Please HELP ME with connection issue on Proxmo (basic networking)

[Altar]

Hello all.
On first, sorry for my poor english.

I'm new in use of Proxmox and I don't understand WHY I HAVE this problem what I have.
Its basic networking problem.

SCHEMA:



Situation:
From PROXMOX environment I can ping the router (192.168.3.1) and the Debian VM (192.168.3.3).
From Debian VM I can ping Proxmox (192.168.3.2) BUT I CAN'T PING ROUTER (192.168.3.1) and I don't know WHY.
Im tried everything but nothing with success.
So guys, PLEASE, where is the problem?

List:

root@debian:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 22:99:78:a4:aa:ab                                                
inet addr:192.168.3.3  Bcast:192.168.3.255  Mask:255.255.255.0                             
inet6 addr: fe80::2099:78ff:fea4:aaab/64 Scope:Link                                          
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1                                           
RX packets:3604 errors:0 dropped:0 overruns:0 frame:0                                        
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0                                        
collisions:0 txqueuelen:0                                                                    
RX bytes:205607 (200.7 KiB)  TX bytes:664 (664.0 B)

root@debian:~# route                                                                         
Kernel IP routing table                                                                      
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface                
192.168.3.0     *               255.255.255.0   U     0      0        0 eth0

From PROXMOX:

auto lo
iface lo inet loopback

auto vmbr0
iface vmbr0 inet static
        address 192.168.3.2
        netmask 255.255.255.0
        gateway 192.168.3.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

root@pve:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 08:00:27:ef:67:85
          inet6 addr: fe80::a00:27ff:feef:6785/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:145457 errors:0 dropped:0 overruns:0 frame:0
          TX packets:62435 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:164360906 (156.7 MiB)  TX bytes:10232042 (9.7 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:10269 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10269 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:5088361 (4.8 MiB)  TX bytes:5088361 (4.8 MiB)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00                                                  -00
          inet6 addr: fe80::1/128 Scope:Link
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:3 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

veth100.0 Link encap:Ethernet  HWaddr 16:e2:35:f5:e4:7a
          inet6 addr: fe80::14e2:35ff:fef5:e47a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4039 errors:0 dropped:70 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:664 (664.0 B)  TX bytes:231649 (226.2 KiB)

vmbr0     Link encap:Ethernet  HWaddr 08:00:27:ef:67:85
          inet addr:192.168.3.2  Bcast:192.168.3.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:feef:6785/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:128743 errors:0 dropped:0 overruns:0 frame:0
          TX packets:62427 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:156910354 (149.6 MiB)  TX bytes:10231630 (9.7 MiB)

root@pve:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.3.0     *               255.255.255.0   U     0      0        0 vmbr0
default         192.168.3.1     0.0.0.0         UG    0      0        0 vmbr0

THANK YOU FOR ANY ADVICE

 

[Mr.Holmes]

Hello Altar

From PROXMOX environment I can ping the router (192.168.3.1) and the Debian VM (192.168.3.3).
From Debian VM I can ping Proxmox (192.168.3.2) BUT I CAN'T PING ROUTER (192.168.3.1) and I don't know WHY.
Im tried everything but nothing with success.

As far as I see your basic configuration is quite correct and it should work. But: as soon if the vm has started an additional NIC should occur in ipconfig (if not, the virtual NIC of the VM is not correctly configured).

However, in order to follow the packages and discover where they are "lost" do the following (assuming the vmś id is "100"):

#in the vm:
tcpdump -e -n -i eth0
#in the host:
tcpdump -e -n -i tap100i0
tcpdump -e -n -i vmbr0
tcpdump -e -n -i eth0

if working correctly each package from vm to router flows like this:

eth0(vm) - tap100i0 - vmbr0 - eth0(host)

You have to start each command seperately at another console - then observe what happens.

Good luck!

Mr.Holmes