12-21-2018 01:06 AM
I have a routed backbone with DCX's as edge switches.
Is there any impact on creating all zones as LSAN zones even if the wwn is only accessing local resources?
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12-21-2018 01:16 AM
Tnx for the fast reply
It is really just to zone the same way for all zones independ of it is a local or remote zone.
Is there a performance impact - on zoning all zones as lsan zones?
12-21-2018 01:31 AM
as per my experience....
feew years ago by a large Electricity Client, during a Datacenter Migration / Consolidations, and due some restriction, I've create ONE LSAN on Single Port old Brocade 7500 4Gb platforms connected to DCX.
Server was phisically located o Site_B, DCX was located on Site_A both connected via WDM
whe move / snap-shoted the OS ( AIX ) from B to A and boot the Server trough the single Port
The single LSAN_zone had around 650 WWN.
Is not a joke!
12-21-2018 08:14 AM
The lsan tag is there to inform the switch that this is a routed zone.
I'm not sure what the impact would be, but I would guess there could be several:
It's routed. So it attempts to import the device from outside the fabric. As it resides inside the fabric, this could be one impact.
Another impact could be that this lsan zone does not exist outside the fabric. This could cause issues within the Backbone.
Another impact would be identification during troubleshooting.
Another impact is that lsan zone do *not* allow aliases. WWPNs *only*!
12-21-2018 11:28 AM
I've remember one situation with 3 DC routed coniguration and more than 2500 LSAN zones. Routers rebooted randomly as the memory of switchs run out.
This is not really true, if the all members of LSAN zone will be in same fabric the PID will be not expored. LSAN will beave as regular zone.
01-02-2019 11:38 PM
with the command:
you may show actual treshold settings for FC router.
with command :
you may check how many resources is currently occupied
switch:admin> fcrresourceshow Daemon Limits: Max Allowed Currently Used ---------------------------------- LSAN Zones: 3000 108 LSAN Devices: 10000 81 Proxy Device Slots: 10000 25
For max count as per admin guide:
By default, this limit is set to 3000, which is the minimum. This command lets you create more LSANs on your edge fabric, up to 5000, if needed to support additional devices. The maximum number of supported LSAN devices is 10,000.
01-04-2019 04:40 AM
I still have a way to go to 3000 zones:
None lsan zones:
ssh switch_1 "zoneshow" | grep -vi lsan | grep zone | sort -u | wc -l
ssh switch_1 "zoneshow" | grep -i lsan | grep zone | sort -u | wc -l
ssh switch_1 "zoneshow" | grep zone | sort -u | wc -l
But it would be nice to clear out the impact on performance for using lsan zones.