| SIOS has migrated to the use of the ip command and away from the ifconfig command. Because of this change, customers with external scripts are advised to make a similar change. Instead of issuing the ifconfig command and parsing the output looking for a specific interface, scripts should instead use “ip -o addr show“ and parse the output looking for lines that contain the words “inet” and “secondary”.
# ip -o addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN \ link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 1: lo inet 127.0.0.1/8 scope host lo 1: lo inet6 ::1/128 scope host \ valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 \ link/ether d2:05:de:4f:a2:e6 brd ff:ff:ff:ff:ff:ff 2: eth0 inet 172.17.100.77/22 brd 172.17.103.255 scope global eth0 2: eth0 inet 172.17.100.79/22 scope global secondary eth0 2: eth0 inet 172.17.100.80/22 scope global secondary eth0 2: eth0 inet6 2001:5c0:110e:3364::1:2/64 scope global \ valid_lft forever preferred_lft forever 2: eth0 inet6 2001:5c0:110e:3300:d005:deff:fe4f:a2e6/64 scope global dynamic \ valid_lft 86393sec preferred_lft 14393sec 2: eth0 inet6 fe80::d005:deff:fe4f:a2e6/64 scope link \ valid_lft forever preferred_lft forever
So for the above output from the ip command, the following lines contain virtual IP addresses for the eth0 interface:
2: eth0 inet 172.17.100.79/22 scope global secondary eth0 2: eth0 inet 172.17.100.80/22 scope global secondary eth0
‘IPV6_AUTOCONF = No’ for /etc/sysconfig/network-scripts/ifcfg-<nicName> is not being honored on reboot or boot
On boot, a stateless, auto-configured IPv6 address is assigned to the network interface. If a comm path is created with a stateless IPv6 address of an interface that has IPV6_AUTOCONF=No set, the address will be removed if any system resources manage the interface, e.g. ifdown <nicName>;ifup <nicName>.
Comm path using auto-configured IPv6 addresses did not recover and remained dead after rebooting primary server because IPV6_AUTOCONF was set to No.
Solution: Use Static IPv6 addresses only. The use of auto-configured IPv6 addresses could cause a comm loss after a reboot, a NIC change, etc.
While IPv6 auto-configured addresses may be used for comm path creation, the system administrator should be aware of the following conditions:
IP: Modify Source Address Setting for IPv6 doesn’t set source address
When attempting to set the source address for an IPv6 IP resource, it will report success when nothing was changed.
Workaround: Currently no workaround is available. This will be addressed in a future release.
IP: Invalid IPv6 addressing allowed in IP resource creation
Entering IPv6 addresses of the format 2001:5c0:110e:3368:000000:000000001:61:14 is accepted when the octets contain more than four characters.
Workaround: Enter correctly formatted IPv6 addresses.
IPv6 resource reported as ISP when address assigned to bonded NIC but in ‘tentative’ state
IPv6 protected resources in LifeKeeper will incorrectly be identified as ‘In Service Protected’ (ISP) on SLES systems where the IPv6 resource is on a bonded interface, a mode other than ‘active-backup’ (1) and Linux kernel 2.6.21 or lower. The IPv6 bonded link will remain in the ‘tentative’ state with the address unresolvable.
Workaround: Set the bonded interface mode to ‘active-backup’ (1) or operate with an updated kernel which will set the link state from ‘tentative’ to ‘valid’ for modes other than ‘active-backup’ (1).