BTW: try to ping 127.0.0.1, 127.0.0.2, 127.0.0.3............ here they are pingable as default the instruction below if only needed if the application checks that a configured IP exists via ifconfig or lookalike Am 29.08.2013 15:46, schrieb Reindl Harald: > Am 29.08.2013 15:38, schrieb John Chludzinski: >> I need to used multiple loopback addresses (interfaces) for an server >> application that communicates with multiple clients running on the same >> machine. Since a loopback interface short circuits the network stack >> (looping back in the IP layer) it is a more efficient means of >> communication, hence better for my purpose. >> >> How do I define multiple loopback interfaces? >> >> BTW, I'm a newbie to this mailing mailing list. Hopefully this is an >> appropriate question? > > if you are running network.service it's trivial > NetworkManager -> no ida, i do not touch it > ___________________________________________ > > [root@rh:/etc/sysconfig/network-scripts]$ cat /etc/sysconfig/network-scripts/ifcfg-lo:1 > DEVICE=lo:1 > IPADDR=127.0.0.2 > ONPARENT=yes > > [root@rh:/etc/sysconfig/network-scripts]$ ifup lo:1 > > [root@rh:/etc/sysconfig/network-scripts]$ ifconfig lo:1 > lo:1: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 > inet 127.0.0.2 netmask 255.0.0.0 > loop txqueuelen 0 (Lokale Schleife) > > [root@rh:/etc/sysconfig/network-scripts]$ ping 127.0.0.2 > PING 127.0.0.2 (127.0.0.2) 56(84) bytes of data. > 64 bytes from 127.0.0.2: icmp_seq=1 ttl=50 time=0.056 ms > ___________________________________________ > > that's the "lo" config shipped with Fedora > > [root@rh:/etc/sysconfig/network-scripts]$ cat /etc/sysconfig/network-scripts/ifcfg-lo > DEVICE=lo > IPADDR=127.0.0.1 > NETMASK=255.0.0.0 > NETWORK=127.0.0.0 > # If you're having problems with gated making 127.0.0.0/8 a martian, > # you can change this to something else (255.255.255.255, for example) > BROADCAST=127.255.255.255 > ONBOOT=yes > NAME=loopback
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