Hi,
I’ve installed a realtek 4 port eth card on a PC where Vyos is running. I’ve set a static ip address for every ethernet port.
this vyos machine is connected to a router with DHCP server.
If I do a network scan i found all the ip addresses of the realtek card I’ve set.
No bridge is set on the vyos machine.
why ?
is it possible to know trough vyos cmd line the ip adr of the linked eth port ?
So many questions.
etc etc. You’ve provided so little information it’s impossible to know the answer to your question.
1- no arp
2- ip scan with ip-advanced scanner software on windows
3- only ip address set for the ethernet port
4- latest rolling
5- no. just linked to other router
6- no
7- no vlan
I’ve only set the following
vyos@vyos:~$ show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface IP Address MAC VRF MTU S/L Description
eth0 192.168.1.101/24 98:b7:xx:xx:xx:40 default 1500 u/u
eth1 - 98:b7:xx:xx:xx:41 default 1500 u/D
eth2 - 98:b7:xx:xx:xx:42 default 1500 u/D
eth3 - 98:b7:xx:xx:xx:43 default 1500 u/D
eth4 192.168.1.102/24 90:1b:0e:xx:xx:6b default 1500 u/D
lo 127.0.0.1/8 00:00:00:00:00:00 default 65536 u/u
::1/128
from a client on the network I ping both the two addresses even only one ethernet port used
From the client where you can ping both addresses, what does the arp table say for
192.168.1.101 and
192.168.1.102
?
If I had to guess though, I suppose the broadcast arp for “Who has 192.168.1.102” is received by 192.168.1.101 and because 102 is also configured on that router, that router replies with “I have 192.168.1.102 at 90:1b:0e:xx:xx:6b” via the known route out eth0.
I don’t really know what the expected behaviour is on a Linux box when you have the same subnet configured on two different L3 interfaces in the same routing domain.
no, on the client the ARP table doesn’t show 192.168.1.10x addresses .
in any case I cannot ping any internet address from vyos box. " network is unreachable"
The client doesn’t show the ARP for them, but it can ping them? How?
What has the Internet got to do with this now? I’m very confused.
I 'd like to add the vyos box on a router lan (that is connected to the wan)
if I set as DHCP client I’m able to g out on the web . if I set a static ip address I cannot go the the web
I’m sorry I can’t help further. First we were debugging apparent LAN bridging but now it’s DHCP+Internet. This is such a confusing scattered approach I can’t help.
I tried to setup as dhcp client or single ethernet port static ip address on vyos box and I don’t see any multiple ip issue .
If I set up a different static ip address for every eth port i I’ve the issue.
this is the physical link schematic :
this is the vyos eth ports configuration :
this is the arp table from a pc connected to the main router (where the vyos router is connected to) :
as you can see I found the same mac address with multiple Ip
If you need isolation, all ports need their own IP subnet, now all of them are in the same subnet.
like
192.168.1.101/24
192.168.2.101/24
192.168.3.101/24
192.168.4.101/24
Technically you can use private vlan or more specific protected vlan to use the same subnet but enforce which interface are allowed to speak to which interface.
However I dont think VyOS supports this (mainly a switch feature and not a router feature).
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