Last post we have gone through some basic of Network administration, In this post we will be targeting some Advance features of Network administrations as like Link Aggregation, IPMP (IP Multipathing) features. Before going in deep we can see some basic concept of networking.
Basic Concepts :
- Bandwidth : Bandwidth is bit rate for sending and receiving data over the network.
- Failover : Capability to have a backup component for the one becomes unavailable.
- Load balancing : Distribution of workload to achieve best utilization.
Before starting the aggregation, we have to make it sure physical interface should be have same mode as full-duplex and same speed. By executing dladm show-link
Creating aggregartion link with using two interface net1 and net2
root@unixrock:~# dladm create-aggr -l net1 -l net2 aggr0 root@unixrock:~# root@unixrock:~# dladm show-link LINK CLASS MTU STATE OVER net0 phys 1500 up -- net1 phys 1500 up -- net3 phys 1500 up -- net2 phys 1500 up -- aggr0 aggr 1500 up net1 net2 root@unixrock:~# root@unixrock:~# dladm show-aggr LINK MODE POLICY ADDRPOLICY LACPACTIVITY LACPTIMER aggr0 trunk L4 auto off short root@unixrock:~#To Add a another Link (net3) to an Aggregation (aggr0)
root@unixrock:~# dladm add-aggr -l net3 aggr0 root@unixrock:~# dladm show-link LINK CLASS MTU STATE OVER net0 phys 1500 up -- net1 phys 1500 up -- net3 phys 1500 up -- net2 phys 1500 up -- aggr0 aggr 1500 up net1 net2 net3 root@unixrock:~#To assigning IP to the aggregation link
root@unixrock:~# ipadm create-addr -T static -a 192.168.113.142 aggr0 ipadm: cannot create address: No such interface root@unixrock:~#
Opps......getting error says that No such interface, that means we have to probe the interface first
root@unixrock:~# ipadm create-ip aggr0 root@unixrock:~# ipadm create-addr -T static -a 192.168.113.142 aggr0 aggr0/v4 root@unixrock:~#Yes...we have done the aggr0 aggregation link with using net1 net2 net3 physical link and assigned Ip address too.
root@unixrock:~# dladm show-link LINK CLASS MTU STATE OVER net0 phys 1500 up -- net1 phys 1500 up -- net3 phys 1500 up -- net2 phys 1500 up -- aggr0 aggr 1500 up net1 net2 net3 root@unixrock:~# root@unixrock:~# ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 net0/v4test static ok 192.168.113.139/24 aggr0/v4 static ok 192.168.113.142/24 lo0/v6 static ok ::1/128 root@unixrock:~#To delete/remove the link from an Aggregation link
root@unixrock:~# dladm show-link LINK CLASS MTU STATE OVER net0 phys 1500 up -- net1 phys 1500 up -- net3 phys 1500 up -- net2 phys 1500 up -- aggr0 aggr 1500 up net1 net2 net3 root@unixrock:~# dladm remove-aggr -l net3 aggr0 root@unixrock:~# root@unixrock:~# dladm show-link LINK CLASS MTU STATE OVER net0 phys 1500 up -- net1 phys 1500 up -- net3 phys 1500 unknown -- net2 phys 1500 up -- aggr0 aggr 1500 up net1 net2 root@unixrock:~#
IP Multipathing (IPMP)
IP Multipathing (IPMP) provides physical interface failure detection, Load balancing of packets, and transparent redundancy features. IPMP which makes possible to assign the IP address to a group of network interface. if any one of the interface fails, the group can bind the IP address to another interface from the same IPMP group as transparent redundancy. IPMP can be configured for both IPv4 and IPv6. IPMP group will come up with ACTIVE - ACTIVE and ACTIVE- STANDBY
Advantage of IPMP
- Fault tolerance
- Spreading the load
- Increased bandwidth
- Transparent redundancy
- Works even if its different switches
Components of IPMP
- IPMP daemon : in.mapthd
- IPMP service : svc:/network/ipmp:default
- IPMP conf file : /etc/default/mpathd
- IPMP Commands : ipadm, ipmpstat
Let we start Creating an IPMP group and Adding IP address to an IPMP group and Deleting and disable the IPMP group.
Creating ipmp0 group with using "ipadm create-ipmp" command
ERROR : ipadm: cannot delete IPMP interface ipmp0: IPMP group is not empty
ERROR: ipadm: persistent operation not supported for enable-if
Creating ipmp0 group with using "ipadm create-ipmp" command
root@unixrock:/# root@unixrock:/# ipadm create-ip net1 root@unixrock:/# ipadm create-ip net2 root@unixrock:/# ipadm create-ip net3 root@unixrock:/# ipadm create-ipmp ipmp0 root@unixrock:/# ipadm add-ipmp -i net1 -i net3 ipmp0 root@unixrock:/# ipmpstat -g GROUP GROUPNAME STATE FDT INTERFACES ipmp0 ipmp0 ok -- net3 net1 root@unixrock:/#Assigning IP to that ipmp0 group
root@unixrock:~# ipadm create-addr -T static -a 192.168.113.145 ipmp0/v4addr1 root@unixrock:~# ipadm create-addr -T static -a 192.168.113.146 ipmp0/v4addr2 root@unixrock:~# ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 net0/v4test static ok 192.168.113.139/24 ipmp0/v4addr1 static ok 192.168.113.145/24 ipmp0/v4addr2 static ok 192.168.113.146/24 lo0/v6 static ok ::1/128 root@unixrock:~#Remove the interface from IPMP group
root@unixrock:~# ipmpstat -g GROUP GROUPNAME STATE FDT INTERFACES ipmp0 ipmp0 ok -- net1 net3 root@unixrock:~# root@unixrock:~# ipadm remove-ipmp -i net1 ipmp0 root@unixrock:~# ipmpstat -g GROUP GROUPNAME STATE FDT INTERFACES ipmp0 ipmp0 ok -- net3 root@unixrock:~#Adding one Interface to the IPMP group
root@unixrock:~# ipmpstat -g GROUP GROUPNAME STATE FDT INTERFACES ipmp0 ipmp0 ok -- net3 root@unixrock:~# ipadm add-ipmp -i net2 ipmp0 root@unixrock:~# ipmpstat -g GROUP GROUPNAME STATE FDT INTERFACES ipmp0 ipmp0 ok -- net2 net3 root@unixrock:~#To disable an IPMP group
root@unixrock:~# ipadm disable-if -t ipmp0 root@unixrock:~# ipmpstat -g root@unixrock:~# ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 net0/v4test static ok 192.168.113.139/24 lo0/v6 static ok ::1/128 ipmp0/v4addr1 static disabled 192.168.113.145 ipmp0/v4addr2 static disabled 192.168.113.146 root@unixrock:~#To delete the IPMP group
root@unixrock:~# ipadm delete-ipmp ipmp0 root@unixrock:~# ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 net0/v4test static ok 192.168.113.139/24 lo0/v6 static ok ::1/128 root@unixrock:~#Encountered some issues and fixes
ERROR : ipadm: cannot delete IPMP interface ipmp0: IPMP group is not empty
root@unixrock:~# ipadm delete-ipmp ipmp0 ipadm: cannot delete IPMP interface ipmp0: IPMP group is not empty root@unixrock:~# root@unixrock:~# ipmpstat -g GROUP GROUPNAME STATE FDT INTERFACES ipmp0 ipmp0 ok -- net1 root@unixrock:~# ipmpstat -i INTERFACE ACTIVE GROUP FLAGS LINK PROBE STATE net1 yes ipmp0 --mbM-- up disabled ok root@unixrock:~# ipadm delete-ip net1 root@unixrock:~# ipadm delete-ipmp ipmp0 root@unixrock:~# ipadm show-if IFNAME CLASS STATE ACTIVE OVER lo0 loopback ok yes -- net0 ip ok yes -- net3 ip disabled no -- net2 ip disabled no -- root@unixrock:~#ERROR: ipadm: cannot create interface net2: Operation not supported on disabled object
ERROR: ipadm: persistent operation not supported for enable-if
root@unixrock:~# ipadm create-ip net2 ipadm: cannot create interface net2: Operation not supported on disabled object root@unixrock:~# root@unixrock:~# ipadm show-if IFNAME CLASS STATE ACTIVE OVER lo0 loopback ok yes -- net0 ip ok yes -- net3 ip disabled no -- net2 ip disabled no -- root@unixrock:~# root@unixrock:~# ipadm enable-if net3 ipadm: persistent operation not supported for enable-if root@unixrock:~# root@unixrock:~# ipadm enable-if -t net3 root@unixrock:~# ipadm enable-if -t net2 root@unixrock:~# root@unixrock:~# ipadm show-if IFNAME CLASS STATE ACTIVE OVER lo0 loopback ok yes -- net0 ip ok yes -- net2 ip down no -- net3 ip down no -- root@unixrock:~#Thanks for reading this post. Please leave your valuable comments and queries, I will get back to you at earliest possible.
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