Solved

3Com 5500G-EI 3CR17254-91 dual-purposed ports

Posted on 2016-10-23
2
79 Views
Last Modified: 2016-10-27
Dears,

I have 2 3Com 5500G-EI 24-Port (3CR17254-91) switch which has 24 port 10/100/1000 BASE-T besides 4 SFP-based Gigabit ports.

The  4 SFP-based Gigabit ports labeled as 25/11, 26/12, 27/23 and 28/24, ONLY one port of the pair is up. For example, if port gigabitethernet 1/0/28 enabled gigabitethernet 1/0/24 goes Administratively down automatically.

Does that mean the total functioning number of ports is 24 and it couldn't be 24 Base-T + 4 SFP ?!!

Note: the below post shows the same problem with no solution, I've tried all suggested solutions but didn't work.
http://www.networking-forum.com/viewtopic.php?f=27&t=3179&sid=71d6223782d8c31f5373056a0bfcba9b

Thanks,
0
Comment
Question by:Nourhan Hassan
2 Comments
 
LVL 3

Assisted Solution

by:Richard Murphy
Richard Murphy earned 250 total points
ID: 41856419
Basically yes these switches come with 4 dual personality  ports,  3com and h3c made 24 port switches with 4 gig sfp+ dual personality ports,  48 port the same and they made 28/52 ports that were independent.  You can however get interfaces cards for some models that give you 10g xenpac expansion.
1
 
LVL 25

Accepted Solution

by:
masnrock earned 250 total points
ID: 41861953
The short answer is yes, there are 24 functioning ports. 4 of them can be used either as SFP ports OR ethernet, but not both. Switches that are been 24 ethernet + 4 SFP are 28 port.
1

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
ISP Change 14 63
Windows 7 Networking - Public vs. Work vs Public 8 35
rajdeep0081@hotmail.com 3 71
Internet options/Settings 1 45
Join Greg Farro and Ethan Banks from Packet Pushers (http://packetpushers.net/podcast/podcasts/pq-show-93-smart-network-monitoring-paessler-sponsored/) and Greg Ross from Paessler (https://www.paessler.com/prtg) for a discussion about smart network …
When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

856 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