On Friday, 06/04/2010 at 12:48 EDT, Peter Pauer <[email protected]> wrote: > Adapter 2: vswitch 2, vlan aware, port access, layer 2, OSA card > attached 10.* ip address
> Adapter 2: is connected and not working between the VM guests also not > working on the intranet. Whenever you have a connectivity problem, go back to basics. 1. If the VSWITCH is VLAN aware, it must be plugged into a physical trunk port. 2. The trunk port must be authorized for all of the needed VLANs 3. The NATIVE parameter on DEFINE VSWITCH must match the switch's configured native VLAN ID. 4. Use explicit VLAN authorization for the guests using the VSWITCH. Do not depend on default authorization. That is, put the guest's VLAN id on the SET VSWITCH GRANT or in the ESM. To make it easier to notice a bad configuration, the default VLAN (on DEFINE VSWITCH) should be set to a value that the physical trunk port is NOT authorized to carry. You will then notice in the switch that there are discarded packets when you've made a configuration error. If guests on the same (non-ISOLATED) VSWITCH, in the same VLAN, cannot PING each other, then examine the virtual NIC RX, TX, and DISCARD counts in both servers. This will lead to you to the culprit, which is most likely the wrong IP address or subnet mask. If the guests cannot ping their default gateway: 1. Ensure the port is a trunk port and is authorized for the needed VLANs 2. Ensure the gateway IP is correct for the specific VLAN. If the subnet mask or host IP is wrong, the gateway IP may be correct, but you won't be able to ping it. 3. Ensure the gateway is pingable from some other path 4. Look at the VSWITCH RX, TX, and DISCARD details for the OSA. Discarded packets are bad. 5. Look at the switch's RX, TX, and DISCARD statistics. Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
