IPv6 address disappeared from interface

Hi,

I'm using Red Hat Enterprise Linux AS release 4 (Nahant Update 4) version.
If an interface is configured with IPv6 global addresses and it made DOWN,
then all the ipv6 addresses gets removed. Even if the interface back to UP,
those global addresses are not coming back and needs to be reconfigured
manually. Is this an expected behavior ?


[root@lnx213-42 ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:14:5E:FA:BC:D2
inet addr:10.72.213.42 Bcast:10.72.213.255 Mask:255.255.255.0
inet6 addr: 3ffe:81d0:201:109::88/0 Scope:Global <========
global ipv6 address
inet6 addr: fe80::214:5eff:fefa:bcd2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:262 (262.0 b)
Interrupt:169 Memory:ce000000-ce011100

[root@lnx213-42 ~]#
[root@lnx213-42 ~]# ifconfig eth1 down
[root@lnx213-42 ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:14:5E:FA:BC:D2
inet addr:10.72.213.42 Bcast:10.72.213.255 Mask: 255.255.255.0
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:262 (262.0 b)
Interrupt:169 Memory:ce000000-ce011100

[root@lnx213-42 ~]#
[root@lnx213-42 ~]# ifconfig eth1 up
[root@lnx213-42 ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:14:5E:FA:BC:D2
inet addr:10.72.213.42 Bcast:10.72.213.255 Mask:255.255.255.0
inet6 addr: fe80::214:5eff:fefa:bcd2/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:169 Memory:ce000000-ce011100

[root@lnx213-42 ~]#
[root@lnx213-42 ~]# cat /etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
Kernel \r on an \m
[root@lnx213-42 ~]# uname -a
Linux lnx213-42 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT 2006 i686 i686
i386 GNU/Linux
[root@lnx213-42 ~]#

Regards,
Prabhu H
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