From: centos-bounces@xxxxxxxxxx
[mailto:centos-bounces@xxxxxxxxxx] On Behalf Of Ray Leventhal
>
> Hi all,
>
> I need to (quickly!grrr) update IP addresses for which a given machine
> will answer.
>
> I did this:
>
> /sbin/ifconfig eth0:0 xx.xx.xx.10 netmask 255.255.255.0
> /sbin/ifconfig eth0:1 xx.xx.xx.11 netmask 255.255.255.0
> /sbin/ifconfig eth0:2 xx.xx.xx.30 netmask 255.255.255.0
> /sbin/ifconfig eth0:3 xx.xx.xx.31 netmask 255.255.255.0
> /sbin/ifconfig eth0:4 xx.xx.xx.13 netmask 255.255.255.0
> /sbin/ifconfig eth0:5 xx.xx.xx.15 netmask 255.255.255.0
> /sbin/ifconfig eth0:6 xx.xx.xx.20 netmask 255.255.255.0
> /sbin/ifconfig eth0:7 xx.xx.xx.21 netmask 255.255.255.0
> /sbin/ifconfig eth0:8 xx.xx.xx.22 netmask 255.255.255.0
>
>
> but on looking at the output of /sbin/ifconfig, I see this:
>
> [root@sunspot ray]# /sbin/ifconfig
> eth0 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:64.135.16.15 Bcast:64.135.16.255
> Mask:255.255.255.0
> inet6 addr: fe80::200:c5ff:fec2:1b01/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:5491775 errors:0 dropped:0 overruns:0 frame:0
> TX packets:962501 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:436018277 (415.8 MiB) TX bytes:156248463
> (149.0 MiB)
> Interrupt:12 Base address:0xcf00
>
> eth0:0 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.10 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:1 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.11 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:2 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.30 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:3 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.31 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:4 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.13 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:5 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.15 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:6 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.20 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:7 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.21 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> eth0:8 Link encap:Ethernet HWaddr 00:00:C5:C2:1B:01
> inet addr:xx.xx.xx.22 Bcast:xx.xx.xx.255
> Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interrupt:12 Base address:0xcf00
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:5744 errors:0 dropped:0 overruns:0 frame:0
> TX packets:5744 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:591811 (577.9 KiB) TX bytes:591811 (577.9 KiB)
>
>
> And this, in /var/log/messages
> [root@sunspot ray]# tail /var/log/messages
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.15 on eth0.
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.20 on eth0.
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Withdrawing address record
> for xx.xx.xx.20 on eth0.
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.20 on eth0.
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.21 on eth0.
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Withdrawing address record
> for xx.xx.xx.21 on eth0.
> Sep 7 06:50:31 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.21 on eth0.
> Sep 7 06:50:33 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.22 on eth0.
> Sep 7 06:50:33 sunspot avahi-daemon[2203]: Withdrawing address record
> for xx.xx.xx.22 on eth0.
> Sep 7 06:50:33 sunspot avahi-daemon[2203]: Registering new address
> record for xx.xx.xx.22 on eth0.
>
>
> How can I get my NIC to accept traffic for these IPs?
If the secondaries are on a different subnet then the primary then you
will need to add routing entries for those subnets pointing out eth0.
-Ross
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