kewlemer
2007-11-01, 06:31 PM CDT
I'm running x86_64 Fedora7 host and 32 bit Fedora 7 guest on KVM using virt-manager. Here
what the default bridged network setting gave me -
HOST -
[root fed-amd64 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1A:A0:56:52:E5
inet addr:192.168.1.9 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21a:a0ff:fe56:52e5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:4144 errors:0 dropped:0 overruns:0 frame:0
TX packets:4490 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3143529 (2.9 MiB) TX bytes:1026716 (1002.6 KiB)
Interrupt:23 Base address:0x6000
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:16436 Metric:1
RX packets:11074 errors:0 dropped:0 overruns:0 frame:0
TX packets:11074 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:49074613 (46.8 MiB) TX bytes:49074613 (46.8 MiB)
virbr0 Link encap:Ethernet HWaddr 00:FF:EE:14:6D:91
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61 errors:0 dropped:0 overruns:0 frame:0
TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9261 (9.0 KiB) TX bytes:12220 (11.9 KiB)
vnet0 Link encap:Ethernet HWaddr 00:FF:EE:14:6D:91
inet6 addr: fe80::2ff:eeff:fe14:6d91/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61 errors:0 dropped:0 overruns:0 frame:0
TX packets:61 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:10115 (9.8 KiB) TX bytes:7195 (7.0 KiB)
[root fed-amd64 ~]#
Here is what the GUEST landed up with when using the default configuration-
[root fed-guest ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:3E:6B:C6:36
inet addr:192.168.122.195 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::216:3eff:fe6b:c636/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:4144 errors:0 dropped:0 overruns:0 frame:0
TX packets:4490 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3143529 (2.9 MiB) TX bytes:1026716 (1002.6 KiB)
Interrupt:23 Base address:0x6000
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:16436 Metric:1
RX packets:11074 errors:0 dropped:0 overruns:0 frame:0
TX packets:11074 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:49074613 (46.8 MiB) TX bytes:49074613 (46.8 MiB)
virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61 errors:0 dropped:0 overruns:0 frame:0
TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9261 (9.0 KiB) TX bytes:12220 (11.9 KiB)
[root fed-guest ~]#
To be more specific, I'm doing a tcpdump on guest's
eth0(192.168.122.195). When the host pings 192.168.122.195, I see
following -
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
12:15:49.058031 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:51.065437 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:52.069123 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:53.071852 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:55.077218 arp who-has 192.168.122.195 tell 192.168.122.1
When the guest's eth0 is receiving ARP for it's right IP address, why
is it not responding?
Here are the routing tables -
HOST-
[root fed-amd64 ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
[root fed-amd64 ~]#
GUEST-
[root guest~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 eth0
[root guest ~]#
So basically my problem is that I'm unable to ping the guest (192.168.122.195) from the host. tcpdump shows that guest is not responding to ARPs
for 192.168.122.195. Can anyone tell me why? I can ping the host's eth0 from the guest though.
Thanks in advance,
KM
what the default bridged network setting gave me -
HOST -
[root fed-amd64 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:1A:A0:56:52:E5
inet addr:192.168.1.9 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21a:a0ff:fe56:52e5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:4144 errors:0 dropped:0 overruns:0 frame:0
TX packets:4490 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3143529 (2.9 MiB) TX bytes:1026716 (1002.6 KiB)
Interrupt:23 Base address:0x6000
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:16436 Metric:1
RX packets:11074 errors:0 dropped:0 overruns:0 frame:0
TX packets:11074 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:49074613 (46.8 MiB) TX bytes:49074613 (46.8 MiB)
virbr0 Link encap:Ethernet HWaddr 00:FF:EE:14:6D:91
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61 errors:0 dropped:0 overruns:0 frame:0
TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9261 (9.0 KiB) TX bytes:12220 (11.9 KiB)
vnet0 Link encap:Ethernet HWaddr 00:FF:EE:14:6D:91
inet6 addr: fe80::2ff:eeff:fe14:6d91/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61 errors:0 dropped:0 overruns:0 frame:0
TX packets:61 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:10115 (9.8 KiB) TX bytes:7195 (7.0 KiB)
[root fed-amd64 ~]#
Here is what the GUEST landed up with when using the default configuration-
[root fed-guest ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:3E:6B:C6:36
inet addr:192.168.122.195 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::216:3eff:fe6b:c636/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:4144 errors:0 dropped:0 overruns:0 frame:0
TX packets:4490 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3143529 (2.9 MiB) TX bytes:1026716 (1002.6 KiB)
Interrupt:23 Base address:0x6000
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:16436 Metric:1
RX packets:11074 errors:0 dropped:0 overruns:0 frame:0
TX packets:11074 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:49074613 (46.8 MiB) TX bytes:49074613 (46.8 MiB)
virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:61 errors:0 dropped:0 overruns:0 frame:0
TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9261 (9.0 KiB) TX bytes:12220 (11.9 KiB)
[root fed-guest ~]#
To be more specific, I'm doing a tcpdump on guest's
eth0(192.168.122.195). When the host pings 192.168.122.195, I see
following -
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
12:15:49.058031 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:51.065437 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:52.069123 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:53.071852 arp who-has 192.168.122.195 tell 192.168.122.1
12:15:55.077218 arp who-has 192.168.122.195 tell 192.168.122.1
When the guest's eth0 is receiving ARP for it's right IP address, why
is it not responding?
Here are the routing tables -
HOST-
[root fed-amd64 ~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
[root fed-amd64 ~]#
GUEST-
[root guest~]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0
192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 192.168.122.1 0.0.0.0 UG 0 0 0 eth0
[root guest ~]#
So basically my problem is that I'm unable to ping the guest (192.168.122.195) from the host. tcpdump shows that guest is not responding to ARPs
for 192.168.122.195. Can anyone tell me why? I can ping the host's eth0 from the guest though.
Thanks in advance,
KM