Tom, I had similar problems going from RH6.2 to 7.2. I also have the same configuration you are using (ESCON CTC, Linux LPAR, and z/OS 1.2 on the other end). In RH6.2 I would define escon0=, but had no success with that in 7.2. Here is what I did get to work (with a lot of help from Mark and the list) on my parmline:
chandev=ctc0,0x2020,0x2021,0,3 CHANDEV=ctc0,0x2020,0x2021,0,3 Yes, you pass the chandev parm in both upper and lower case. Once up you can ifconfig ctc0 and should be able to connect. One note: although an ESCON channel should handle an MTU of 65527 (what I used in 6.2), I seem to find the limit on the ctc0 is 32760. Best regards and good luck. Paul
