mcclnx mcc wrote:
I have two DELL servers with two Ethernet ports in it.
Bith servers have CENTOS 4.5 installed. First
Ethernet port connect to public Ethernet line and work
correctly. Second Ethernet port I connect
point-to-point as private Ethernet (cable direct
connect without router or switch). Private Ethernet
use IP asddress 1.1.1.1 and 1.1.1.2.
Take a quick look at RFC 1918 for priviate addresses to use (I am a
co-author of that RFC).
Advice:
If you use addresses from the 192.168 range, avoid the nets:
192.168.0.0, 192.168.1.0, 192.168.2.0, and 192.168.100.0 These are
commonly used by various 'appliances'. Choose something 'wierd' like
192.168.49.0 (or some other prime number less than 255). Though I tend
to use 192.168.64.0, 192.168.96.0, or 192.168.128.0
Also avoid the 172.16 and 10. ranges. These are commonly used in
Company internal private networks, and if you want to 'VPN' to them, it
can cause unwanted results (like it won't work).
This is general advice to anyone using private addresses for small
usages (from a person that has taken more flak on private addresses and
NAT than you probably care to deal with; I 'caused it').
I check "ifconfig -a" and both eth0 and eth1 are up
and active. when I tried to ping another server use
second port (private) and no response. Does anything
I configure wrong?
Thanks.
======== info ===
%ifconfig -a
eth0 Link encap:Ethernet HWaddr
00:08:74:EA:54:64
inet addr:172.29.86.15 Bcast:172.29.85.255
Mask:255.255.255.0
inet6 addr: fe80::208:74ff:feea:5464/64
Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500
Metric:1
RX packets:471 errors:0 dropped:0 overruns:0
frame:0
TX packets:91 errors:0 dropped:0 overruns:0
carrier:0
collisions:0 txqueuelen:0
RX bytes:65669 (64.1 KiB) TX bytes:11847
(11.5 KiB)
eth1 Link encap:Ethernet HWaddr
00:0E:2E:C8:B9:80
inet addr:1.1.1.1 Bcast:1.1.1.255
Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0
frame:0
TX packets:0 errors:0 dropped:0 overruns:0
carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:18 Base address:0x4c00
%ping 1.1.1.2
PING 1.1.1.2 (1.1.1.2) 56(84) bytes of data.
>From 1.1.1.1 icmp_seq=1 Destination Host Unreachable
>From 1.1.1.1 icmp_seq=2 Destination Host Unreachable
>From 1.1.1.1 icmp_seq=3 Destination Host Unreachable
--- 1.1.1.2 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100%
packet loss, time 3015ms
, pipe 3
%telnet 1.1.1.2
Trying 1.1.1.2...
telnet: connect to address 1.1.1.2: No route to host
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