Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Dell PowerConnect Fiber Connections

Posted on 2012-04-13
4
Medium Priority
?
1,292 Views
Last Modified: 2016-11-23
I have to draw out a VLAN map for a bunch of Powerconnect 5448s that are used to connect 3 floors together.  There are two fiber connections from teh top floor to the middle floor and then two fiber connections from the bottom floor to the middle floor.  No VLANs or trunks.  EVerything is one subnet.  1 switch on top floor.  4 switches on middle floor.  1 switch on bottom floor.  The fiber connections only go to one switch on the middle floor.

It looks like the person who configured the switches created link aggregation groups on ports 47 and 48 on the 5448s on the top floor switch (LAG1), ports 47 and 48 on the bottom floor switch (LAG1), and then ports 45 and 46 (LAG1) and 47 and 48 (LAG2) on the middle floor switch that connects the other floors.  Looking at the LAG membership page though on the Powerconnect web UI, there are only 48 ports that are options.  The fiber ports are also labeled 45,46,47, and 48 on the switch itself.

My question is...

When someone creates an LAG for ports 47 and 48 on the 5448 and adds fiber connections to port 47 and 48, do the Ethernet ports 47 and 48 become unusable?  Does the LAG on the two fiber ports now in essence become the 47 and 48 that were previously used by Ethernet?
0
Comment
Question by:sedberg1
  • 2
  • 2
4 Comments
 
LVL 17

Assisted Solution

by:TimotiSt
TimotiSt earned 2000 total points
ID: 37847049
I'm not sure if we're talking about the LAG or the combo ports, but:

- If you define a link-aggregation group (LAG) made from 2 or more ports, you basically created 1 new ethernet interface (usually called "port-channel"). From this point on, you configure this interface, not the individual members.

- On the PC5448, the fibre ports are "combo ports". If you install a fibre-optic transceiver (SFP) in the slots, the corresponding UTP (copper) port becomes unavailable, because they share the internal circuits. This provides flexibility (you can use fibre cables), while keeping the costs down (if you don't use fibre, you don't have to pay for 4 working, but unused ports).

Tamas
0
 

Author Comment

by:sedberg1
ID: 37860783
Basically that's what I was asking, ignoring the whole LAG question,

When I connected a fiber cable to port 48 on the switch, does it make the RJ45 port 48 disabled?  Actually, what would happen if I had both ports connected?  What if I had the fiber cable in port 48 on the switch and then an Ethernet cable in the RJ45 port 48 at the same time?  Which one would the switch allow communication through?  Is there a priority set?
0
 
LVL 17

Accepted Solution

by:
TimotiSt earned 2000 total points
ID: 37860831
On most switches, the SFP port has priority.
On the PC 5448, according to the user guide:


If both RJ-45 and SFP are present, and a connector is inserted in the SFP port, the SFP port is active,
unless the copper connector of the Base-T port of the same number is inserted and has a link.
The system can switch from the RJ-45 to the SFP (or vice-versa) without a system reboot or reset.
0
 

Author Closing Comment

by:sedberg1
ID: 37861403
Thanks.  That's the info I was looking for.
0

Featured Post

Ready for your healthcare security check-up?

In the past few years, healthcare organizations have become a prime target for advanced attacks. Does your organization have what it needs to defend itself? Schedule your healthcare security check-up today and download our free Healthcare Security Resource Kit today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

 One of the main issues with network wires is that you never have enough.  You run plenty and plan for the worst case but you still end up needing more.  What many people do not realize is with 10BaseT and 100BaseT (but not 1000BaseT) networks you …
I eventually solved a perplexing problem setting up telnet for a new switch.  I installed a new Cisco WS-03560X-24P switch connected to an existing Cisco 4506 running a WS-X4013-10GE Sup II-Plus. After configuring vlans and trunking,  I could no…
Please read the paragraph below before following the instructions in the video — there are important caveats in the paragraph that I did not mention in the video. If your PaperPort 12 or PaperPort 14 is failing to start, or crashing, or hanging, …
When cloud platforms entered the scene, users and companies jumped on board to take advantage of the many benefits, like the ability to work and connect with company information from various locations. What many didn't foresee was the increased risk…
Suggested Courses

926 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question