Working out ldom's guest vnet to physical device
(Doc ID 1528250.1)
Last updated on APRIL 18, 2023
Applies to:
Solaris Operating System - Version 11 to 11.1 [Release 11.0]Information in this document applies to any platform.
Symptoms
It can sometime get confusing which interface points to which vSwitch (vsw) and is backed by which physical interface on the Control/Service domain, even more so with renaming virtual NIC and using VLAN's.This document describes commands and steps to understand guest domain network topology using "dladm show-phys" , "ldm ls -al" outputs.
Example:
The system is running ,Oracle Solaris 11.1 SRU 2.5.The administrator named vnets "vnet#" however he didn't follow the usual procedure and start with zero, instead he started with 1. So when he looked at dladm show-phys and the first network was listed as using vet1, however the MAC address was correct for Device ID 0.
1. First the Control/Service domain virtual networking output :-
# ldm list -o network
NAME
primary
MAC
xx:yy:zz:10:46:ea
VSW
NAME MAC NET-DEV ID DEVICE LINKPROP DEFAULT-VLAN-ID PVID VID MTU MODE INTER-VNET-LINK
primary-vsw0 xx:yy:zz:fb:cd:1c ixgbe0 0 switch@0 phys-state 1 2 222,102,103 1500 on
primary-vsw1 xx:yy:zz:fa:b8:d0 ixgbe1 1 switch@1 phys-state 1 102 222,2,103 1500 on
------------------------------------------------------------------------------
NAME
Guest
MAC
xx:yy:zz:f9:04:68
NETWORK
NAME SERVICE ID DEVICE MAC MODE PVID VID MTU LINKPROP
vnet1 primary-vsw0@primary 0 network@0 xx:yy:zz:f8:a4:dd 222 102,103 1500
vnet2 primary-vsw1@primary 1 network@1 xx:yy:zz:fa:01:c7 102 222,103,2 1500
vnet3 primary-vsw0@primary 2 network@2 xx:yy:zz:f9:34:09 222 102,103 1500
vnet4 primary-vsw1@primary 3 network@3 xx:yy:zz:fa:aa:52 102 222,103,2 1500
on the LDOM control domain, please note the vnet names, device ID's and MAC addresses.
From Guest LDOM, dladm show-phys output and ifconfig out put for those devices.
note that net0 lists the device as vnet0 and has a MAC address for vnet1 as shown in the previous post.
# dladm show-phys
LINK MEDIA STATE SPEED DUPLEX DEVICE
net2 Ethernet up 0 unknown vnet2
net3 Ethernet up 0 unknown vnet3
Notice here that as this is solaris 11.x guest ldom net0 is vanity name of device "vnet0"
root@Guest:~# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
net2: flags=1004843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
inet xx.xx.xx.xx netmask ffffff00 broadcast xx.xx.xx.255
ether xx:yy:zz:f9:34:9
net3: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet xx.xx.xx.xx netmask ffffff00 broadcast xx.xx.xx.255
ether xx:yy:zz:fa:aa:52
[..]
Cause
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