• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 118
  • Last Modified:

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


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.

Nourhan Hassan
Nourhan Hassan
2 Solutions
Richard MurphySenior Network AnalystCommented:
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.
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.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

We Need Your Input!

WatchGuard is currently running a beta program for our new macOS Host Sensor for our Threat Detection and Response service. We're looking for more macOS users to help provide insight and feedback to help us make the product even better. Please sign up for our beta program today!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now