9 More Discussions You Might Find Interesting
1. Virtualization and Cloud Computing
Heyas
So, i like doing custom a LiveImage of my OS.
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2. Red Hat
Hello, please can you help and explain me.
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3. UNIX Desktop Questions & Answers
clear
echo "vans, Rolland"
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4. UNIX for Dummies Questions & Answers
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5. Solaris
hello everyone, I'm a new user and unix-beginner.
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6. Programming
Hi, I got:
host machine: RedHat (RHEL6)
virtual machine: RedHat (RHEL6)
I run (on host machine):
qemu-system-x86_64 ...... -S -s
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gdb
target remote localhost:1234
set architecture i386:x86-64
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Discussion started by: Chrisdot
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7. UNIX for Dummies Questions & Answers
hi i got a virtual linux machine running on qemu
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and than tun tap it?
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Discussion started by: russian460
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8. Filesystems, Disks and Memory
I have a disk image file created for use with the Linux version of the QEMU emulator. It's partitioned. I opened it with fdisk and the partitions show up with some extra messages about physical/logical endings:
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9. UNIX for Advanced & Expert Users
Recently I noticed that my internet connection would not work correctly-although connected domain names could not be resolved. My resolv.conf file was fine since it is configured every time I dial up. a closer inspection showed that my loopback interface had disappearerd! Any ideas why would this... (1 Reply)
Discussion started by: silvaman
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VALE(4) BSD Kernel Interfaces Manual VALE(4)
NAME
vale -- a very fast Virtual Local Ethernet using the netmap API
SYNOPSIS
device netmap
DESCRIPTION
vale is a feature of the netmap(4) module that implements multiple Virtual switches that can be used to interconnect netmap clients, includ-
ing traffic sources and sinks, packet forwarders, userspace firewalls, and so on.
vale is implemented completely in software, and is extremely fast. On a modern machine it can move almost 20 Million packets per second
(Mpps) per core with small frames, and about 70 Gbit/s with 1500 byte frames.
OPERATION
vale dynamically creates switches and ports as clients connect to it using the netmap(4) API.
vale ports are named vale[bdg:][port] where vale is the prefix indicating a VALE switch rather than a standard interface, bdg indicates a
specific switch (the colon is a separator), and port indicates a port within the switch. Bridge and port names are arbitrary strings, the
only constraint being that the full name must fit within 16 characters.
See netmap(4) for details on the API.
LIMITS
vale currently supports up to 4 switches, 16 ports per switch, with 1024 buffers per port. These hard limits will be changed to sysctl vari-
ables in future releases.
SYSCTL VARIABLES
vale uses the following sysctl variables to control operation:
dev.netmap.bridge The maximum number of packets processed internally in each iteration. Defaults to 1024, use lower values to trade
latency with throughput.
dev.netmap.verbose Set to non-zero values to enable in-kernel diagnostics.
EXAMPLES
Create one switch, with a traffic generator connected to one port, and a netmap-enabled tcpdump instance on another port:
tcpdump -ni vale-a:1 &
pkt-gen -i vale-a:0 -f tx &
Create two switches, each connected to two qemu machines on different ports.
qemu -net nic -net netmap,ifname=vale-1:a ... &
qemu -net nic -net netmap,ifname=vale-1:b ... &
qemu -net nic -net netmap,ifname=vale-2:c ... &
qemu -net nic -net netmap,ifname=vale-2:d ... &
SEE ALSO
netmap(4)
http://info.iet.unipi.it/~luigi/vale/
Luigi Rizzo, Giuseppe Lettieri: VALE, a switched ethernet for virtual machines, June 2012, http://info.iet.unipi.it/~luigi/vale/
AUTHORS
The vale switch was designed and implemented in 2012 by Luigi Rizzo and Giuseppe Lettieri at the Universita` di Pisa.
vale was funded by the European Commission within FP7 Projects CHANGE (257422) and OPENLAB (287581).
BSD
July 27, 2012 BSD