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1 Rookie

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5 Posts

520

January 5th, 2009 23:00

Cascade 2 DS-220B Switches

Good Day All.
I have 2 DS-220B, 8 port each.
Is it possible to cascade these 2 just as in Ethernet switches so I can "see" the 14 devices on my SAN?
If I connect a 10M fibre cable LC-LC between the two the ports start blinking and I cannot "see" devices on the second switch.
Do I need to go into switch administration and enable some feature?

Thanks a lot.

6 Operator

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5.7K Posts

January 6th, 2009 02:00

if you connect 1 port on each switch together, a trunk should automatically form. Make sure the port is set to E port (Expansion). Furthermore the domain ids of both switches should NOT be the same !

So:
1) different domain ids on all switches in the same fabric
2) port type should be set to E

1 Rookie

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5 Posts

January 7th, 2009 10:00

Thanks.
The switches are brand new and if I connect a cable betweeen them ports just blink.
So I guess I have to telnet into the switches to put this config you are telling me, right ?

11 Legend

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20.4K Posts

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87.4K Points

January 7th, 2009 11:00

can you telnet/ssh/console connect to the switch ?

once connected run:

switchshow

in the output look for switchDomain string. Document what it is. Connect to the other switch and do the same thing. If switchDomain number is the same you will need to change it on one of the switches.

Please do it before you have connect any systems and this procedure takes switch offline !!

1) disable switch, this stops switch functionality

switchDisable

2) Run configure process, i take all default and just change the domain id value.

configure

Output will look something like this:

Fabric parameters (yes, y, no,n)[no] ..yes
Domain: (1..239)[1] ... 2 <- in this example i set switch domain id to 2, make sure it's different from the other switch. So you could have one switch set to domain id 1 and the other one to domain id 2. Then you will be prompted for more parameters ..just take defaults unless you know you need something else to be changed.

Once you finish, the switch will tell you that you have to reboot, so go ahead and type "reboot". At this point you are ready to plug the cable between the two switches. Typically the port will automatically switch to E-Port, verify this by connecting to the switch and run "switchShow".

6 Operator

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5.7K Posts

January 19th, 2009 03:00

Are you fine with these answers or do you need more info ?
You can also http to the switches and perform the config changes there.

1 Rookie

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5 Posts

January 30th, 2009 08:00

Sorry for the delay.
This project has been put on hold so I haven't tried the solutions you gave me but as soon as the project is alive again I'll try them.

Thanks a lot.
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