On Friday, 07/25/2003 at 03:39 CST, Matt Lashley/SCO <[EMAIL PROTECTED]> wrote: > Is it normal for ifconfig to display all 0's for the MAC address of an OSA > interface? Yes, for QDIO mode. No, for LCS.
> Will this cause problems for the ARP tables/cache of the Cisco router to > which the card is plugged? No. All you are seeing is that the QETH driver is not extracting the MAC address from the card. QDIO is a layer 3 transport protocol that insulates the host from having to deal with layer 2 issues, including MAC. The card handles ARP request & response without help from the host. In LCS mode, the device operates as a layer 2 transport, so MAC is directly visible to the host. > Strangely, on the same machine after taking down the QDIO interface, I can > bring up a second OSA using LCS, configure it with the IP of the QDIO card > and everything routes to the 192.168.x.x machines just fine. It sounds like you forgot to specify "primary" as a QETH configuration option in chandev.conf. Rule: If you are going to route through an OSA attached to a guest, the OSA connection should be defined as primary. > Oh, and by the way, the LCS card, although configured 100Mb/Full Duplex > won't get over 10Mb. -- ? The LAN to which it is connected is 100Mbit/Full > as well. Remember that on VM you only get a slice of the CPU. If the guest doesn't get CPU, it can't drive I/O. Alan Altmark Sr. Software Engineer IBM z/VM Development
