The ethernet-switch tag has no wiki summary.
15
votes
3answers
805 views
Connecting two desktop switches with more than one cable?
I was hoping to find a way to increase bandwidth between two desktop switches I have, and I wondered if connecting them with two cables (or perhaps three) instead of just one might increase ...
0
votes
1answer
38 views
How to build a L2 Ethernet with 1000 comupters?
We don't really have 1000 computers. I'm asking this question just because my brain is blocked here.
If I put a number of, say 1000, computer on a L2 Ethernet. Since most of L2 switch has only maybe ...
0
votes
1answer
32 views
How to determine remote link speed?
I'm on a non-manageable switched 1 GbE network with mixed 100 MbE and 1 GbE hosts.
Is it possible to tell if a certain host has a certain link speed without looking at the status LEDs of the switch ...
0
votes
0answers
50 views
I need to be able to “sniff” wich IP used the bandwidth [closed]
In a company of 15 computers, mac and PC, one or more computer take all the "web" juice. So then, no one can access there web pages and do simples thing like browse and email. So i need a managed ...
1
vote
0answers
56 views
Tool to parse Dell PowerConnect switch configs to make them more readable and diff friendly
I've been working with many Dell PowerConnect switch configurations over the years, and even though their configuration console is quite IOS like, it doesn't manage configuration statements the same ...
-5
votes
2answers
96 views
half-duplex and full-duplex Ethernet vs Switches and Hubs [closed]
From a youtube video I came to know of the following things
All machines connected to a HUB are a part of a single collision domain.
All machines connected to a SWITCH are a part of a single ...
10
votes
5answers
590 views
If you turn on spanning tree, how do you know there is an issue with your network?
I have been learning about spanning tree protocol (STP/RSTP/MSTP) and was wondering, once I turn it on and it's protecting against for example network loops, how do I know there is a network loop?
I ...
0
votes
1answer
300 views
OS X Server with Open Directory and Network Configuration
I am trying to use a Mac Mini as an Open Directory domain, however it fails on the Open Directory Setup.
The exact error from the log is a below:
Server[308]: An error occurred while configuring ...
0
votes
2answers
119 views
Mismatch between IP address and MAC Address
Suppose you have two interfaces in the host belonging to the same subnet connected to a normal L2/L3 switch port which has a single vlan with interface IP 10.0.0.1.
nxge0 (10.0.0.201) ...
1
vote
1answer
135 views
Cisco SLM248G Switch Hardware Reset
We have two Cisco SLM248G switches within our environment. After some research, it seems that one is causing a few problems because during heavy loads, it is sending transmissions to our firewall ...
5
votes
1answer
180 views
ProCurve network expansion
I've hit a bit of a wall with our network scale-out. As it stands right now:
We have five ProCurve 2910al switches connected as above, but with 10GbE connections (two CX4, two fiber). This fully ...
4
votes
4answers
425 views
How to wire 20 computers and 20 phones and 1 server into LAN?
I have currently 3 switches
Two Netgear JFS524 with 24 slots,
One Belkin with 16 slots.
Server
DSL Internet Router.
Main question is how to connect switches together, two Netgear's are next to each ...
1
vote
2answers
502 views
Difference between ethernet switch and ethernet pass-through
Most blade server systems can have an ethernet switch module or an ethernet pass-through module. What is the difference between both? Is the pass-though module simply "dumb" as a hub? Why would you ...
0
votes
1answer
846 views
Configuring VLAN on Juniper EX2200 switches
I have a Juniper EX2200-24T switch.It is configured as an L2 switch (i.e the interfaces are configured in such way that they do not have an IP address.).I have manually connected the port ge-0/0/0 of ...
9
votes
2answers
375 views
Why WakeOnLAN frames are sent to broadcast
I'm trying to figure out why wake on lan frames, in the simplest form, are designeted to the ethernet broadcast address (FF:FF:FF:FF:FF:FF) and not to the address of the machine to be powered on.
...
2
votes
1answer
355 views
LACP Total Speed
If we were to connect two switches together using LACP (with 2 X 1Gbe ports on each side), does this mean that the max speed that a single MAC address will ever reach is 1Gb?
So for example, if a ...
4
votes
3answers
604 views
Phantom NIC issue causing eth0/1 to drop out
We are experiencing a very strange and frustrating problem. Our company has servers here in Massachusetts, as well as in California. The issues we are seeing are only on the CA hardware. Out in CA, we ...
1
vote
3answers
583 views
Cascading gigabit switch (10/100/1000) with fast ethernet switch (10/100)
I'm a newbie in networking. I have this question in mind lately. I bought a gigabit switch and tried to cascade it with my existing fast ethernet router and switch. I have 1 server which is connected ...
1
vote
1answer
6k views
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?
0
votes
1answer
860 views
Broadcast storm [duplicate]
Possible Duplicate:
How managed switches handle Broadcast Multicast and Unicast?
An application published broadcast message to a network, and caused network switch to drop packet. I have ...
2
votes
2answers
139 views
Are Multiple NIC Ports Needed for a Cross Connect at a Colocation?
If one is going to run a cross-connect in a data center colocation does that mean that it requires another physical network port in the machine being connected? For example if a machine in a data ...
2
votes
2answers
1k views
Will 100 Mbps client slow down 1000 Mbps network?
Newbie question:
We are planning to setup a LAN in our lab, and are looking at gigabit ethernet switches. A couple of our older computers have 100 Mbps ethernet, will they slow down the whole network ...
0
votes
2answers
298 views
Netgear (gsm7224v1) 24-port gigabit switch exhaust fans
I own a Netgear GSM7224v1 (link) 24-port gigabit switch at home. The switch is about 2 years old and works just fine. The two exhaust fans however, are making quite a bit of noise even after I've ...
3
votes
5answers
3k views
How to capture Wireshark packets when using a switched network in Windows
I’ve been asked by our SIP trunk provider to run a Wireshark trace on the network when we receive calls.
The issue I’m having is that if I run Wireshark from a laptop plugged into the main switch I ...
0
votes
1answer
584 views
Which switches can I use for Ethernet bonding?
I'm just about to configure a DELL PowerEdge T410 server with 2 network cards. I'm trying to decide for a network switch and I'll need to configure the server for link aggregation later. I read the ...
0
votes
3answers
427 views
What is the difference between a hub and a switch?
I'm sneeking around online store for used stock of hubs, routers and switches for a project I have to build a network infrastructure.
So far, I have bought:
1x Cisco 2514 Router;
5x Cisco Serial ...
3
votes
1answer
183 views
Failsafe Ethernet Switches on UAV
As a side project we are working on a new internal network for a small UAV and will base it on 100mbit Ethernet instead of serial coms that's usually used for these types of aircraft. We have gone ...
0
votes
3answers
531 views
What could be the maximum number of hosts on a 100BaseTX ethernet network?
I'm having two ip networks (192.168.1.x and 192.168.2.x) bridged on a server, but all hosts (fixed IPs) are on the same physical 100BaseTX ethernet (with a daisy chain of 48ports switchs).
Often, I ...
2
votes
2answers
308 views
H/w suggestions for 24 port PoE switch [closed]
I am looking for a 24 port PoE(IEEE 802.3af) switch to power some Snom phones that I have. Please suggest some appliances. I just need basic L2 functions and wouldn't want to go for a expensive Cisco ...
0
votes
1answer
2k views
Cascading switches: uplink to uplink?
I'm a bit confused as to why I haven't seen any references online to using Switch A's uplink port (1Gbps, 24-port 10/100) to connect to Switch B's uplink port: everything I've seen -- including ...
9
votes
4answers
2k views
How long do managed gigabit ethernet switches take to boot up?
One critical drawback that I have found in researching managed-switches, and one that I have some past experience with is that anything with "lots" of firmware is going to have lots of issues ...
2
votes
1answer
4k views
How does Brocade (Foundry) FastIron CX compare to Cisco 3750 stackable switches?
We're considering Brocade's CX series vs. Cisco's 3750 at both core and distribution layers for a new site with gig to desktop, without POE.
If you have any hands-on experience with FastIron CX ...
0
votes
3answers
627 views
layer 2 failover within the rack
what do you do to avoid downtime caused by top-of-the-rack switch hang / malfunction?
some possible solutions are can be found in this presentation.
i'm interested in hearing how do you approach the ...
0
votes
5answers
367 views
Replacement Switch Suggestion [closed]
We're in the process of upgrading one of our racks from 100MB to 1GB. We currently have a 48 port unmanaged 100MB switch (3Com Baseline Switch 2250). Can anyone recommend a 48 port 1GB switch ideally ...
