IPv6 address disappeared from interface

["Prabhu Hariharan" <prabhuh@xxxxxxxxx>]

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 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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