10-21-2010 05:01 AM - edited 03-06-2019 01:39 PM
Let's say I have a 3560x 48 gigabit port switch. It has a network module in it that has 4 SFP slots.
Let's also say that one of the gigabit interface ports is open (say, port gi0/48).
Is it best practice to make interface gi0/48 the trunk, or one of the SFP slots with an SFP module, assuming it's using 1000BaseTX.
10-21-2010 05:07 AM
cinmachina wrote:
Let's say I have a 3560x 48 gigabit port switch. It has a network module in it that has 4 SFP slots.
Let's also say that one of the gigabit interface ports is open (say, port gi0/48).
Is it best practice to make interface gi0/48 the trunk, or one of the SFP slots with an SFP module, assuming it's using 1000BaseTX.
The network module is specifically intended for use a uplinks to other switches so i would recommend using those if available. Having said that it's not the end of the world if you need to use one of the 1 - 48Gbps ports as an uplink.
Jon
10-21-2010 05:25 AM
I could be wrong, but I'm not sure that's the case about the purpose of network modules. Also, it seems logical to me that you'd use a native interface instead of one with additional hardware in it.
I want to know for sure. Is there a white paper on this somewhere or something?
10-21-2010 07:58 AM
cinmachina wrote:
I could be wrong, but I'm not sure that's the case about the purpose of network modules. Also, it seems logical to me that you'd use a native interface instead of one with additional hardware in it.
I want to know for sure. Is there a white paper on this somewhere or something?
So you know the answer to your own question
From the 3560-X datasheet -
• 24 and 48 10/100/1000 PoE+ and non-PoE models
• Optional four Gigabit Ethernet (GbE) SFP or two 10GbE SFP+ uplink network modules
so it would seem that the network modules are indeed for uplinks.
Jon
10-21-2010 07:59 AM
The question would seem to be which port is best to use for an uplink. You have a 3560 Switch with four SFP ports. I use Cisco 3750 Switches with the same SFP ports available. I standardize by always using the last SFP (highest numbered port) for the uplink (on stacks, always the first switch). As a rule I only use the SFP modules for fiber. I use 1000 GLC SFP's only when the switch doesn't have any gig ports or when it's close enough and/or practical enough to use copper for the uplink. I don't think that there is any set manner in which to choose the port used as an uplink. Standardization I think is an important key.
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