I am curious as to how these netmask settings will effect the way my routes will be handled. If I use a /32, what does that mean....or more specifically, what is going on here?
FreeBSD does not let you configure two network interfaces on the same network, because routing table entries need to be unique. Giving the second NIC a different subnet (the /32) associates it with a different entry in the routing table.
Also.....what I want to do here, or at least, think that I want to do, is have traffic come and go out of each NIC, respectively. I don't want traffic to come in fxp1 and go out of fxp0. I want this to occur because I am going to use dummynet to handle some bandwidth issues.
A single NIC runs as fast as the network connection will go. Having two NICs on the same network doesn't usually make things go faster [1], although it might be useful for redundancy in case one NIC fails (see netgraph).
What is the default behavior in this respect in FreeBSD when just adding another NIC to a system and not making any other changes?
If the kernel or a module contains a driver for the NIC, the system will bind to the device but leave the interface down. The interface will be a candidate for things like dhclient, or if can be configured by ifconfig as normal.
-- -Chuck
[1]: For normal network topologies involving hubs, anyway. If you've got a switch, the question becomes more complex, but you would be better off configuring a seperate VLAN and using different subnets if you've got redundant NICs.
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