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MQSeries.net Forum Index » General IBM MQ Support » Channel retrying

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solomon_13000
PostPosted: Tue Oct 07, 2008 10:46 pm    Post subject: Channel retrying Reply with quote

Master

Joined: 13 Jun 2008
Posts: 284

Apart from

1. CA cert expired
2. Channel definition wrong
3. Firewall not opened

can we say that network incompatibility causes the channel to retry?. For example there are two network. Network 1 uses IPv6 and Network 2 uses IPv4. Both this network have their respective queue manager. Network 1 uses a queue manager with the name QM1 and Network 2 uses a queue manager with the name QM2. From my understanding this problem can be solved by having both network to use the same IP version. But then if the owners of the respective network decides to remain with the same IP version, Network 1: IPv6 and Network 2: IPv4, is there a solution to this problem?.
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exerk
PostPosted: Tue Oct 07, 2008 11:07 pm    Post subject: Reply with quote

Jedi Council

Joined: 02 Nov 2006
Posts: 6339

solomon_13000 wrote:
...is there a solution to this problem?


I believe it's called a bridge...but I'm sure someone more network savvy will be along in a moment
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys.
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rgprasanna
PostPosted: Tue Oct 07, 2008 11:11 pm    Post subject: Reply with quote

Voyager

Joined: 02 May 2007
Posts: 91
Location: Chennai - India

yah..queue manager with IPV6 can able to connect to queue manager with IPV4..but the DNS of the respective machine should be configured to handle this
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Prasanna
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atheek
PostPosted: Wed Oct 08, 2008 2:19 am    Post subject: Reply with quote

Partisan

Joined: 01 Jun 2006
Posts: 327
Location: Sydney

Solomon_13000 wrote:
Can we say that network incompatibility causes the channel to retry?


Yes. From intercommunication manual:

Quote:

If the system has only an IPV4 stack configured, the IPV4 stack will always be used. If a local address (LOCLADDR) or connection name (CONNAME) is specified as an IPV6 network address, an error is generated and the channel will fail to start.

If the system has only an IPV6 stack configured, the IPV6 stack will always be used. If a local address (LOCLADDR) is specified as an IPV4 network address, an error is generated and the channel will fail to start.


Read Chapter 6 of intercom manual for CONNAME and LOCLADDR attributes where use of IPv6 and v4 is discussed
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solomon_13000
PostPosted: Wed Oct 08, 2008 4:12 am    Post subject: Reply with quote

Master

Joined: 13 Jun 2008
Posts: 284

Quote:
LOCLADDR and CONNAME


According to the manual LOCLADDR is used to resolve channel problem. When a channel is restarted the channel IP address wont change with the use of LOCLADDR. Does it mean that CONNAME will get overwrite?.
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atheek
PostPosted: Wed Oct 08, 2008 4:29 am    Post subject: Reply with quote

Partisan

Joined: 01 Jun 2006
Posts: 327
Location: Sydney

solomon_13000 wrote:
CONNAME can get overwrite should a channel restart


NO
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solomon_13000
PostPosted: Wed Oct 08, 2008 4:47 am    Post subject: Reply with quote

Master

Joined: 13 Jun 2008
Posts: 284

I did some reading and discovered the following:

CONNAME(localhost(1005))
LOCLADDR(localhost(1000,2000))

So by specifying using LOCLADDR I can get a channel to use a particular IP, port and port range for outbound communication. So in this case my CONNAME must use localhost as the IP and the port number must be within the range 1000 to 2000.


Last edited by solomon_13000 on Wed Oct 08, 2008 4:54 am; edited 1 time in total
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atheek
PostPosted: Wed Oct 08, 2008 4:54 am    Post subject: Reply with quote

Partisan

Joined: 01 Jun 2006
Posts: 327
Location: Sydney

A channel use a tcp/ip connection for communication.
A Coonection consist of source ip, source port , destination ip, destination port

LOCLADDR decides the source ip and Port, while CONNAME decides the destination ip and port.




In windows and unix you can use netstat command to see the different tcp/ip connections
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solomon_13000
PostPosted: Wed Oct 08, 2008 5:02 am    Post subject: Reply with quote

Master

Joined: 13 Jun 2008
Posts: 284

now I understand
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