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Continuous Access - setting parameters in san

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inex
Super Advisor

Continuous Access - setting parameters in san

Hi,

Aptpolicy should be set to 1, but I see in the manual that DLS should disabled. Anyone knows how critical this patameter is? Can it be changed online?
Is it necessary to lock the speed on the switchports?
I was told that best practice for CA was to stay away from autonegotiate.

-inex

6 REPLIES
IBaltay
Honored Contributor
Solution

Re: Continuous Access - setting parameters in san

Hi,
APTPOLICY=1 the switch must be disabled

DLS/IOD can be set without diabling the switch

DLS (dynamic load sharing) - should be disabled

DLSSHOW
if DLS is set then
DLSRESET

IOD (in order delivery) - should be enabled

IODSHOW
if IOD not set then
IODSET

it is allways best to set manualy the port speed not allowing the possible speed negotiation in place...
the pain is one part of the reality
IBaltay
Honored Contributor

Re: Continuous Access - setting parameters in san

more details on APTPOLICY/IOD/DLS can be found in FOS admin guides, e.g.:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01482603/c01482603.pdf?jumpid=reg_R1002_USEN

the pain is one part of the reality
inex
Super Advisor

Re: Continuous Access - setting parameters in san

Hello again
Many thanks for answer.
Have you seen any HP document recommending that you lock the port speed?

-inex
IBaltay
Honored Contributor

Re: Continuous Access - setting parameters in san

all CA related SAN info should be in SAN design reference guide -HP Continuous access EVA heterogeneous SAN configuration rules section:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00403562/c00403562.pdf?jumpid=reg_R1002_USEN


the pain is one part of the reality
inex
Super Advisor

Re: Continuous Access - setting parameters in san

Can't see any very clear recommendation about locking the port speed.

-inex
IBaltay
Honored Contributor

Re: Continuous Access - setting parameters in san

the typical CA remote replication setup with arrays on local and remote sites are two fabrics connected by 2 ISL (interstate links) in each fabric.
The rules and distances should be described in the mentioned SAN design reference guide - chapter 8 - SAN fabric connectivity and switch interoperability rules
the pain is one part of the reality