With the introduction of Solaris 11 the network configuration are managed by network configuration policies (NCPs), there are two policies which can be implemented Fixed which are statically implemented and reactive which are dynamically implemented. The network configuration commands that are used are ipadm and dladm which offers lot of new feature like Link aggregation, vlan tagging, ip tunneling, bridging and IPMP, also the setps involved in configuring them are less and which makes it less burden on system administrators.
Just wanted to touch base on configuring few of these feature.
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IPMP
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IPMP (IP multipathing) is a grouping of the network interface into single logical interface. The IPMP can be configured in two types of failure detection Link based (layer 2) & probe based (layer 3)
The IPMP feature enable us to achieve the distribution of data address (active-active) & transparent access failover (active-passive). These feature enable us for achieve high availability on our network interface when there is a failure or failover the interface when we are doing any maintenance.
A. Link-Based IPMP
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Active/Active
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1. Check if the network automatic configuration is disbaled and the default is enabled.
root@suntest:~# netadm list
TYPE PROFILE STATE
ncp Automatic disabled
ncp DefaultFixed online
2. list all the physical interfaces available.
root@suntest:~# dladm show-phys
LINK MEDIA STATE SPEED DUPLEX DEVICE
net1 Ethernet up 1000 full e1000g1
net0 Ethernet up 1000 full e1000g0
3. Add the ip in the /etc/hosts so that it remains persistent across the reboot
root@suntest:~# echo "192.168.75.25 testipmp0" >> /etc/hosts
4. Create the ipmp group & add the interface to the group
root@suntest:~# ipadm create-ipmp ipmp0
root@suntest:~# ipadm create-ip net0
root@suntest:~# ipadm create-ip net1
root@suntest:~# ipadm add-ipmp -i net0 -i net1 ipmp0
5. Assign the ip address for the ipmp interface which is configured.
root@suntest:~# ipadm create-addr -T static -a 192.168.75.21/24 ipmp0/v4
6. Review the configurtion.
root@suntest:~# ipmpstat -g
GROUP GROUPNAME STATE FDT INTERFACES
ipmp0 ipmp0 ok -- net1 net0
root@suntest:~# ipmpstat -a
ADDRESS STATE GROUP INBOUND OUTBOUND
suntest up ipmp0 net1 net1 net0
root@suntest:~# ipmpstat -i
INTERFACE ACTIVE GROUP FLAGS LINK PROBE STATE
net0 yes ipmp0 ------- up disabled ok
net1 yes ipmp0 --mbM-- up disabled ok
As you can see both the network interfaces are active here and part of ipmp group
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Active/Passive
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For configuring the Active/Passive link based ipmp group perform the same step from 1 to 4 and then
5. Make one of the interface as standby from the ipmp group and then assign the ip
root@suntest:~# ipadm set-ifprop -p standby=on -m ip net1
root@suntest:~# ipadm create-addr -T static -a 192.168.75.21/24 ipmp0/v4
6. Review the configurtion.
root@suntest:~# ipmpstat -g
GROUP GROUPNAME STATE FDT INTERFACES
ipmp0 ipmp0 ok -- net0 (net1)
root@suntest:~# ipmpstat -a
ADDRESS STATE GROUP INBOUND OUTBOUND
suntest up ipmp0 net0 net0
root@suntest:~# ipmpstat -in
INTERFACE ACTIVE GROUP FLAGS LINK PROBE STATE
net1 no ipmp0 is----- up disabled ok
net0 yes ipmp0 --mbM-- up disabled ok
B. Probe-base IPMP
The probe-based IPMP that is supported in Solaris 11 are two kind with Test ip on interfaces & Transitive probing.
*** Configuring Probe-based with Test addresses (Active/Active) ***
1. Confirm if the transitive probling is not started, which by default is set to test address
root@suntest:~# svccfg -s svc:/network/ipmp listprop config/transitive-probing
config/transitive-probing boolean false
2. Create the ipmp group and add the interface
root@suntest:~# ipadm create-ipmp ipmp0
root@suntest:~# ipadm create-ip net0
root@suntest:~# ipadm create-ip net1
root@suntest:~# ipadm add-ipmp -i net0 -i net1 ipmp0
3. Assign the ip for the ipmp interface and test address for the physical interfaces/
root@suntest:~# ipadm create-addr -T static -a 192.168.75.21/24 ipmp0/v4
root@suntest:~# ipadm create-addr -T static -a 192.168.75.2/24 net0/test1
root@suntest:~# ipadm create-addr -T static -a 192.168.75.3/24 net1/test2
4. Add a target to which the interfaces will probe.
root@suntest:~# route add default 192.168.75.1
5. Review if everything is working as you wanted.
root@suntest:~# ipmpstat -an
ADDRESS STATE GROUP INBOUND OUTBOUND
192.168.75.21 up ipmp0 net0 net1 net0
root@suntest:~# ipmpstat -tn
INTERFACE MODE TESTADDR TARGETS
net1 routes 192.168.75.3 192.168.75.1
net0 routes 192.168.75.2 192.168.75.1
root@suntest:~# ipmpstat -in
INTERFACE ACTIVE GROUP FLAGS LINK PROBE STATE
net1 yes ipmp0 ------- up ok ok
net0 yes ipmp0 --mbM-- up ok ok
For configuring Probe-based with Test adresses (Active/passive) just do one step after 3
root@suntest:~# ipadm set-ifprop -p standby=on -m ip net1
and the difference you will see as below
root@suntest:~# ipmpstat -in
INTERFACE ACTIVE GROUP FLAGS LINK PROBE STATE
net1 no ipmp0 is----- up ok ok
net0 yes ipmp0 --mbM-- up ok ok
root@suntest:~# ipmpstat -an
ADDRESS STATE GROUP INBOUND OUTBOUND
192.168.75.21 up ipmp0 net0 net0
*** Configuring Transtive probing using Active/Active method ***
1. Enable the transitive probing
root@suntest:~# svccfg -s svc:/network/ipmp setprop config/transitive-probing=true
root@suntest:~# svcadm refresh ipmp
2. Create the ipmp group and add the interface
root@suntest:~# ipadm create-ipmp ipmp0
root@suntest:~# ipadm create-ip net0
root@suntest:~# ipadm create-ip net1
root@suntest:~# ipadm add-ipmp -i net0 -i net1 ipmp0
3. Assign the ip for the ipmp interface
root@suntest:~# ipadm create-addr -T static -a 192.168.75.21/24 ipmp0/v4
4. Review the configuration
root@sunclu1:~# ipmpstat -tn
INTERFACE MODE TESTADDR TARGETS
net1 transitive <net1> <net0>
net0 routes 192.168.75.21 192.168.75.1
root@sunclu1:~# ipmpstat -pn
TIME INTERFACE PROBE NETRTT RTT RTTAVG TARGET
0.77s net1 t247 1.92ms 1.93ms 1.70ms <net0>
0.77s net0 i244 0.86ms 1.15ms 1.09ms 192.168.75.1
1.88s net1 t248 1.68ms 1.69ms 1.70ms <net0>
1.88s net0 i245 0.73ms 1.21ms 1.11ms 192.168.75.1
Hope this document was helpful...
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