Abbreviated migration scenarios

Abbreviated migration scenarios

This section gives some abbreviated scenarios for when you are thinking of installing clusters on IBM MQ

Abbreviated scenarios: Effects of CONNAME and LOCLADDR settings

The following table provides an overview of what will occur for the different TCP/IP stacks (IPv4 only, IPv6 only and dual IPv4 and IPv6 stacks) and given the settings for CONNAME and LOCLADDR the expected connection result.
Note: Using mapped addresses can require protocol translators in the IP network.
Table 1. Effects of CONNAME and LOCLADDR settings

Stack Type CONNAME setting LOCLADDR setting Connection result

IPv4 only stack IPv4 address Channel binds to IPv4 stack

IPv6 address Channel fails to resolve CONNAME

Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv4 stack

IPv4 address IPv4 address Channel binds to IPv4 stack

IPv6 address IPv4 address Channel fails to resolve CONNAME

Host name resolves to both IPv4 and IPv6 addresses IPv4 address Channel binds to IPv4 stack

Any address IPv6 address Channel fails to resolve LOCLADDR

IPv4 address Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv4 stack

IPv6 address Host name resolves to both IPv4 and IPv6 addresses Channel fails to resolve CONNAME

Host name resolves to both IPv4 and IPv6 addresses Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv4 stack

Dual IPv4 and IPv6 stack IPv4 address Channel binds to IPv4 stack

IPv6 address Channel binds to IPv6 stack

Host name resolves to both IPv4 and IPv6 addresses Channel binds to stack determined by IPADDRV

IPv4 address IPv4 address Channel binds to IPv4 stack

IPv6 address IPv4 address Channel fails to resolve CONNAME

Host name resolves to both IPv4 and IPv6 addresses IPv4 address Channel binds to IPv4 stack

IPv4 address IPv6 address Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME

IPv6 address IPv6 address Channel binds to IPv6 stack

Host name resolves to both IPv4 and IPv6 addresses IPv6 address Channel binds to IPv6 stack

IPv4 address Host name resolves to both IPv4 and IPv6 addresses Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME

IPv6 address Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv6 stack

Host name resolves to both IPv4 and IPv6 addresses Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv6 stack

IPv6 only stack IPv4 address Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME

IPv6 address Channel binds to IPv6 stack

Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv6 stack

Any address IPv4 address Channel fails to resolve LOCLADDR

IPv4 address IPv6 address Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME

IPv6 address IPv6 address Channel binds to IPv6 stack

Host name resolves to both IPv4 and IPv6 addresses IPv6 address Channel binds to IPv6 stack

IPv4 address Host name resolves to both IPv4 and IPv6 addresses Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME

IPv6 address Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv6 stack

Host name resolves to both IPv4 and IPv6 addresses Host name resolves to both IPv4 and IPv6 addresses Channel binds to IPv6 stack

Abbreviated scenarios: System configurations
Table 3 gives a number of abbreviated scenarios based on the configuration of the installed queue managers and the IP configuration they are running on. The list is not intended to be exhaustive, but to give a number of examples of what to expect based on the configurations shown. The abbreviations are combined in Table 3 to give the configuration of the systems involved in trying to establish communication. For example:

v71 + IPv6: Represents a queue manager from an earlier version of the product on a system with a TCP/IP Version 6 stack
v8 + Dual: Represents a queue manager from the latest version of the product on system with a dual TCP/IP version 4 and Version 6 stack

Table 2. Abbreviations used in system configurations

Abbreviation Meaning

v71 queue manager from an earlier version of the product

v8 queue manager from the latest version of the product

IPv4 a system using an IPv4 only stack

IPv6 a system using an IPv6 only stack

Dual a system using both an IPv4 and an IPv6 stack

IPv4DNS DNS returns an IPv4 address only for host name of system holding the responding queue manager

IPv6DNS DNS returns an IPv6 address only for host name of system holding the responding queue manager

DualDNS DNS returns an IPv4 and IPv6 address for host name of system holding the responding queue manager

LOCLADDR4 The LOCLADDR parameter is set to IPv4 addressing

LOCLADDR6 The LOCLADDR parameter is set to IPv6 addressing

IPADDR4 IPADDRV is set to IPv4 addressing

IPADDR6 IPADDRV is set to IPv6 addressing

Table 3. System configurations

Originating queue manager Responding queue manager Result

Queue manager and Stack LOCLADDR IPADDRV Queue Manager and Stack DNS Return

v71 + IPv6
Any
Not applicable
IP Error

v71 + IPv4 or
v71 + Dual
Both
LOCLADDR4
&
LOCLADDR6
Not applicable
v71 + IPv4 or
v71 + Dual
IPv4DNS or
DualDNS
IPv4 connection can be
established

v71 + IPv4 or
v71 + Dual
Blank or
LOCLADDR4
Not applicable
v71 + IPv4 or
v71 + Dual
IPv4DNS or
DualDNS
IPv4 connection can be
established

v71 + IPv4 or
v71 + Dual
Blank or
LOCLADDR4
Not applicable
v71 + Dual
IPv6DNS
Unable to resolve
CONNAME

v71 + IPv4 or
v71 + Dual
Blank or
LOCLADDR4
Not applicable
v71 + Dual or
v8 + Dual
v8 + IPv4
IPv4DNS or
DualDNS
IPv4 connection can be
established

v71 + IPv4 or
v71 + Dual
LOCLADDR6
Not applicable
IP Error

v71 + IPv4 or
v71 + Dual
Blank or
LOCLADDR4
or both
LOCLADDR4
&
LOCLADDR6
Not applicable
v8 + IPv6
IPv6DNS
Unable to resolve
CONNAME

v8 + IPv4
Blank or
LOCLADDR4
Not specified
v71 + IPv4 or
v71 + Dual or
v8 + IPv4
IPv4DNS or
DualDNS
IPv4 connection can be
established

v8 + IPv4
LOCADD6
Not specified
Unable to resolve
LOCLADDR

v8 + IPv4
Blank or
LOCLADDR4
Not specified
v8 + IPv6
IPv6DNS
Unable to resolve
CONNAME

v8 + IPv6
Blank or
LOCLADDR6
Not specified
v71 + Dual
DualDNS
Attempts to start IPv6
channel and fails as there
will be no IPv6 listener
available

v8 + IPv6
Blank or
LOCLADDR6
Not specified
v71 + IPv4
IPv4DNS
Attempts to start IPv6
channel and fails as there
will be no IPv6 listener
available

v8 + IPv6 or
v8 + Dual
LOCLADDR6
Blank or
IPADDR6
v8 + IPv6 or
v8 + Dual
IPv6DNS or
DualDNS
IPv6 connection can be
established

v8 + Dual
LOCLADDR6
IPADDR4
v8 + Dual
IPv4DNS or
DualDNS
IPv6 connection can be
established where
mapped addressing can
be used

v8 + Dual
Blank or
LOCLADDR4
IPADDR4
v71 + Dual
IPv4DNS or
DualDNS
IPv4 connection can be
established

v8 + Dual
Both
LOCLADDR4
&
LOCLADDR6
Blank or
IPADDR4
v71 + Dual
IPv4DNS or
DualDNS
IPv4 connection can be
established

v8 + Dual
LOCLADDR4
IPADDR4
Unable to resolve
LOCLADDR

v8 + Dual
LOCLADDR6
or both
LOCLADDR4
&
LOCLADDR6
Blank or
IPADDR6
v8 + IPv6 or
v8 + Dual
IPv6DNS or
DualDNS
IPv6 connection can be
established

Parent topic: Internet Protocol Version 6 (IPv6) migration

Stack Type	CONNAME setting	LOCLADDR setting	Connection result
IPv4 only stack	IPv4 address		Channel binds to IPv4 stack
	IPv6 address		Channel fails to resolve CONNAME
	Host name resolves to both IPv4 and IPv6 addresses		Channel binds to IPv4 stack
	IPv4 address	IPv4 address	Channel binds to IPv4 stack
	IPv6 address	IPv4 address	Channel fails to resolve CONNAME
	Host name resolves to both IPv4 and IPv6 addresses	IPv4 address	Channel binds to IPv4 stack
	Any address	IPv6 address	Channel fails to resolve LOCLADDR
	IPv4 address	Host name resolves to both IPv4 and IPv6 addresses	Channel binds to IPv4 stack
	IPv6 address	Host name resolves to both IPv4 and IPv6 addresses	Channel fails to resolve CONNAME
	Host name resolves to both IPv4 and IPv6 addresses	Host name resolves to both IPv4 and IPv6 addresses	Channel binds to IPv4 stack

Dual IPv4 and IPv6 stack	IPv4 address		Channel binds to IPv4 stack
	IPv6 address		Channel binds to IPv6 stack
	Host name resolves to both IPv4 and IPv6 addresses		Channel binds to stack determined by IPADDRV
	IPv4 address	IPv4 address	Channel binds to IPv4 stack
	IPv6 address	IPv4 address	Channel fails to resolve CONNAME
	Host name resolves to both IPv4 and IPv6 addresses	IPv4 address	Channel binds to IPv4 stack
	IPv4 address	IPv6 address	Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME
	IPv6 address	IPv6 address	Channel binds to IPv6 stack
	Host name resolves to both IPv4 and IPv6 addresses	IPv6 address	Channel binds to IPv6 stack
	IPv4 address	Host name resolves to both IPv4 and IPv6 addresses	Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME
	IPv6 address	Host name resolves to both IPv4 and IPv6 addresses	Channel binds to IPv6 stack
	Host name resolves to both IPv4 and IPv6 addresses	Host name resolves to both IPv4 and IPv6 addresses	Channel binds to IPv6 stack

IPv6 only stack	IPv4 address		Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME
	IPv6 address		Channel binds to IPv6 stack
	Host name resolves to both IPv4 and IPv6 addresses		Channel binds to IPv6 stack
	Any address	IPv4 address	Channel fails to resolve LOCLADDR
	IPv4 address	IPv6 address	Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME
	IPv6 address	IPv6 address	Channel binds to IPv6 stack
	Host name resolves to both IPv4 and IPv6 addresses	IPv6 address	Channel binds to IPv6 stack
	IPv4 address	Host name resolves to both IPv4 and IPv6 addresses	Maps an IPv4 CONNAME to an IPv4 mapped IPv6 address. IPv6 implementations that do not support IPv4 mapped IPv6 addressing fail to resolve CONNAME
	IPv6 address	Host name resolves to both IPv4 and IPv6 addresses	Channel binds to IPv6 stack
	Host name resolves to both IPv4 and IPv6 addresses	Host name resolves to both IPv4 and IPv6 addresses	Channel binds to IPv6 stack

Abbreviation	Meaning
v71	queue manager from an earlier version of the product
v8	queue manager from the latest version of the product

IPv4	a system using an IPv4 only stack
IPv6	a system using an IPv6 only stack
Dual	a system using both an IPv4 and an IPv6 stack

IPv4DNS	DNS returns an IPv4 address only for host name of system holding the responding queue manager
IPv6DNS	DNS returns an IPv6 address only for host name of system holding the responding queue manager
DualDNS	DNS returns an IPv4 and IPv6 address for host name of system holding the responding queue manager

LOCLADDR4	The LOCLADDR parameter is set to IPv4 addressing
LOCLADDR6	The LOCLADDR parameter is set to IPv6 addressing

IPADDR4	IPADDRV is set to IPv4 addressing
IPADDR6	IPADDRV is set to IPv6 addressing

Originating queue manager		Responding queue manager			Result
Queue manager and Stack	LOCLADDR	IPADDRV	Queue Manager and Stack	DNS Return
v71 + IPv6	Any	Not applicable			IP Error
v71 + IPv4 or v71 + Dual	Both LOCLADDR4 & LOCLADDR6	Not applicable	v71 + IPv4 or v71 + Dual	IPv4DNS or DualDNS	IPv4 connection can be established
v71 + IPv4 or v71 + Dual	Blank or LOCLADDR4	Not applicable	v71 + IPv4 or v71 + Dual	IPv4DNS or DualDNS	IPv4 connection can be established
v71 + IPv4 or v71 + Dual	Blank or LOCLADDR4	Not applicable	v71 + Dual	IPv6DNS	Unable to resolve CONNAME
v71 + IPv4 or v71 + Dual	Blank or LOCLADDR4	Not applicable	v71 + Dual or v8 + Dual v8 + IPv4	IPv4DNS or DualDNS	IPv4 connection can be established
v71 + IPv4 or v71 + Dual	LOCLADDR6	Not applicable			IP Error
v71 + IPv4 or v71 + Dual	Blank or LOCLADDR4 or both LOCLADDR4 & LOCLADDR6	Not applicable	v8 + IPv6	IPv6DNS	Unable to resolve CONNAME

v8 + IPv4	Blank or LOCLADDR4	Not specified	v71 + IPv4 or v71 + Dual or v8 + IPv4	IPv4DNS or DualDNS	IPv4 connection can be established
v8 + IPv4	LOCADD6	Not specified			Unable to resolve LOCLADDR
v8 + IPv4	Blank or LOCLADDR4	Not specified	v8 + IPv6	IPv6DNS	Unable to resolve CONNAME
v8 + IPv6	Blank or LOCLADDR6	Not specified	v71 + Dual	DualDNS	Attempts to start IPv6 channel and fails as there will be no IPv6 listener available
v8 + IPv6	Blank or LOCLADDR6	Not specified	v71 + IPv4	IPv4DNS	Attempts to start IPv6 channel and fails as there will be no IPv6 listener available
v8 + IPv6 or v8 + Dual	LOCLADDR6	Blank or IPADDR6	v8 + IPv6 or v8 + Dual	IPv6DNS or DualDNS	IPv6 connection can be established
v8 + Dual	LOCLADDR6	IPADDR4	v8 + Dual	IPv4DNS or DualDNS	IPv6 connection can be established where mapped addressing can be used
v8 + Dual	Blank or LOCLADDR4	IPADDR4	v71 + Dual	IPv4DNS or DualDNS	IPv4 connection can be established
v8 + Dual	Both LOCLADDR4 & LOCLADDR6	Blank or IPADDR4	v71 + Dual	IPv4DNS or DualDNS	IPv4 connection can be established
v8 + Dual	LOCLADDR4	IPADDR4			Unable to resolve LOCLADDR
v8 + Dual	LOCLADDR6 or both LOCLADDR4 & LOCLADDR6	Blank or IPADDR6	v8 + IPv6 or v8 + Dual	IPv6DNS or DualDNS	IPv6 connection can be established