Solved

problem with Dell Powerconnect 5448, can ping, but nothing else

Posted on 2013-06-06
3
761 Views
Last Modified: 2016-11-23
I have two Dell Powerconnect 5448. Two switches are configured with LAG on 6 ports. Rapid spanning tree. All other configurations are at default.

a few days ago, I was reported that all computers were disconnected from network. I investigated on servers, the mapped drives are disconnected, system events shows servers can't connect domain servers, DNS servers. I can ping any host, but can't do nothing other than it. I restarted the two switches, it solved the problem. I logged in to switches to check the log, but log is all cleared out and LAG configuration is also reset so that I had to reconfigure it.

It seems, somehow the switches blocks or failed to send/receive frames other than ICMP ping. What setting or configuration could cause this? I like to post settings, but it's too long, maybe you let me know what specific settings you want to know, then I will post here.

Also, this question is seperate from the question above. What is different having 6 ports in LAG than just having 6 ports connected without LAG? The combined bandwidth of 6Gbps ( 6X 1Gbps) ensures data transmission to use all the 6 ports or just evenly redirect each transmission among 6 ports which only uses upto only 1Gbps in max? Reading online, it seems the latter, if then, what is the advantage of configuring LAG?
0
Comment
Question by:crcsupport
  • 2
3 Comments
 
LVL 4

Accepted Solution

by:
dbright5813 earned 500 total points
ID: 39228745
Is it safe to assume that you do not have any IP or MAC access lists defined?

I've never used LAG with more than 2 links between IVFs, but there shouldn't be any issues with your LAG configuration.

Also, are you running the 2.0.0.46 firmware? It looks like there was a bugfix for the switch crashing when using SNMP software.
0
 
LVL 1

Author Comment

by:crcsupport
ID: 39229094
Yes, I updated firmware to 2.0.0.46. I just looked at download & update at Dell, this was the latest.
0
 
LVL 1

Author Comment

by:crcsupport
ID: 39229119
I just disabled SNMP notification and hope the problem doesn't happen in next a couple of months.
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

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

The use of stolen credentials is a hot commodity this year allowing threat actors to move laterally within the network in order to avoid breach detection.
As companies replace their old PBX phone systems with Unified IP Communications, many are finding out that legacy applications such as fax do not work well with VoIP. Fortunately, Cloud Faxing provides a cost-effective alternative that works over an…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
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…

776 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