001 MODIFY LAN WEBNET GRANT LINUX002 MODIFY LAN WEBNET GRANT LINUX003 MODIFY LAN ...
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IBM Systems Cisco Catalyst 6509 (running Cat OS) While in ENABLE mode: #set vlan 202 name webnet mtu #set trunk 2/7 on dot1q 1,201-202 While in CONFIG mode: #interface vlan #ip address 10.0.1.254 255....
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IBM Systems VM TCP/IP directory USER TCPIP XXXXXXXX 32M 128M ABG * Virtual Switch NICDEF C200 TYPE QDIO LAN SYSTEM WEBNET 2006 IBM Corporation
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IBM Systems VM TCP/IP Profile ; Syntax is z/VM 5.2 ; eth0 is the external OSA DEVICE ETH0 OSD C200 LINK ETH0 QDIOETHERNET ETH0 MTU 1500 HOME 20.17.19.85/24 ETH0 GATEWAY defaultnet 20.17.19.254 ETH0 0 ...
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IBM Systems 2006 IBM Corporation
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IBM Systems Summary Conversion is relatively easy Draw pictures There are choices: Separate OSA ports, each assigned to a separate VLAN A single OSA port that trunks multiple VLANs A combination 2006 ...
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IBM Systems Thanks for Listening! 2006 IBM Corporation
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IBM Systems Contact Information By e-mail: [email protected] In person: USA 607.429.3323 On the Web: http://ibm.com/vm/devpages/altmarka Mailing lists: [email protected] [email protected]...
Manual Details
| Brand | IBM |
|---|---|
| Pages | 37 |
| File Size | 370.49 KB |
| Published | May 23, 2026 |
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Frequently Asked Questions
What is required to connect a Guest LAN?
The setup depends on the method: A virtual router may be needed, or it could utilize existing external/internal routers.
How can an OSA port handle multiple VLANs?
It can use a single OSA port that trunks multiple VLANs, which is suitable for using a VLAN-aware VSWITCH.
What main functions does the switch support?
Functions include enabling/disabling ports, setting port type (trunk or access), assigning VLANs, and defining internal routers.
Is migrating between network configurations complex?
No, conversion is noted as being 'relatively easy' if you plan the changes.