Hi,
The CONFIG_IP_ROUTE_MULTIPATH option does not seem to work in kernel 2.2.12.
I set the same IP address (172.31.20.254) on both interfaces (eth1 & eth1).
My routing table is:
[root@ggkfw /root]# netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
172.31.20.254 0.0.0.0 255.255.255.255 UH 0 0 0 eth1
172.31.20.254 0.0.0.0 255.255.255.255 UH 0 0 0 eth0
172.31.20.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
172.31.20.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 172.31.20.230 0.0.0.0 UG 0 0 0 eth0
However packets sent to machines on the 172.31.20.0/24 subnet all went
through the eth0 interface. According to the interface statistics:
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0 1500 0 542 0 0 0 289 0 0 0 BRU
eth1 1500 0 102 0 0 0 0 0 0 0 BRU
lo 3924 0 50 0 0 0 50 0 0 0 LRU
The arp table entrieas are also refer to the eth0 interface:
[root@ggkfw /root]# arp -a
polyas01.polygon.hu (172.31.20.18) at 7E:99:DB:BD:99:E7 [ether] on eth0
polys20.polygon.hu (172.31.20.17) at 42:00:24:FF:5A:18 [ether] on eth0
netbpe0.polygon.hu (172.31.20.230) at 00:50:73:25:A4:20 [ether] on eth0
gamma.polygon.hu (172.31.20.4) at 02:60:8C:2D:2C:35 [ether] on eth0
pol150e2.polygon.hu (172.31.20.210) at 42:5A:42:5A:42:5A [ether] on eth0
I tried to look at the kernel source and inserted a debug message in the
fib_select_multipath function in the net/ipv4/fib_semantics.c file.
This function never seems to be called.
Any ideas why this did not work?
Thanx, Zoltan Kolb
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