Problems getting 2 NICs to work.

[Jeff Vian]

Alexander Dalloz wrote:

>Am Di, den 18.05.2004 schrieb Kevin Kimmell um 15:35:
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>>Ah... rc.local... thanks.
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>No, /etc/rc.local is absolutely the wrong place for any network setup
>routine.
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>>Here are the results that you asked to see. I'm still quite curious as 
>>to how this is actually working.
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>>[root at dtweb02 sysconfig]# route -n
>>Kernel IP routing table
>>Destination     Gateway         Genmask         Flags Metric Ref    Use 
>>Iface
>>12.168.88.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
>>204.117.218.0   0.0.0.0         255.255.255.0   U     0      0        0 eth0
>>127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
>>0.0.0.0         12.168.88.254   0.0.0.0         UG    0      0        0 eth0
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>Ok, both IPs are routed over eth0.
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>>[root at dtweb02 sysconfig]# ip route list
>>12.168.88.0/24 dev eth0  scope link
>>204.117.218.0/24 dev eth0  scope link
>>127.0.0.0/8 dev lo  scope link
>>default via 12.168.88.254 dev eth0
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>Same here.
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>>[root at dtweb02 sysconfig]# ip address list
>>1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
>>    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>>    inet 127.0.0.1/8 scope host lo
>>4: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
>>    link/ether 00:0e:7f:30:52:53 brd ff:ff:ff:ff:ff:ff
>>    inet 12.168.88.12/24 brd 12.168.88.255 scope global eth0
>>    inet 204.117.218.12/24 brd 204.117.218.255 scope global eth0
>>5: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
>>    link/ether 00:0e:7f:30:52:52 brd ff:ff:ff:ff:ff:ff
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>eth1 is not used anyway as it has no IP. Both IPs are assigned to eth0.
>Curious that those different nets can be bound to one physical device.
>Can someone shed any light on this?
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There is no restrictions on binding IPs from multiple networks to a 
single nic.  In fact, if multiple IPs from the same network are on one 
nic it can cause problems. in some situations.

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>>And I couldn't get that last command to run. I tried ifcfg-ethX and 
>>ifcfg-eth0 and ifcfg-eth01 but all commands were not found. Perhaps 
>>they're not in the path?
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>Sorry, misunderstanding: I asked for the contents of
>/etc/sysconfig/network-scripts/ifcfg-eth0 and
>/etc/sysconfig/network-scripts/ifcfg-eth1, to see how you configured
>both ethernet devices. Additional, what does "ifconfig -a" report?
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>Alexander
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