On 29/01/2008, Olivier Nicole <[EMAIL PROTECTED]> wrote: > > 1) is there an upper limit to configuring a number of alias addresses? > > I have a machine with 200+ IP without any problem. > > > 2) if an interface is configured with an alias address, then what > > address is shown on the traffic leaving this interface? So, for > > example, if I were to ping this machine on its primary address, I > > expect to get a response from the primary address of the interface. > > What happens if I ping an alias address, would I get a response from > > By default exiting traffic is using the primary address (the one > defined with no keyword alias in the ifconfig). I think there is a way > to choose the exiting IP. > > When a paket is responding, it use the same IP that was used in the > query (else any firewall would be confused in the way). > > > > 3) In the above scenario, all traffic leaving the interface > > (regardless of the source IP on it) will have the same MAC address > > (the one of the interface) - is that right? > > > Right except maybe some NIC that allow several MAC addresses? That > could be used in hi availability? > > > > 4) Does anyone know if there are there any other network > > characteristics or behaviour by which we can distinguish a machine > > having more than one IP address (primary plus alias) configued on one > > of its interface? > > > Once you cross a router, you don't see the MAC of the machine anymore, > MAC is local to your LAN anyway. > > Olivier > > >
One last thing I wanted to know (sorry to email after a long delay), in order for me to add aliases that I want to remain configured on the machine at every boot, I can simply add, for exmaple, the following lines to the rc.conf file? ifconfig_ed0_alias0="inet 127.0.0.251 netmask 0xffffffff" ifconfig_ed0_alias1="inet 127.0.0.252 netmask 0xffffffff" ifconfig_ed0_alias2="inet 127.0.0.253 netmask 0xffffffff" Just want to know, as I want to configure about 253 addresses as an alias on a single machine (along with the primary address, this will be 254 address, a whole C-class subnet) - and would like these entries to hold when I boot. Also, is there any shortcut to adding a range of net/host address or would I have to add a line for each address? Thanks _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"