Configuring APA
Long time since my last post, Christmas you know ;-) BTW Merry Christmas and Happy New Year to all of you.
During this weeks I’ve been configuring APA failover groups in some of my blades and I thought It would be interesting to post how I did it. There are two ways to configure APA in HP-UX 11.31, through the SMH and with the nwmgr command. The screenshots are in Spanish since this is how the SMH of my servers are configured.
SMH
Log into the server SMH and go to Tools -> Network Interface Configuration -> Auto Port Aggregation.
Now click on Create Failover Group and select the interfaces to add, you can also configure the advanced parameters for the group, when you’re done click OK to finish the operation.
Now in the main page of APA the new group will be shown instead of the LAN interfaces the are part of the group:
And this is it, the new APA Failover Group is configured and completely transparent to the users. From this point you can show the information about the newly created APA interface.
nwmgr command
The nwmgr command has replaced the old lanscan, lanadmin and linkloop commands in 11.31. I have to say that I prefer this way instead of the SMH one to do any APA or LAN related tasks. SMH require TCP/2301 and TCP/2381 ports to be open and accessible and this is not always possible mainly because security policies but to use nwmgr you only need access to the server through SSH.
To begin show the current configuration:
[root@ignite] ~ # nwmgr -g
Name/ Interface Station Sub- Interface Related
ClassInstance State Address system Type Interface
============== ========= ============== ======== ============== =========
lan2 DOWN 0x001E0B45E09A igelan 1000Base-SX
lan0 UP 0x001E0B45E09C igelan 1000Base-SX lan900
lan1 UP 0x001E0B45E09D igelan 1000Base-SX lan900
lan3 DOWN 0x001E0B45E09B igelan 1000Base-SX
lan900 UP 0x001E0B45E09C hp_apa hp_apa
lan901 DOWN 0x000000000000 hp_apa hp_apa
lan902 DOWN 0x000000000000 hp_apa hp_apa
lan903 DOWN 0x000000000000 hp_apa hp_apa
lan904 DOWN 0x000000000000 hp_apa hp_apa
[root@ignite] ~ # nwmgr -g -S apa
Class Mode Load Speed- Membership
Instance Balancing Duplex
======== =========== ========= ==================== ===========================
lan900 Not_Enabled LB_MAC 0 Mbps -
lan901 Not_Enabled LB_MAC 0 Mbps -
lan902 Not_Enabled LB_MAC 0 Mbps -
lan903 Not_Enabled LB_MAC 0 Mbps -
lan904 Not_Enabled LB_MAC 0 Mbps -
[root@ignite] ~ #
Now proceed with the creation of the new failover group:
[root@ignite] ~ # nwmgr -a -S apa -c lan900 -A links=0,1 -A mode=LAN_MONITOR
Addition of links 0, 1 to lan900 succeeded.
[root@ignite] ~ # nwmgr -s -S apa -A all --saved --from cu
[root@ignite] ~ #
Specific advanced parameters can also be set, in the example I used the parameters rapid_arp_count and poll_interval:
[root@ignite] / # nwmgr -a -S apa -c lan901 -A links=2,1,3 -A mode=LAN_MONITOR -A rapid_arp_count=5 -A poll_interval=0,500000
Addition of links 0, 1 to lan900 succeeded.
[root@ignite] / # nwmgr -s -S apa -A all --saved --from cu
[root@ignite] / #
To show the new config:
[root@ignite] ~ # nwmgr -g
Name/ Interface Station Sub- Interface Related
ClassInstance State Address system Type Interface
============== ========= ============== ======== ============== =========
lan2 DOWN 0x001E0B45E09A igelan 1000Base-SX
lan0 UP 0x001E0B45E09C igelan 1000Base-SX lan900
lan1 UP 0x001E0B45E09D igelan 1000Base-SX lan900
lan3 DOWN 0x001E0B45E09B igelan 1000Base-SX
lan900 UP 0x001E0B45E09C hp_apa hp_apa
lan901 DOWN 0x000000000000 hp_apa hp_apa
lan902 DOWN 0x000000000000 hp_apa hp_apa
lan903 DOWN 0x000000000000 hp_apa hp_apa
lan904 DOWN 0x000000000000 hp_apa hp_apa
[root@ignite] ~ # netstat -ni
Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll
lo0 32808 127.0.0.0 127.0.0.1 10100925 0 10100956 0 0
lan900 1500 10.31.4.0 10.31.4.37 256 0 92 0 0
[root@ignite] ~ #
[root@ignite] ~ # nwmgr -g -S apa
Class Mode Load Speed- Membership
Instance Balancing Duplex
======== =========== ========= ==================== ===========================
lan900 LAN_MONITOR LB_HS 1 Gbps Full Duplex 0,1
lan901 Not_Enabled LB_MAC 0 Mbps -
lan902 Not_Enabled LB_MAC 0 Mbps -
lan903 Not_Enabled LB_MAC 0 Mbps -
lan904 Not_Enabled LB_MAC 0 Mbps -
[root@ignite] ~ #
[root@ignite] ~ # nwmgr -S apa -I 900
Class Parent APA Mode Load Membership
Instance PPA State Balancing
======== ====== =========== =========== ========= =============================
lan900 - Up LAN_MONITOR LB_HS 0,1
[root@ignite] ~ #
[root@ignite] ~ # nwmgr -g -S apa -I 900 -v
lan900 current values:
Speed = 1 Gbps Full Duplex
MTU = 1500
Virtual Maximum Transmission Unit = 0
MAC Address = 0x001e0b45e09c
Network Management ID = 6
Features = Linkagg Interface
IPV4 Recv CKO
IPV4 Send CKO
VLAN Support
VLAN Tag Offload
64Bit MIB Support
Load Distribution Algorithm = LB_HS
Mode = LAN_MONITOR
Parent PPA = -
APA State = Up
Membership = 0,1
Active Port(s) = 0
Ready Port(s) = 1
Not Ready Port(s) = -
Connected Port(s) = 1
Polling Interval = 10000000
Dead Count = 3
Rapid ARP = on
Rapid ARP Interval = 1.0 second(s)
Rapid ARP Count = 10
Failover Policy = PRIORITY_BASED
[root@ignite] ~ # ifconfig lan900
lan900: flags=1843<UP,BROADCAST,RUNNING,MULTICAST,CKO>
inet 10.31.4.37 netmask ffffff00 broadcast 10.31.4.255
[root@ignite] ~ #
If you want to delete an existent failover group:
[root@ignite] ~ # nwmgr -d -S apa -A links=all -c lan900 --force
Deletion of links all ports from lan900 succeeded.
[root@ignite] ~ # nwmgr -s -S apa -A all --saved --from cu
[root@ignite] ~ #
Or if you just want to remove a interface from the group:
[root@ignite] ~ # nwmgr -d -S apa -c lan901 -A links=1
And we are finished, I still have 11.23 systems and I want APA for them too so I will post how to do it with the lanadmin command.
See you next time.
Juanma.
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