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halbert@bbn.com 04-11-2006 07:16 PM

daisy-chaining 3548 and 3560 switches
 
Hi, I'm interested in knowing if there's a "best" way to daisy chain
(not stack) a couple of switches.

We have a:
Cisco 3548 (48-port 10/100 + 4 gigabit GBIC's), and a
Cisco 3560 (48-port 10/100/1000 + 4 gigabit SFP's).

Right now there's fiber from a 3548 GBIC back to our backbone switch. I
could do one of these:

1. Interconnect a 3548 GBIC with a 3560 SFP port. The 3560 would be
downstream.
2. Interconnect a 3548 GBIC with a 3560 regular 10/100/1000 port
(cheaper; don't need an SFP).
3. Run the fiber to a 3560 SFP port instead, and make the 3548 be
downstream from the 3560, using method 1 or 2 above.

Are the SFP ports on the 3560 "better" than the regular 10/100/1000
baseT ports, in terms of bandwidth to the internal switch fabric? Is
there some reason why the 3560 would a better connection to the
backbone? Assume similar traffic on each switch.

If it doesn't really make any difference, I can just buy the cheapest
sort of interconnects that will work, and I don't have to mess with
fiber adapters, an extra SFP adapter, etc.

Thanks,
Dan


Merv 04-11-2006 09:39 PM

Re: daisy-chaining 3548 and 3560 switches
 


> Hi, I'm interested in knowing if there's a "best" way to daisy chain
> (not stack) a couple of switches.


1.Since the 3560 is a more powerful and more feature-rich switch, I
would place it upstream of the 3548. That way it may be possible to
apply some of the 3560 feature like DHCP snooping to traffic from the
3548.

2. I would connect the 3560 using the SFP fiber portsto your core switch



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