Have you logged in on the console and looked at ifconfig? What does it
say? Can you ping out of the linux image to other systems?
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Robert P. Nix | Sr IT Systems Engineer |  Data Center Infrastructure
Services
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On 10/30/14, 9:26 AM, "Chase, John" <[email protected]> wrote:

>No.
>
>  -jc-
>
>> -----Original Message-----
>> From: Linux on 390 Port [mailto:[email protected]] On Behalf Of
>>Ambros, Thomas
>> Sent: Thursday, October 30, 2014 9:11 AM
>> To: [email protected]
>> Subject: Re: Linux guests on DR machine not reachable
>> 
>> Are you running mproute?
>> 
>> Thomas Ambros
>> zEnterprise Operating Systems
>> zEnterprise Systems Management
>> 518-436-6433
>> 
>> -----Original Message-----
>> From: Linux on 390 Port [mailto:[email protected]] On Behalf Of
>>Chase, John
>> Sent: Thursday, October 30, 2014 10:01
>> To: [email protected]
>> Subject: Linux guests on DR machine not reachable
>> 
>> Cross-posted to IBMVM and LINUX390 lists
>> 
>> Greetings.
>> 
>> We're bringing up z/VM and Linux guests for the first time at a D/R
>>exercise.  Since we have our own
>> CBU "warm site", we create an isolated network to be used for the D/R
>>exercise.  The primary internal
>> network is prefixed 10.1 and the isolated D/R network is prefixed 10.2.
>> 
>> After z/VM (6.2, non-SSI) IPLs, we logon TCPMAINT and edit PROFILE
>>TCPIP to change the HOME and
>> DEFAULTNET IP addresses from 10.1.xxx.yyy to 10.2.xxx.yyy, then shut
>>down and restart TCPIP.  z/VM is
>> now reachable from non-mainframe devices plugged into the isolated
>>network (e.g., Ping from a laptop
>> works fine; 3270 emulator sessions establish via non-ICC ports).
>> 
>> Next we login to a Linux (RHEL 6.3 and 6.5) guest (3270 console), where
>>we had pre-configured a
>> "clone" of the ifcfg-eth0 file to specify 10.2 (instead of 10.1) in all
>>the appropriate places.  We
>> rename ("mv") the "prod" and "D/R" copies so that ifcfg-eth0 now
>>specifies 10.2 instead of 10.1 in all
>> the right places.  We stop and restart network services, but Linux is
>>not ping-able from outside.  OK
>> let's reboot Linux.  No change; still can't ping Linux from outside the
>>mainframe but within the
>> isolated network.  OK, we'll just bounce the whole virtual machine
>>(SIGNAL SHUTDOWN followed by
>> XAUTOLOG from OPERATOR).  That didn't work, either.  We didn't notice
>>any network-related error
>> message as Linux came up again.
>> 
>> Not much to go on, but can anybody think of what we might have missed
>>in reconfiguring Linux to "play"
>> in the isolated (10.2) network?
>> 
>> TIA,
>> 
>>     -jc-
>> 
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