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19872
March 12th, 2014 16:00
What are the bare minimum commands to get a 3-switch PC6825 stack working with inter-switch Link Aggregation?
I'm brand new to PowerConnect switches, although I am familiar with the concepts of VLANs, link aggregation, and spanning-tree.
I'm on a deadline to get some new 6248's installed in our racks and have them operating as a stack. What are the bare minimum commands to get:
- Three switches in a stack (master/standby/member)
- 2 ports aggregated between each switch (full redundancy) with NO switching loops
All switches are running firmware v3.3.9.1 (January 2014).
thank-you
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DELL-Josh Cr
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March 13th, 2014 13:00
Use the interface range Ethernet 1/g1-1/g2 to select the ports you want in the port channel. Page 293
Channel-group 1 mode auto to create the lacp lag page 440
Select the channel group with interface port-channel 1
Switchport mode trunk page 601
Switchport trunk allowed vlan [vlans you are using]
http://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_powerconnect/powerconnect-6248_Reference%20Guide_en-us.pdf
DELL-Josh Cr
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March 13th, 2014 08:00
Hi,
If the switches are in a stack they are going to behave as a single switch, so you are not going to need a LAG between each switch, just redundant stacking cables. Here is the stacking whitepaper. http://www.dell.com/downloads/global/products/pwcnt/en/pwcnt_stacking_switches.pdf
If the stacking cables are connected to the stacking ports it will stack automatically and there will be no configuration. Power on the switch you want to be the master, let it boot all the way, power on the unit you want to be the standby and let it boot all the way, then power on the last switch.
ntiadmin
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March 13th, 2014 09:00
Hi Josh, thanks for taking time to reply.
We don't have any stacking cables (not in the budget right now) so I was hoping to use a couple of the regular gig ethernet ports in a bond to act as the interswitch links. Is that possible with this model of switch?
DELL-Josh Cr
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March 13th, 2014 09:00
Unfortunately this switch requires the dedicated stack port modules to be able to stack. So you would have to leave them as separate switches and use trunk ports to carry the data between them.
ntiadmin
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March 13th, 2014 13:00
Okay that's what I suspected, thank-you. Do you have the commands to get a LAG or LACP trunk up and running? I'm coming mostly from the Cisco and Linux world, and I'm having trouble figuring out the right commands to get a group up.
DELL-Josh Cr
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March 24th, 2014 07:00
Probably will have some interruption until both sides of the LAG have been set up.
ntiadmin
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March 24th, 2014 07:00
Hi Josh, apologies for the delayed reply, I was out of the office. Will this cause a traffic interruption on the ports being bonded?
ntiadmin
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March 24th, 2014 16:00
Hi Josh just wanted to report that I was able to successfully configure a LACP port-channel group and pass traffic over the links today. Thanks again for your help.