I am using CTCs between my Linux LPAR and two z/OS V1.2 LPARs. For
debugging, I shutdown Zebra, OSPFD, and all other interfaces with the
exception of 1 CTC. The CTC is as follows:
Linux 161.186.86.6/30 --- z/OS V1.2 161.186.86.5/30
ctc0 Link encap:Serial Line IP
inet addr:161.186.86.6 P-t-P:161.186.86.5 Mask:255.255.255.252
UP POINTOPOINT RUNNING NOARP MTU:32760 Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:11836 (11.5 Kb) TX bytes:8374 (8.1 Kb)
Like I said, I can ping 161.186.86.5 from 161.186.86.6 with no problems. I
CANNOT ping 161.186.86.6 from 161.186.86.5. An ifconfig ctc0 shows that
the RX PACKETS increases by 1 each time I issue a ping from z/OS. This led
me to believe that the pings were getting to Linux from z/OS but not
finding their way back. I use static routes for the CTCs on both Linux and
z/OS. To simplify, I deleted all routes except for the CTC route which is
as follows:
161.186.86.4/30 dev ctc0 proto kernel scope link 161.186.86.6
I could not ping from z/OS. I added the following route and I can ping
Linux from z/OS via CTC all day long.
161.186.0.0/16 via 161.186.86.6 dec ctc0 scope link
If I try 161.186.86.0/24 it does not work. It appears that I am stuck on
class "B" somewhere. Does anyone have any ideas? Thanks.
Peter
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