Classified as: {OPEN}
Hi,
I have built a qemu emulation of an old solaris 2.5 1 system over a redhat 9
virtualized server.
This VM redhat9 is hosted over ESX ( Vsphere 8.0.3.XXXX) of VmWare.
Unfortunately, that qemu client is experiencing network latency .
Sometimes I am unable to remote login to it and I observe quite a lot of ICMP
packets lost.
My Redhat 9 has 2 interfaces.
* 1 interface is reserved for the redhat 9, traffic (ens33).
* the other interface (ens38 / master br0) is connected to a bridge (br0),
which is also connected to a tap device (master br0); this tap device is used
to provide the interface to the qemu client.
See below.
[root@redhat9 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group
default qlen 1000 <<<<<<<<
reserved for the redhat 9host
link/ether 00:50:56:b2:77:51 brd ff:ff:ff:ff:ff:ff
altname enp2s1
inet 10.97.0.197/24 brd 10.97.0.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
3: ens38: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br0 state
UP group default qlen 1000
link/ether 00:50:56:b2:a9:a2 brd ff:ff:ff:ff:ff:ff
altname enp2s6
<<<<<
for QEMU client
4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group
default qlen 1000
link/ether 00:50:56:b2:a9:a2 brd ff:ff:ff:ff:ff:ff
5: tap0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0
state UP group default qlen 1000
link/ether c6:72:a5:a7:29:32 brd ff:ff:ff:ff:ff:ff
[root@redhat9 ~]#
The network configuration of the qemu client is as follow
qemu_root(1) ifconfig -a
lo0: flags=849<UP,LOOPBACK,RUNNING,MULTICAST> mtu 8232
inet 127.0.0.1 netmask ff000000
le0: flags=863<UP,BROADCAST,NOTRAILERS,RUNNING,MULTICAST> mtu 1500
inet 10.97.0.113 netmask ffffff00 broadcast 10.97.0.255
ether 8:0:20:83:b6:ad
qemu_root(2) qopernic_root(2) netstat -rn
Routing Table:
Destination Gateway Flags Ref Use Interface
-------------------- -------------------- ----- ----- ------ ---------
127.0.0.1 127.0.0.1 UH 0 0 lo0
10.97.0.0 10.97.0.113 U 3 98 le0
224.0.0.0 10.97.0.113 U 3 0 le0
default 10.97.0.1 UG 0 0
qemu_root(3)
If anyone has some experience of such issue I would appreciate if I could have
some advises .
I am wondering where my packets get lost....
Kind regards,
AlainR
{OPEN}
