Dear all,
We aim at evaluating some recent Data center architectures such as
CamCube, FiConn, and Dcell, that can provide some good features
including scale, bandwidth, fault-tolerance, scalability, overheads and
deployment costs. In the mentioned architectures, servers act as not
only end hosts, but also relay nodes for each other. In other words,
Servers have multi-cards and can be connected directly to other servers
without passing via a bridge or an OVS.
I am wondering whether or not we can add additional interfaces to VMs
and to interconnect any two VMs directly via a virtual cable as we did
with "ip link" for name-spaces. Let us consider a simple scenario where
all the VMs are belonging to the same tenant or project and hosted on
the same physical server.
More specifically, let's say that using network name-spaces we can do it
easily as follow, and we want to do the same for compute VMs.
Create two net NameSpaces and inter-connect them via direct veth link
------------------------------------------------------
$ sudo ip netns add vm1
$ sudo ip netns add vm2
$ sudo ip link add name veth1 type veth peer name veth2
$ sudo ip link set dev veth2 netns vm2
$ sudo ip link set dev veth1 netns vm1
$ sudo ip netns exec vm2 ip link set dev veth2 up
$ sudo ip netns exec vm1 ip link set dev veth1 up
$ sudo ip netns exec vm2 ip address add 10.1.1.2/24 dev veth2
$ sudo ip netns exec vm1 ip address add 10.1.1.1/24 dev veth1
$ sudo ip netns exec vm1 bash
# ifconfig
veth1 Link encap:Ethernet HWaddr 1e:d8:69:ba:76:e2
inet addr:10.1.1.1 Bcast:0.0.0.0 Mask:255.255.255.0
inet6 addr: fe80::1cd8:69ff:feba:76e2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:648 (648.0 B) TX bytes:648 (648.0 B)
# ping 10.1.1.2
PING 10.1.1.2 (10.1.1.2) 56(84) bytes of data.
64 bytes from 10.1.1.2: icmp_seq=1 ttl=64 time=0.051 ms
64 bytes from 10.1.1.2: icmp_seq=2 ttl=64 time=0.061 ms
64 bytes from 10.1.1.2: icmp_seq=3 ttl=64 time=0.072 ms
^C
--- 10.1.1.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1998ms
--------------------------------------------------------------
Thanks in advance,
Abdulhalim
--
Abdulhalim Dandoush
-------------------------------
PhD in Information Technology
Researcher-Teacher
ESME Sudria, Paris Sud
Images, Signals and Networks Lab
Tel: +33 1 56 20 62 33
Fax: +33 1 56 20 62 62
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