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Re: [lwip-users] Virtual machines in the same host (bridge).
From: |
Sylvain Rochet |
Subject: |
Re: [lwip-users] Virtual machines in the same host (bridge). |
Date: |
Fri, 30 Jan 2015 11:43:49 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Hi,
On Fri, Jan 30, 2015 at 08:28:20AM -0200, Norberto R. de Goes Jr. wrote:
> Hello Sylvain.
> Below the information asked by you. Thanks in advance!
> Norberto
>
>
> >>>>>>>>>> VM#1 (with lwip app):
>
> address@hidden norberto]# brctl show
> bridge name bridge id STP enabled interfaces
> br0 8000.080027c07dab no p2p1
> tap0
Looks good.
> address@hidden norberto]#
> address@hidden norberto]# ip a s
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> inet 127.0.0.1/8 scope host lo
> inet6 ::1/128 scope host
> valid_lft forever preferred_lft forever
> 2: p2p1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
> pfifo_fast master br0 state UP qlen 1000
> link/ether 08:00:27:c0:7d:ab brd ff:ff:ff:ff:ff:ff
> inet6 fe80::a00:27ff:fec0:7dab/64 scope link
> valid_lft forever preferred_lft forever
UP ok.
> 4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
> link/ether 08:00:27:c0:7d:ab brd ff:ff:ff:ff:ff:ff
> inet 169.254.8.218/16 brd 169.254.255.255 scope global br0
> inet6 fe80::7084:1aff:fe21:998f/64 scope link
> valid_lft forever preferred_lft forever
UP ok.
> 5: tap0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
> pfifo_fast master br0 state UNKNOWN qlen 500
> link/ether 8e:f4:c4:a8:9a:c8 brd ff:ff:ff:ff:ff:ff
> inet6 fe80::8cf4:c4ff:fea8:9ac8/64 scope link
> valid_lft forever preferred_lft forever
UP ok.
Note you need to use something inside 169.254.0.0/16 in lwIP as well and
please check the netmask is fine on the lwIP stack. I am not sure it is
not actually enforced to something like /24.
> address@hidden norberto]#
> address@hidden norberto]# ip r s
> 169.254.0.0/16 dev br0 proto kernel scope link src 169.254.8.218
> address@hidden norberto]#
>
> >>>>>>>>>> VM#2 (ping executor):
>
> address@hidden norberto]# brctl show
> bridge name bridge id STP enabled interfaces
> address@hidden norberto]#
> address@hidden norberto]# ip a s
> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> inet 127.0.0.1/8 scope host lo
> inet6 ::1/128 scope host
> valid_lft forever preferred_lft forever
> 2: p2p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
> UP qlen 1000
> link/ether 08:00:27:a8:38:00 brd ff:ff:ff:ff:ff:ff
> inet 169.254.4.39/16 brd 169.254.255.255 scope global p2p1
> inet6 fe80::a00:27ff:fea8:3800/64 scope link
> valid_lft forever preferred_lft forever
UP ok.
> address@hidden norberto]#
> address@hidden norberto]# ip r s
> 169.254.0.0/16 dev p2p1 proto kernel scope link src 169.254.4.39
> 224.0.0.0/4 dev p2p1 proto static
> address@hidden norberto]#
It should work if fedora2.p2p1 and fedora.p2p1 are properly bridged on
host, check the lwIP netmask then tcpdump's your friend :)
Sylvain
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