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Old 09-27-2005, 12:14 AM   #1
Registered: Sep 2005
Location: Canada
Distribution: Fedora 12 i386
Posts: 56

Rep: Reputation: 15
ping on wrong interface despite route

I have a fedora core 4 box with 2 NIC's. eth0 is on 172.31.254.x and eth1 is on 172.31.253.x. A third network 172.31.250.x is reachable via eth0.

Whenever I trying to ping from my box, it is going out eth1 - when it should be using eth0. Here is my routing table:

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface * U 0 0 0 eth0 * U 0 0 0 eth0 * U 0 0 0 eth1 * U 0 0 0 eth0
default UG 0 0 0 eth1

Here is the dmesg confirming the pings are going out the wrong interface.

IN= OUT=eth1 SRC= DST= LEN=84 TOS=0x00 PREC=0x00 TTL=64 ID=4 DF PROTO=ICMP TYPE=8 CODE=0 ID=42317 SEQ=4

Why is ping not using the right interface? (why using eth1 not eth0)

Old 09-27-2005, 12:23 AM   #2
Registered: Sep 2005
Location: Canada
Distribution: Fedora 12 i386
Posts: 56

Original Poster
Rep: Reputation: 15
Just to add to the question...when I reboot all of my custom routes are lost. How do I make them permanent?


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