Technical Tip

QUESTION

How can I set up and configure a network aggregation under Solaris 10?

ANSWER
An aggregation is similar to an IPMP link created for failover, but has other advantages:-
  • An aggregation is treated as one device for configuration and management, and uses only one IP address.
  • In-bound as well as outbound load spreading is provided, so extra bandwidth is available.
  • Automatic failover is provided, to the remaining working links in the aggregation.
  • Policies can be applied to the traffic flows.
  • Parallel aggregations between servers can be created, without going through a switch.
To show the available network interfaces:-
# dladmin  show-link
eri0            type: legacy    mtu: 1500       device: eri0
qfe0            type: legacy    mtu: 1500       device: qfe0
qfe1            type: legacy    mtu: 1500       device: qfe1
qfe2            type: legacy    mtu: 1500       device: qfe2
qfe3            type: legacy    mtu: 1500       device: qfe3

Early versions of Solaris 10 do not have this facility - you would need to download the Sun Trunking software to get it.
 
There are conditions to consider:-
  • If you need to run an aggregation through a switch, that switch must support aggregation technology.
  • An interface that has been plumbed cannot become a member of an aggregation.
  • Interfaces must be of the GLDv3 type: xge, e1000g, and bge.
  • NOTE: Later releases of Solaris 10 will support aggregations on what are now considered legacy devices such as eri. qfe and hme.
  • All interfaces in the aggregation must run at the same speed and in full duplex mode.
To set up an aggregation using dladm, the basics steps are:-
# dladm  create -aggr  -d  bge0  -d  bge1  1
Create an aggregation number 1 from interfaces bge0 and bge1.

# ifconfig  aggr1   plumb  192.168.200.98  up
Brings the aggregation interface up.

# dladm   show-aggr
key: 1 (0x0001) policy: L4      address: 0:3:ba:7:84:5e (auto)

device   address           speed         duplex  link    state
bge0     0:3:ba:7:84:5e    1000  Mbps    full    up      attached
bge1     0:3:ba:7:84:5e   1000  Mbps    full    up      attached
 
To add another interface to the aggregation:-
# dladm  add-aggr  -d  bge2  -d  bge3  1
# dladm  show-aggr  1
key: 1 (0x0001) policy: L4      address:0:3:ba:7:84:5e (auto)
           device       address                 speed           duplex  link    state
           bge0      0:14:4f:1:c8:b0   1000  Mbps    full    up      attached
           bge1      0:14:4f:1:c8:b3   1000  Mbps    full    up      attached
           bge2      0:14:4f:1:c8:b1   1000  Mbps    full    up      attached
           bge3      0:14:4f:1:c8:b2   1000  Mbps    full    up      attached

To remove a device from the aggregation:-
# dladm  remove-aggr  -d  bge0  1
# dladm  show-aggr  1
key: 1 (0x0001) policy: L4      address: 0:3:ba:7:84:5e (auto)
           device       address                 speed           duplex  link    state
           bge1      0:14:4f:1:c8:b3   1000  Mbps    full    up      attached
           bge2      0:14:4f:1:c8:b1   1000  Mbps    full    up      attached
           bge3      0:14:4f:1:c8:b2   1000  Mbps    full    up      attached
 
 
It is possible to set policies for aggregations, such as whether to use LACP protocol or not.
Here is an example which sets LACP mode to active, and the timer interval to short.
# dladm   modify-aggr  -l   active  -t  short  1

The default outbound load spreading is based on ports, but this can also be changed - see the dladm man page for full details.
Aggregations can be assigned to zones using IP instances (Update 4 onwards) - see zonecfg for details.
dladm can assign an aggregation temporarily to a zone, until the next reboot:-
#  dladm  set-linkprop   -t  -p  zone=apache  aggr1
The -t option must be used.
Use zonecfg to assign aggr1 permanently to the apache zone.

dladm also provides functions to display statistics, and not just for aggregations:-
# dladm  show-dev  -s  eri0
                ipackets  rbytes         ierrors opackets        obytes      oerrors
eri0            806693    122733634   0       808629    336565292   0


# dladm  show-aggr  -s
key: 1  ipackets  rbytes      opackets   obytes          %ipkts %opkts
           Total        158030    31173663    12        504
           qfe1 132878    26014941    12        504             84.1    100.0
           qfe2 8818      1818890     0         0               5.6     0.0
           qfe3 8174      1671697     0         0               5.2     0.0
           qfe0 8160      1668135     0         0               5.2     0.0


We hope this has been useful, see below for additional notes
Mick Hosegood - First Alternative.

NOTES

  • All this is covered on the Solaris 10 Network Administration course!

  • QUESTION

    I want to run a recent version of Adobe Reader (acroread) under Solaris 10 x86.

    ANSWER

    You can now run Adobe Reader version 7 under Solaris 10 X86; here's how.

First Alternative course tutors can answer questions like this ... and are happy to do so. Look around our site for relevant courses in Linux -Unix - Perl - Solaris - FrameMaker

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