If there is a Cisco box with layer 3 function enabled on the other side of the OSA, do a 'show route ospf' in enable mode and let's see what it looks like for the 5.2 and 5.4 cases.
> I have a VM TCPIP stack running level 520 on a z/VM 5.4.0 system. It is > connected to an OSA on one side and a guest lan on the other. (It acts as a > router for the guest lan.) It uses OSPF, so I have a MPROUTE machine going > too. There is a bunch of stuff on the guest lan too, but they don't figure > into this problem. The OSA is shared with a Linux guest which acts as a > firewall for a bunch of Linux servers on a guest lan. So, here's the picture, > 1 OSA shared between 1 VM TCPIP stack and 1 Linux stack. The Linux firewall > is running zebra for dynamic routing. > > All is good, everyone talks to everyone else, until I upgrade the VM TCPIP > stack to level 540. (Same config files.) Both the TCPIP and MPROUTE machines > come up fine. NETSTAT GATE shows that the routes are there and everything > looks OK. The IP on the OSA side pings, no problem. However, the IP on the > guest lan side can't be seen by the network. Pings fail. > Traceroutes go off into the ether. To make things even weirder, the Linux > firewall starts having the same problem. All the Linux servers behind it > suddenly disappear from the network as well. At first, I thought this might > be a VM TCPIP problem, but now I'm not sure. Could this be affecting the > routing tables in the OSA? (Its an OSA Express1 Gbe on a z/990.) > > I'm at a loss on this one. As soon as I switch the VM stack back to 520 > level, everything shows up again, including the Linux servers on the other > guest lan. > > Any ideas? Am I doing something naughty? > > Martha >
