julde
Guest
|
 Posted:
Mon Jun 13, 2005 2:39 pm Post subject:
Port trunking & stacking |
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|
Hi,
I have 2 front switches which are both Dell 6024 and support port
trunking and stacking.
I stacked them, so they can be viewed now as a single switch.
------------- stack -------------
! DELL 6024 !-----------------! DELL 6024 !
------------- -------------
| |
| |
| |
| 1 Gb/s |
| | 1 Gb/s (trunking: link=2Gb/s between
5324
| | and the 2 stacked switches
6024)
| |
| |
----------------
! DELL 5324 !
----------------
I want to realize a broadband port trunking between my dell 5324 and
the 2 dell 6024. Question are : if one of the link is broken, does the
system still work with one aggregate link ? Do I need the spanning tree
? (I think no, because the redundancy is not a ring, but two ports
which are aggregated, but I'd like a sure answer).
Thanks in advance for replies.
Best regards,
Julien |
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T. Sean Weintz
Guest
|
| Posted:
Mon Jun 13, 2005 9:22 pm Post subject:
Re: Port trunking & stacking |
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julde wrote:
| Quote: | Hi,
I have 2 front switches which are both Dell 6024 and support port
trunking and stacking.
I stacked them, so they can be viewed now as a single switch.
------------- stack -------------
! DELL 6024 !-----------------! DELL 6024 !
------------- -------------
| |
| |
| |
| 1 Gb/s |
| | 1 Gb/s (trunking: link=2Gb/s between
5324
| | and the 2 stacked switches
6024)
| |
| |
----------------
! DELL 5324 !
----------------
I want to realize a broadband port trunking between my dell 5324 and
the 2 dell 6024. Question are : if one of the link is broken, does the
system still work with one aggregate link ? Do I need the spanning tree
? (I think no, because the redundancy is not a ring, but two ports
which are aggregated, but I'd like a sure answer).
Thanks in advance for replies.
Best regards,
Julien
|
The two stacked swicthes may not even allow the configuration you
propose - many switch stacks require all 802.3ad trunk groups to have
all the links on the same swicth. I think this is beacuse even though
the stack gets managed as a single device, as far as moiving packets
through the swicth is concerned, the stacking port is just like any
other port, and the two switsches in the stack are just two connected
sitches. Many go even further that than and require them to be in the
same group of 8 or 16 ports on the same switch. I thhink that is because
they use 8 or 16 port switch ASICS and just stack them internally.
I am unfamiliar with the Dells, so check your manuals. Hopefully none of
the above applies to your situation.
Otherwise, to answer your qusetions: no, you should not need spanning
tree, and yes, assuming the trunking is 802.3ad, it will continue to
work if one link goes down and there is only one link left in the aggregate.
If it's nopt 802.3ad but some proprieary trunking, then I dunno. |
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