OpenSolaris

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Bug ID 6246564
Synopsis if_mpadm -r <ifname> doesn't bring up IPv6 link-local data address
State 10-Fix Delivered (Fix available in build)
Category:Subcategory network:ipmp
Keywords clearview
Responsible Engineer Peter Memishian
Reported Against s10_73 , solaris_10
Duplicate Of
Introduced In solaris_9
Commit to Fix snv_107
Fixed In snv_107
Release Fixed solaris_nevada(snv_107)
Related Bugs 6783149 , 6202421
Submit Date 28-March-2005
Last Update Date 28-January-2009
Description 
When IPMP fails over to another interface, it brings down the IPv6 link local address. When IPMP fails back, it doesn't bring the IPv6 link local address up.

Test case:
----------
[root@v4u-60l-blr03]:/space/katla#ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000 
hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 129.158.233.106 netmask ffffff00 broadcast 129.158.233.255
        ether 8:0:20:cf:32:80 
qfe0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
        inet 192.158.20.10 netmask ffffff00 broadcast 192.158.20.255
        groupname test1
        ether 8:0:20:8e:e1:8c 
qfe0:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 3
        inet 192.158.20.11 netmask ffffff00 broadcast 192.158.20.255
qfe1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 4
        inet 192.158.20.20 netmask ffffff00 broadcast 192.158.20.255
        groupname test1
        ether 8:0:20:8e:e1:8d 
qfe1:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 4
        inet 192.158.20.21 netmask ffffff00 broadcast 192.158.20.255
qfe0: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 3
        inet6 fe80::a00:20ff:fe8e:e18c/10 
        groupname test1
        ether 8:0:20:8e:e1:8c 
qfe0:1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 3
        inet6 20a1:5a0:826:804::1/64 
qfe1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 fe80::a00:20ff:fe8e:e18d/10 
        groupname test1
        ether 8:0:20:8e:e1:8d 
qfe1:1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 20a1:5a0:826:804::2/64 

[root@v4u-60l-blr03]:/space/katla#if_mpadm -d qfe0
Mar 28 11:26:04 v4u-60l-blr03 in.mpathd[632]: Successfully failed over from NIC qfe0 to NIC qfe1
[root@v4u-60l-blr03]:/space/katla#ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000 
hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 129.158.233.106 netmask ffffff00 broadcast 129.158.233.255
        ether 8:0:20:cf:32:80 
qfe0: flags=89000842<BROADCAST,RUNNING,MULTICAST,IPv4,NOFAILOVER,OFFLINE> mtu 0 index 3
        inet 0.0.0.0 netmask 0 
        groupname test1
        ether 8:0:20:8e:e1:8c 
qfe0:1: flags=89040842<BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER,OFFLINE> mtu 1500 index 3
        inet 192.158.20.11 netmask ffffff00 broadcast 192.158.20.255
qfe1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 4
        inet 192.158.20.20 netmask ffffff00 broadcast 192.158.20.255
        groupname test1
        ether 8:0:20:8e:e1:8d 
qfe1:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 4
        inet 192.158.20.21 netmask ffffff00 broadcast 192.158.20.255
qfe1:2: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 4
        inet 192.158.20.10 netmask ffffff00 broadcast 192.158.20.255
qfe0: flags=82000840<RUNNING,MULTICAST,IPv6,OFFLINE> mtu 1500 index 3
        inet6 fe80::a00:20ff:fe8e:e18c/10 
        groupname test1
        ether 8:0:20:8e:e1:8c 
qfe1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 fe80::a00:20ff:fe8e:e18d/10 
        groupname test1
        ether 8:0:20:8e:e1:8d 
qfe1:1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 20a1:5a0:826:804::2/64 
qfe1:2: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 20a1:5a0:826:804::1/64 

[root@v4u-60l-blr03]:/space/katla#if_mpadm -r qfe0
Mar 28 11:26:19 v4u-60l-blr03 in.mpathd[632]: Successfully failed back to NIC qfe0
[root@v4u-60l-blr03]:/space/katla#ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000 
hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 129.158.233.106 netmask ffffff00 broadcast 129.158.233.255
        ether 8:0:20:cf:32:80 
qfe0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
        inet 192.158.20.10 netmask ffffff00 broadcast 192.158.20.255
        groupname test1
        ether 8:0:20:8e:e1:8c 
qfe0:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 3
        inet 192.158.20.11 netmask ffffff00 broadcast 192.158.20.255
qfe1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 4
        inet 192.158.20.20 netmask ffffff00 broadcast 192.158.20.255
        groupname test1
        ether 8:0:20:8e:e1:8d 
qfe1:1: flags=9040843<UP,BROADCAST,RUNNING,MULTICAST,DEPRECATED,IPv4,NOFAILOVER> mtu 1500 index 4
        inet 192.158.20.21 netmask ffffff00 broadcast 192.158.20.255
qfe0: flags=2000840<RUNNING,MULTICAST,IPv6> mtu 1500 index 3   <<< NOT UP <<<
        inet6 fe80::a00:20ff:fe8e:e18c/10 
        groupname test1
        ether 8:0:20:8e:e1:8c 
qfe0:1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 3
        inet6 20a1:5a0:826:804::1/64 
qfe1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 fe80::a00:20ff:fe8e:e18d/10 
        groupname test1
        ether 8:0:20:8e:e1:8d 
qfe1:1: flags=2000841<UP,RUNNING,MULTICAST,IPv6> mtu 1500 index 4
        inet6 20a1:5a0:826:804::2/64 

 xxxxx@xxxxx.com 2005-03-28 06:17:08 GMT
If IFF_NOFAILOVER is set to the link local address, this issue will not happen.
And also, it will not happen in normal link failover/failback.

This happen only with the if_mpadm.
if_mpadm offlines (sets IFF_OFFLINE flags) and clears the IFF_UP flags to all the interfaces.

So, actual synopsis should be "if_mpadm -r <interface> doesn't bring up IPv6 link local address, if IFF_NOFAILOVER is not set to the link local interface".
Updated synopsis to address Ramesh's observation above.
Work Around 
N/A
Comments 
N/A