The following has be reported by IBM LTC: Use of ctc for installation of RHEL-3 U2 (64-bit) fails Hardware Environment: Manufacturer: IBM Type: 2066 Model: 0LF VM00 Control Program: z/VM 4.4.0 Software Environment: RedHat Enterprise Linux 3 update 2, example kernel: 2.4.21-12.EL #1 SMP Fri Mar 26 20:57:10 EST 2004 s390x unknown Steps to Reproduce: 1. Boot up ramdisk system from VM reader 2. Specify CTC connection info to let the guest talk to TCPIP stack (stack has proxy-arp enabled). 3. Attemp network connection later (ie. ping or telnet) Actual Results: System does not respond. And after giving bootstrap systema access to ping (which is not available on the ramdisk), found that the VM TCPIP stack side of the CTC was not responding. Expected Results: That we would have connection established all the way. And we would be able to telnet in and proceed with the installation. Additional Information: We found that the mtu set automatically by redhat (1500) did not match the defaults used by the VM TCPIP stack side (32760). However setting the mtu to match manually did not re-establish connection. Also if we bring up an already installed RedHat (via qdio device) system and run the commands to set up ctc, we are able to use the ctc to communicate just fine.Okay, we found out that even our installed system, really couldn't talk to the VM TCPIP stack. We had another interface up on the same lan segment and that's where the communication was going through. Once that was brought down, our system was similarly incommunicado.
vechandr.com
Bill at IBM, is this still an issue with the U3 beta ?
Glen, Can you please provide some more specifics on this problem. Here's a coment from Pete indicating questions he has: "Maybe the protocol wasn't right. We use 0, but I saw people with 2 at customer sites. The advantage of zero is that it's automatically set by both sides. I cannot figure what's wrong based on the problem description.
I just did an install of rhel3 ga using mtu of 1492 and protocol 0 and had no problems. This should be closed.
changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |corryk.com ------- Additional Comments From corryk.com(prefers email via kevcorry.com) 2005-03-02 17:00 EST ------- Hi Veerendra, Please check if this bug is fixed in the latest RHEL3 update. If so, go ahead and close this bug. Thanks!
changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ACCEPTED |CLOSED Impact|------ |Installability ------- Additional Comments From vechandr.com 2005-03-04 00:58 EST ------- Tested it on the kernel version 2.4.21-27.EL and it is working fine.