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Questions tagged [3com]

39 questions
25
votes
7 answers

How many VLANs are too few and too many?

We're currently running a netwok of 800+ PCs and 20+ servers, the network infrastucture is along the lines of Core Switch 10Gb-> Area Switch 2GB-> Local Switch 1GB-> Desktop. All running 3Com equipment(1). We have 3 Area switches for four areas (A,…
Tubs
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9
votes
0 answers

Setting up IPv6 ACLs on 3com 5500g to block Router Advertisment messages

Is there a way to set up IPv6 ACLs on 3com 5500g switch to block RA traffic on access ports? I couldn't find settings for setting up any IPv6 ACL. Acording to guides, there should be ipv6 specific commands, but these were not available. My version…
phandox
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4
votes
2 answers

If a managed network switch were to overheat, would you consider it no longer reliable?

Here is the scenario - I have a network switch, one of several in a stack. It's fan failed. Soon, there were reports of users with network issues. After quickly replacing the fan, the users were fine, network issues were resolved. I…
Scott Szretter
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3
votes
1 answer

How do I factory reset a 3com 5500G-EI?

I have inherited a 3com 5500G-EI without any configuration docs, and I need to reset it to factory defaults. What is the best procedure to do this?
Stefan Andersson
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2
votes
2 answers

3COM Switch dropping broadband

We have a 3COM 3C16980A Superstack3 switch in our office and it keeps dropping out broadband connection. Are setup is this: Internet -> BT Box -> Wifi Router -> Switch -> cables run into the walls to all the sockets round the office. Several times…
Ross Coulbeck
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2
votes
0 answers

How to replace a fan on a 3com SuperStack 4500 unit (and where to find a fan)?

I have a couple 3com SuperStack 4500 switches with failed fans. I am not having luck locating information on HOW to actually replace the fans, or where to find a replacement/what kind. I know what to do, but was hoping there is some information…
Scott Szretter
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2
votes
1 answer

InterVLAN routing on a HP V1910 series switch

Recently bought a HP V1910-16G switch (former 3com 29хх) with IPv4 routing capabilities. After unpacking I did a firmware upgrade to the latest 5.20 Release 1513P06. I did set up additional VLANs (#2 and #3) and VLAN interfaces for those. The…
tintix
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2
votes
3 answers

3com 4500 switch get some info with SNMP

I have 3com 4500 switch. I can got ram and CPU info with these: 1.3.6.1.4.1.43.45.1.6.1.1.1.3 - 1 Minute CPU AVG 1.3.6.1.4.1.43.45.1.6.1.1.1.4 - 5 Minute CPU AVG 1.3.6.1.4.1.43.45.1.6.1.1.1.2 - 5 Second CPU AVG 1.3.6.1.4.1.43.45.1.6.1.2.1.1.3 - Free…
denizeren
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2
votes
1 answer

Users loggin to 3Com switches authenticated by radius not getting admin priv and no access available with radius service down

Following the setup that I have for my Cisco devices, I got some basic level of functionality authenticating users that loggin to 3Com switches authenticated against a RADIUS server. Problem is that I can not get the user to obtain admin privileges.…
3D1L
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1
vote
0 answers

Connecting 2 single switches to a stack

I have a core switch made with 2 stacked Cisco SG500XG-8F8T switches. Now I have to connect 2 3Com Baseline Switch 2920-SFP Plus to extend my gigabit network, but they are not stacked. So I connected them in this way: switch3 (3Com) port 17 (SFP) ->…
Mat
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1
vote
0 answers

View Logs - HP Router

I have a HP MSR30-10 A router at the edge of our network. The rest of our switches are HP, but it turns out the the HP router comes from the old 3Com world and speaks a different language from the switches. Dang! I'd like to view the logs for my HP…
SteadH
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1
vote
0 answers

why do I lose ping to a machine when using port mirroring / monitoring (sniffing)?

I am using port mirroring / monitoring in my 3COM layer 3 switches to look at network traffic (using wireshark). Sometimes, I have found that I loose connectivity with the remote monitor machine (the machine receiving the port mirror traffic). …
Scott Szretter
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1
vote
2 answers

3COM switch "Can't find source file" error on tftp put

I am trying to upgrade my 3COM switch firmware. I am following the instructions on these…
Alptugay
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1
vote
1 answer

VLAN configuration

I have two 24 port 3Comm 2928 managed switches along with several smaller unmanaged switches. Additionally, each user has a VOIP phone that acts as a switch so both phone and PC can plug into the same ethernet jack. I want to segment the network to…
Chris
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1
vote
1 answer

VOIP phones stop working when spanning-tree (STP) enabled on switch

I have a few different types of managed switches, including mostly 3com Super Stacks, Baselines (for example, one specifically is a 3com baseline pwr-plus 2928). Most of them are configured with two VLANs, one for data, one for voice (VOIP). It all…
Scott Szretter
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