Cornelia - thank you for your reply. I am working from the Redbook: Virtualization Cookbook ... Volume 1 and am finding typos in it. In this case the cio_ignore command was botched up and included in the description before a set of steps to configure hipersockets on RH. it should have been step number 1.
So, I can report partial success, i now have hipersocket network up and the guests can ping each other. But it is deathly slow - nothing hiper about it. Here are the tuning 'knobs' that i am aware of: [1] MTU size my LAN is set up with 64K: DEFINE LAN ZVTSMLAN OWNERID SYSTEM TYPE HIPER IP MFS 64K and the guest has a NICDEF to match: NICDEF 0204 TYPE HIPER DEVICES 3 LAN SYSTEM ZVTSMLAN oddly, when i look at the network connections on linux, it shows the MTU as 57344 (?): # ip a . . . 3: enccw0.0.0204: <BROADCAST,MULTICAST,NOARP,UP,LOWER_UP> mtu 57344 qdisc pfifo_fast state UP group default qlen 1000 link/ether 02:00:00:00:00:5f brd ff:ff:ff:ff:ff:ff inet 192.0.1.32/24 brd 192.0.1.255 scope global noprefixroute enccw0.0.0204 valid_lft forever preferred_lft forever [2] QIOASSIST setting i have QIOASSIST ON system wide and have set in on specifically for the two guests i am testing with - Z4 is a VSE guest, LNXADMIN is ClefOS 7.4 guest: q qioassist z4 ALL USERS SET - ON USER SETTING STATUS Z4 ON ACTIVE Ready; T=0.01/0.01 09:37:01 q qioassist lnxadmin ALL USERS SET - ON USER SETTING STATUS LNXADMIN ON ACTIVE [3] networking buffers should i mess with changing buffers on ClefOS ? (i read somewhere that the default was change from 16 to 128) # lsqeth enccw0.0.0204 Device name : enccw0.0.0204 --------------------------------------------------------------------- card_type : GuestLAN: SYSTEM ZVTSMLAN (Type: HIPERS) cdev0 : 0.0.0204 cdev1 : 0.0.0205 cdev2 : 0.0.0206 chpid : 01 online : 1 portname : no portname required portno : 0 route4 : no route6 : no state : UP (LAN ONLINE) priority_queueing : always queue 2 fake_broadcast : 0 buffer_count : 128 layer2 : 0 isolation : none sniffer : 0 Are there other tuning knobs? How can I figure out why this connection is slow? -- Phillip Gramly Systems Programmer Communications Data Group Champaign, Illinois On Mon, 2018-07-16 at 03:27 -0500, Cornelia Huck wrote: > I'm seconding the suggestion of using chzdev, but some additional > notes > from me: ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu 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/
