Hi ALL
I am using system (Linux kernel 2.6.9) with two
network cards. It is connected to LAN (10.0.0.0).
The ips of two NIC are for eth0 10.0.0.18 and for eth1
10.0.0.46.
Linux System network configuration
------------------------------------------------------------------------------
# ifconfig
eth0 Link encap:Ethernet HWaddr
00:14:C2:59:E5:ED
inet addr:10.0.0.18 Bcast:10.0.0.255
Mask:255.255.255.0
inet6 addr: fe80::214:c2ff:fe59:e5ed/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500
Metric:1
RX packets:4692 errors:11556 dropped:0
overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0
carrier:0
collisions:2 txqueuelen:1000
RX bytes:645746 (630.6 KiB) TX bytes:798
(798.0 b)
Interrupt:209 Memory:fddf0000-fde00000
eth1 Link encap:Ethernet HWaddr
00:14:C2:59:E5:EC
inet addr:10.0.0.46 Bcast:10.0.0.255
Mask:255.255.255.0
inet6 addr: fe80::214:c2ff:fe59:e5ec/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500
Metric:1
RX packets:4535 errors:11561 dropped:0
overruns:0 frame:0
TX packets:1649 errors:0 dropped:0
overruns:0 carrier:0
collisions:12 txqueuelen:1000
RX bytes:635178 (620.2 KiB) TX bytes:105841
(103.3 KiB)
Interrupt:217 Memory:fdde0000-fddf0000
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:40 errors:0 dropped:0 overruns:0
frame:0
TX packets:40 errors:0 dropped:0 overruns:0
carrier:0
collisions:0 txqueuelen:0
RX bytes:3232 (3.1 KiB) TX bytes:3232 (3.1
KiB)
The routing table is
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags
Metric Ref Use Iface
10.0.0.0 0.0.0.0 255.255.255.0 U 0
0 0 eth0
10.0.0.0 0.0.0.0 255.255.255.0 U 0
0 0 eth1
0.0.0.0 10.0.0.7 0.0.0.0 UG 0 0 0
eth0
----------------------------------------------------------------------------
I am doing IO from two different machine(machine 1 and
mahcine 2) to this system one through eth0 and other
through
eth1
(both machines are on same network see network
configuration below) but The whole traffic is seems to
traverse
through eth0 on linux system.
Machine 1 ->
-----------------------------------------------------------------------------
E:\>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 10.0.0.42
Subnet Mask . . . . . . . . . . . :
255.255.255.0
Default Gateway . . . . . . . . . :
E:\>route PRINT
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback
interface
0x2 ...00 0f fe 25 f1 d3 ...... Broadcom NetXtreme
Gigabit Ethernet - Packet Sch
eduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway
Interface Metric
10.0.0.0 255.255.255.0 10.0.0.42
10.0.0.42 20
10.0.0.42 255.255.255.255 127.0.0.1
127.0.0.1 20
10.255.255.255 255.255.255.255 10.0.0.42
10.0.0.42 20
127.0.0.0 255.0.0.0 127.0.0.1
127.0.0.1 1
224.0.0.0 240.0.0.0 10.0.0.42
10.0.0.42 20
255.255.255.255 255.255.255.255 10.0.0.42
10.0.0.42 1
===========================================================================
Persistent Routes:
None
---------------------------------------------------------------------------
mahcine 2 ->
---------------------------------------------------------------------------
E:\>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 10.0.0.53
Subnet Mask . . . . . . . . . . . :
255.255.255.0
Default Gateway . . . . . . . . . :
E:\>route PRINT
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback
interface
0x2 ...00 0f fe 54 e2 a5 ...... Broadcom NetXtreme
Gigabit Ethernet - Packet Sch
eduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway
Interface Metric
10.0.0.0 255.255.255.0 10.0.0.53
10.0.0.53 20
10.0.0.53 255.255.255.255 127.0.0.1
127.0.0.1 20
10.255.255.255 255.255.255.255 10.0.0.53
10.0.0.53 20
127.0.0.0 255.0.0.0 127.0.0.1
127.0.0.1 1
224.0.0.0 240.0.0.0 10.0.0.53
10.0.0.53 20
255.255.255.255 255.255.255.255 10.0.0.53
10.0.0.53 1
===========================================================================
Persistent Routes:
None
---------------------------------------------------------------------------
I have made some changes to netmask of both IP
addresss of linux system so that both will have
different network address.
#ifconfig eth0 netmask 255.255.255.224
#ifconfig eth1 netmask 255.255.255.224
now the routing table after restarting the netowrk
service is
#route -n
Kernel IP routing table
Destination Gateway Genmask Flags
Metric Ref Use Iface
10.0.0.32 0.0.0.0 255.255.255.224 U 0
0 0 eth1
10.0.0.0 0.0.0.0 255.255.255.224 U 0
0 0 eth0
0.0.0.0 10.0.0.7 0.0.0.0 UG 0 0 0
eth0
But now when I am performing I/O on through machine 1
and 2 through eth0 and eth1 all traffic is on eth1.
If any one having solution for this that will be great
help. ALso if someone could tell me why after changing
netmask its not working the way I want? Am I missing
anything?
TIA
Satinder
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