a device that bridges network segments, operating at the OSI link layer level.

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40 views

For a typical broadband ISP, are nodes on the same subnet routed together or are they bridged?

For a typical broadband ISP, are nodes on the same subnet routed together or are they bridged? In other words, what kind of path will a packet take when going from one node on a subnet to another for ...
0
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1answer
21 views

Is there a device with multi auxiliary (AUX) ports to configure multiple devices

Level: Beginner Sorry for the confusing title. I shall try to explain my best to explain my question. Question: Is there a networking device named X that has multiple AUX ports so that I can connect ...
0
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0answers
17 views

Factory Reset Enerasys

Kind of a 2 problem issue, but I have a feeling one of them is my problem. I have 2 C2G124-24 switches. They work fine and function properly. Problem I am having is that I can no longer access them ...
0
votes
1answer
102 views

cascading load on connected Alcatel-Lucent OmniSwitch units via VLANs

We are having an intermittent issue with a campus of Alcatel-Lucent Omniswitch switches, ranging from model 6000 to 6850. We are having a problem tracking down the root cause of our issue. The seems ...
0
votes
1answer
36 views

different Native vlans on the ends of trunk link

http://www.techexams.net/forums/ccnp/53867-different-native-vlans-ends-trunk-link.html so i read this, but i still can not get traffic between two ends of a trunk link, each with a different native ...
0
votes
5answers
131 views

Giving an IP address outside the network to the router to safely make it a switch?

In our office, all machines use IP address 192.168.0.x with subnet mask 255.255.255.0, the network setup is as below: We only had routerA before. But since its wireless signal is too weak (much ...
1
vote
1answer
42 views

Strategy for forcing cam table updates from custom hardware

I have a system that consists of a control PC, two layers of switches, and 50 custom devices. The PC continuously streams a total of 5.8MB/sec (6000 ethernet frames/sec) to the devices. I have ...
-2
votes
2answers
63 views

Network Switch Terminology (MAC address table) [closed]

When a switch has the ability to learn what MAC addresses each of its ports serves, then uses that to determine which port to send ethernet packets out, what is that feature called? Also, does every ...
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votes
1answer
40 views

Router Switch hanged down [closed]

I have a switch placed in department and connected through Media Converter which is directly connected through optical fiber cable from 3com Switch. Now the issue is Some times suddenly the Endpoint ...
5
votes
3answers
676 views

Can internet gateways be plugged straight into a layer 2 switch?

tl;dr Internet gateways (eg., cable modems, fiber optic gateways) don't function properly when they aren't behind a device with "layer 3" or routing capabilities, correct? Incredibly long backstory ...
5
votes
1answer
92 views

HP 5500 switch manual states SNMP traps impact performance and advises against their use unless “necessary” - why?

We just bought two HP 5500-24G-4SFP beasts and I'd like to properly integrate the switches into Nagios. Most of our current monitoring polls actively via SNMP so I figured it would be wise and use the ...
3
votes
3answers
481 views

What do switches do to tagged and untagged VLAN packets?

Let's say we have a 4-port switch that is VLAN capable. 1 2 3 4 Port 1 is TAGGED to VLAN10` and `UNTAGGED to Default_VLAN(1) Port 2 is UNTAGGED to VLAN10 Port 3 is UNTAGGED to ...
-1
votes
1answer
1k views

How to set up 2 separate VLANs on one switch (HP v1910-48G switch)

I need some advice on how to set up 2 VLANs (on one switch, I have HP v1910-48G switch) that separate broadcast domain and also share a single internet connection. The two Vlans must remain separate, ...
0
votes
1answer
56 views

Cisco switch restart doesn't reload config

Something really strange happened to me today. I was configuring a 3750 switch and halfway through the changes I messed up. So I did what I've always done, unplug the power cable from the switch and ...
0
votes
1answer
50 views

Can a home router separate private network? [closed]

I've just come across this network diagram: http://computer.howstuffworks.com/router1.htm And I am thinking if it can be done with a typical home router. Normally for home router, when we plug a ...
2
votes
2answers
70 views

Cisco Switch went mad

tI have a Cisco SLM2048 Smart Switch which I can't access anymore. The switch is working just fine but: I can't reach it by web interface Doesn't seem to be able to reset it, even if I hold reset ...
1
vote
1answer
191 views

LAN Redundancy - NIC, Cables + Switch?

I'm trying to move to a HA solution and would like to understand what hardware is required to have redundancy in the NICs, switch and cables. The diagrams below show how I envisage a non-redundant ...
1
vote
0answers
88 views

Inter-server connectivity loss after applying cisco switch configurations

I have 2 Redhat servers in cluster. The eth0/eth2 ports on both servers are in bond0(which is assigned IP). The eth0 and eth2 from server1 are physically connected to giE0/3 on switch1 and 2 ...
2
votes
1answer
2k views

Configuring VLANs on HP 1910 switch

I understand how VLANs work, but am not quite sure what the various settings in my HP switch actually do. I have an HP 1910 switch, and I'm using the web interface to configure it (personally I'd ...
1
vote
0answers
86 views

Routing between L2 isolated ports

I am to deploy some managed switches for FTTB/FTTH and preparing configuration to introduce isolation between customers (by disabling L2 forwarding between client ports or using private VLANs). ...
1
vote
2answers
91 views

Avoiding switch loop

Will I have loop problems with this topology because S2 and S3 are both connected to S1 and s4 ?
9
votes
1answer
388 views

Proper method for connecting multiple non-stackable network switches?

I deal with many clients in warehousing and industrial applications who have IT staff or local consultants. Many of these sites are still using a 10/100 Megabit switching backbone... I've managed to ...
-1
votes
1answer
30 views

SMB Server & Switch

I am by no means a server professional, that is why I am coming to you guys for advice. Our company is looking to purchase an office building that is currently wired for ethernet. We are going to ...
12
votes
3answers
711 views

Improvements for small business network?

My question is more-or-less a newer version of this 3 year old question: Small Business Network Switches/General network configuration Summary Everything is Gigabit and we don't have any real ...
2
votes
0answers
58 views

How to fix an aborted firmware upgrade on Cisco SLM2048

There is a Cisco SLM2048 switch and the last firmware upgrade aborted, now the switch doesn't work anymore. I can't access the switch. The only evidence is a blinking system LED. As the switch doesn't ...
2
votes
2answers
111 views

Colocation, Full Rack, Layer2/Layer3 Clarification

We are moving from several 1U servers colo'ed out across several data centers to a full rack in a nearby data center for both physical access reasons, as well as having space for expansion. We also ...
0
votes
1answer
89 views

Multiple DHCP servers on a single physical network?

Today i got put on a project to solve a networking project for a friend who rents out multiple office suites. Internet is provided to all suites in the rent cost. The guy who originally set everything ...
1
vote
2answers
132 views

Is VLAN separation required for multiple networks?

I am setting up a Dell 6248 combining separate switches used previously. I am planning the following architecture: VLAN 1 - External traffic (each server's public interface connects to this) VLAN 2 ...
0
votes
1answer
31 views

HP equivalent of the the FindIT Utility

I think I've lost the configuration on two of my HP-Procurve 1810-24G. I can't connect with either the previously assigned static or the or the default factory ip. Are there any utilities equivalent ...
0
votes
1answer
48 views

Windows 8 machine with 3 NIC functioning as a switch [closed]

I have a workstation with two machines and one LAN port. a mac minia windows tower with Win8 and 3 NICs Can I set up the windows machine to also function as a switch so that I can run a cable from ...
1
vote
1answer
33 views

Backup slowness after changing the SAN switch

We have a netbackup environment Recently we changed the connectivity of two of our sql servers(cluster servers) from one SAN switch(MDS 9509) to another (MDS 9513) followed by which we are ...
0
votes
1answer
396 views

How to connect two HP 1910-48G switches

My company have two HP 1910-48G Switches. One of them is on my flat and the other one is two flat above. I'm not a network guy but my manager wants me to connect these switches and he doesn't want to ...
-1
votes
2answers
63 views

Connect four Modems having same IP with a single Ethernet Switch [closed]

I have a scenario where i have 4 modems connected to a switch. all four modems have IP address 192.168.0.1(default). i want to connect all of these four modems with a single switch in a way that i ...
0
votes
2answers
59 views

Commercial Routers with internal switch [closed]

I often confuse "commercial" routers (which include switching, dhcp, firewall, etc. functionality) with "academic" routers (strictly layer 3). My question can be summed up in the following image: ...
3
votes
1answer
95 views

Finding a network switches IP

These are not Cisco switches or switches with serial cables. They are also on a live 24/7 business network. I was tasked with doing some network work but I don't know the switches IP address and ...
2
votes
2answers
650 views

Is there a way to pass VLAN tagged frames through managed switch?

I currently have a managed switch (DGS-3120-24SC) configured for private VLANs (secondary and primary port groups). Secondary ports are isolated from each other and forwarding is not possible between ...
0
votes
1answer
43 views

How best to setup for high traffic due to thin clients

I develop a client/server software system that is designed to display images to the photographer's customers. A LOT of my customers are using thin clients for the viewing stations, the NComputing ...
1
vote
0answers
101 views

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 ...
0
votes
0answers
72 views

dlink arp spoofing prevention

Can someone can help me understanding arp spoofing prevention on Dlink dgs-3100. I'd like to protect my gateway MAC/IP from spoofing so I have tried to add a rule "IP: 192.168.1.1 MAC: ...
2
votes
1answer
100 views

What could be wrong with my VLAN?

I've got a VLAN 10 setup as a management VLAN. The management VLAN comes off port 48 and links to another set of switches that do not support VLAN's so it was I believe set up as an untagged access ...
0
votes
2answers
37 views

switch duplicates packets and forward in two route

there is a network including a router, two hosts and a switch which connects hosts to router. i have a virtual machine on my system. the network adapter is set to act as bridge. so the virtual machine ...
0
votes
1answer
53 views

Only one server behind a switch cannot access the internet and vice versa

I have multiple servers deployed behind a single switch. All the servers have their own public IP addresses. Suddenly one of them (say A) cannot be accessed from the outside by any means, e.g. HTTP, ...
0
votes
1answer
80 views

can network Redundancy possible with help of Layer 2 switches & dual NIC in one PC & program in java?

I am Trying to achieve Network Redundancy in network which have 1 server & lots of node which use 1 switch for each. As per various forums for achieve Redundancy in network i should use Layer 3 ...
1
vote
0answers
33 views

Juniper 802.3ad Link between Switch and Router 3x link issue

We have a live 20Gbps link between our switch and router and we are trying to add another 10Gbps link to the LAG, we've changed all the settings on both end to add the third interface to the LAG yet ...
0
votes
1answer
183 views

UDP packet loss on Netgear GS110TP

I'm trying to flow data via UDP on two ports of a Netgear GS110TP switch, running the latest available firmware (5.4.2.9). However, I'm experiencing a small amount of packet loss, something like ...
0
votes
1answer
82 views

Private DHCP through a switch using two eth interfaces?

Right now, I have an Scientific Linux blade connected to the internet on eth3, and connected to a 48 port Cisco switch on eth2. This Cisco switch is connected to the eth2 of 24 blank blades (which are ...
-3
votes
3answers
66 views

can power on ethernet for one poe swtich to another layer 2/3 switch?

My question is 1. can we use 1 poe switch as power supply for another layer 2/3 switch? 2. If question 1's answer is yes then What should be maximum distance between those? As per my reading in ...
1
vote
2answers
115 views

How to add multiple IPv4 Subnets to a VLAN using Allied Telesyn at9924 Switch?

I cannot figure out adding more than one IPv4 subnets on a VLAN using Allied Telesyn at9924 Switch I've added the first IP using this command: add ip int=vlan15 ip=xxx.243.117.193 ...
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votes
1answer
59 views

Why do collision may occur if there is duplex mismatch?

In a question on Serverfault It is mentioned that " it is possible for a single host connected to one port to experience collisions if there's a duplex mismatch between the host NIC and the switch ...
1
vote
3answers
124 views

Cisco Switch Out-Of-Box without console access

I have a Cisco C2950-24 Switch Out-Of-Box here. But my laptop doesn't have serial port nor I have the console hub. Is there a way to setup the switch from this state without console access? I have ...