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

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18 views

Host using Linux bond mode 1 (active/backup) connected to 2 x independent switches

I have a host using Linux bond mode 1 (active/backup) connected to 2 x independent switches. Please can someone confirm if this is possible for successful failover between NICS or do I have to ...
0
votes
1answer
13 views

Netgear FS728FP - VLAN traffic isn't flowing

I'm trying to set up separate VLAN's on a new Netgear FS728FPv2 switch. I've never configured VLAN's before. The switch works fine with the default config, with every port as UNTAGGED at VLAN 1 ...
-1
votes
1answer
29 views

How would I access a Cisco router for configuration/management over the public internet

I want to connect a cisco router (2950 series) to my normal broadband router supplied by my ISP. I want to test whether I can access the router over the public internet for configuration/management. I ...
0
votes
1answer
27 views

Mikrotik switched VLAN configuration

With Routerboard 450G I want to configure the 5 Ethernet ports as follows: ether1: vlan3, untagged ether2: vlan1, untagged ether3: vlan2, untagged ether4: vlan2, untagged ether5: vlan1-vlan3, tagged ...
0
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1answer
18 views

VMware systems not working on SRW2048 swtich

I received an old Linksys SRW2048 gigabit switch and have used a straight-through serial cable and the console port to reset the flash config back to defaults so that it is configurable for our ...
0
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0answers
23 views

Switch for 80m cable length [on hold]

Can anyone recommend a consumer switch being able to properly power a 80m CAT6 cable? Currently I have a ADSL modem -> Buffalo WHR-G125 running DD-WRT -> 80m CAT 6 -> Linksys E1200. The G125 doesn't ...
0
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1answer
30 views

ensure “switch redundancy” on a network

I'm struggling in connecting two Windows 7 PCs (each with a 2 port Intel NIC) via two complete redundant paths. And I want to make it transparent to the services on that system. I was thinking on ...
12
votes
3answers
1k views

Why is CAT rating not applied to switches?

I see patch panels all come rated as CAT5e, or CAT6 (and so on). I understand the difference between CAT5e and CAT6 cables, more stringent interference shielding, etc. What I don't understand is why ...
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votes
2answers
42 views

how to detect remote switch speed and duplex?

We have a linux (RHEL) system which will be deployed in unknown networks. To support old networks we want to have autoneg configurable. how do you how detect if remote switch is autoneg on|off, and ...
3
votes
1answer
29 views

pfsense port-security limit mac to 1 (any mac allowed)

I am trying to set up HP procurve routers (25xx and 26xx) with port-security. Goal is to allow client devices and routers. But to disallow a switch, AP or a router in bridge mode. This should be ...
1
vote
1answer
56 views

Packets being routed to the wrong IP

Looked around, can't find a similar issue anywhere... I have been having some very strange and hard to explain problems on my network lately, and in my efforts to find the cause, I came across an ...
1
vote
2answers
67 views

Trying to hookup 10-15 laptops to a switch, could someone point me in the right direction?

Let me start off by saying I am not a system administrator, however I am desktop client support. I have the need to have about 10-15 laptops to be hooked up to a switch that gives all 10-15 laptops ...
1
vote
1answer
22 views

set the Ca name on unmanaged mellanox switch

How can I set the Hostname/Description of a Mellanox/Infiniband unmanaged switch? I would like a way to abstractly distinguish quickly which switches are which when doing 'ibswitches' or ...
-1
votes
0answers
24 views

Accessing HP Procurve JG927A

I have two new JG927A switches that I'm trying to access via the console (or telnet), but the serial console is not accepting any keyboard input (though I can see the startup sequence), and ...
0
votes
1answer
23 views

IRF HP 6125G Blade Switch : determine MAC address of each member

I have a little problem with my HP 6125G Blade Switch. Just to precise, I don't understand much IRF configuration. So i have a hp C7000 blade systems, with embeded blade switches (4). The switches ...
2
votes
2answers
192 views

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 ...
1
vote
0answers
43 views

iSCSI switch replacement (2 VMware hosts)

Good morning everyone, I recently bought two unmanaged NetGear 1gb switches to replace our older unmanaged Cisco 1gb iSCSI switches. Right now, the only devices currently connected to this network ...
3
votes
0answers
17 views

Opennms - Physical interface update on Cisco Switches

I'm using opennms version 16.0.2-1 on ubuntu server 14.04 LTS. I'm configuring some cisco switches to send traps to openms. The traps are notified to events in opennms, if i put a physical ...
0
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0answers
59 views

Cisco 3120 blade switch does not boot after power outage

We use a Cisco WS-CBS3120G-S in a HP BladeCenter. After a power outage, the switch will not boot anymore. The switch dose not output anything on serial console. The LEDs SYST, STCK and active (under ...
2
votes
1answer
41 views

Adding a wired network to our small office

I'm adding a wired network to our small office. We have about 10 employees but may double to 20 in the next 6 months. We have a PC Engine APU router with three ports: Port 1: Uplink Port 2: Unifi ...
0
votes
1answer
63 views

How to route traffic between 2 VLANs on different subnet

I have the following problem: I have one interface eth0 with IP 172.20.51.61/24 I have configured 2 VLANS on the same machine: eth0.120 : 172.20.52.61/24 eth0.200 : 172.20.54.61/24 I also have a ...
3
votes
0answers
19 views

How to get the topology of a layer-2 switch network with the switches' forwarding tables?

Suppose I have a list of layer-2 switches that do not support LLDP (Link Layer Discovery Protocol) but support SNMP. I have the management IP addresses of these switches, but I don't know how they are ...
-1
votes
1answer
53 views

Connecting Win7 to Win7 through switches, EnGenius, and Routers

Weird networks, causing weird problems. I am a new employee at this company, the network is a bit weird, but I have figured it out to a degree. I have some networking knowledge, but not greatly ...
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votes
1answer
32 views

configuring cisco switch sg-300 20 can't change vlan name

I have this very strange issue. Not a biggy because I can do it using the GUI but it still drive me nuts. Just out of curiosity whether anyone has been through this and know the answer to it. It's ...
-1
votes
2answers
54 views

Will computers connected to a switch have a different ip? [closed]

I want to set up a network switch with several servers connected to it that must be port forwarded. Please refer to the below diqgram for my setup: ___Computer 2 | ...
3
votes
1answer
132 views

HP ProCurve Preventing Loops and Users Plugging in Unauthorized Switches/Access-Points

We have a HP ProCurve 2530-24-PoE (J9773A) switch, recently I had a user who plugged in an Apple wireless hardware device to the network - whenever it was connected I got a ton of broadcast warnings ...
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votes
0answers
336 views

Server 2012 R2 Hyper-V Virtual Switch host mac address conflict 331FLR

I have 3 new HP DL360G9 servers all running Server 2012 R2 standard with the Hyper-V role installed. All the servers have the built in Intel 331FLR 4 port gigabit nic. I have the ports teamed into 2 ...
3
votes
0answers
60 views

Stream IPTV through SSL VPN

I have a question about streaming IPTV through Cisco ASA5510 ssl vpn. My current setup at the moment is: Public - firewall (asa5510) - L3 switch - L2 switch But my iptv source feed is coming to L3 ...
-1
votes
1answer
47 views

Switch port VLAN configuration

I have a problem with my switch: ProCurve Switch 2810-48G I got 2 VLAN with this configuration: vlan 1 "DEFAULT_VLAN" untagged 1-36 ip address 172.16.40.201 255.255.252.0 tagged ...
1
vote
1answer
449 views

Nic Teaming Windows Server 2012 R2 - No network connection

I have 2 100Mbps NIC cards installed into PCIe slots and connected each card to it's own desktop 8 port switch. My Settings: Mode: switch-independent Load Balancing: Dynamic / Address Hash VLAN: ...
1
vote
1answer
63 views

Reasons for missing network access on Cisco switch

I'm having problems with a Cisco Catalyst 2950 switch, specifically I'm unable to connect to the router/get internet access through it. The setup is as follows: WAN connected to Router (MikroTIK ...
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0answers
38 views

Connecting a switch to a VDSL2 model causes upload speeds to go to 0

My network configuration has my main router connected to a secondary router which is in bridge mode, and I have a computer connected via ethernet to that secondary router. If the connection between ...
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votes
0answers
23 views

Clear interface config using macro and range in cisco

I want to write macro which than i will apply to interface range and clear to default interface configuration in that range. Is it possible?
1
vote
1answer
59 views

Managed Switch Stability

Our office has been experiencing a series of rolling internet outages over the last couple of weeks which is driving everyone crazy. After isolating a few individual components, my current theory is ...
0
votes
1answer
44 views

Forcing traffic through an IPS on a flat network through a bump in the wire

I have the following topology: Click here, unfortunently I don't have enough rep to post images Essentially I would like the packet flow to go from PC1, to the Core Switch, to the Edge Switch, and ...
0
votes
0answers
40 views

PowerConnect 2808 and syslog

I have a pair of Dell PowerConnect 2808 managed switches. I am attempting to enable syslog on them, but not having any luck. I have searched the web interface, used telnet to log into the CLI ...
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votes
3answers
52 views

Ports from switch to system

I have rcently joined a company and we want to migrate our network to 10.0.0.0 ip address range from 192.168.0.0. Also we want to configure few vlan's But the major challange i am facing is that ...
1
vote
0answers
34 views

burnt Switches connected directly to the internet

We got a setup with a switch between the cable modem/bridge and the two router ports. We burn this switch every 6 months, and it has to be replaced. Symptoms are heavy packet loss or in general very ...
0
votes
0answers
35 views

Dell M6348 switches, how to disable Mac address learning for specific VLAN

I'm trying to disable the Mac-Learning for a specific VLAN on this switch. I was able to do the same thing on my Juniper switches with the command: no-mac-learning; however that doesn't seem to ...
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votes
2answers
64 views

Can I connect many switches to a switch? [closed]

I am trying to make a campus network.I haven't any experience. In campus,there are center building and many buildings.I use many switches(for pc,phone,sec-cameras) in a building.And I want to connect ...
-2
votes
1answer
40 views

Why is there flooding on L2 but not on L3?

Why is it, that on L2 (when there is no MAC Table entry for a new packet) there is MAC Flooding. But at the same time on L3 there is an ARP request (when there is no entry in the ARP table for a new ...
1
vote
1answer
48 views

What are the different Status options for Dell show copper-ports command?

When the below command is issued in a Dell N2024P/N3024F switch show copper-ports tdr The following output is generated Port Result Length Date Gi1/0/1 OK 0 - 10 Jan 1 ...
0
votes
2answers
151 views

Avaya 4850 GTS & VSP 7000 - setting up a fibre trunk, no MLT

I'm a junior network/sys admin, and I'm stuck (and my seniors aren't sure what to do). I have a VSP 7000 switch which is a core switch. And a 4850 GTS switch which is like access switch. The switches ...
3
votes
2answers
289 views

What is the proper way to connect cables from a patch panel to a switch when you have more ports on the patch panel than on the switch?

We're in a situation at our new building where we have 58 drops but only 48 ports on our switch. Roughly 40 of our drops will be in use, but it's a random selection ranging from 1 to 58. Typically I ...
-1
votes
1answer
28 views

What happens when a switch goes offline? and can they be easily exploited through open wifi?

I have two simple questions regarding switches: When a router/ proxy server/ dns host fails, they tend to not allow any packets through. Is this the same with a switch? A switch is connected to 3 ...
0
votes
1answer
88 views

How can I tell if a cisco router is dropping pings due to DOS suspicion or if it's experiencing packet loss?

We use a PRTG server that's connected to a cisco 6500, which feeds a large network of about 1200 switches and radios in a router-on-a-stick topology. In PRTG I'm able to set a 'ping burst' sensor on a ...
0
votes
1answer
27 views

Getting L2 switch info from the data port on a Cisco IP phone?

Here's what I'm trying to do: I'm trying to get the information on which switch/port that a jack wired to. On that jack, there is a Cisco IP phone (7942), and a computer plugged into its data port. ...
0
votes
0answers
63 views

Brocade 6740T connect to management port

I'm having trouble connecting to the management port of my Brocade 6740T switch. Here's my setup: external network --> dumb switch --> Brocade 6740T --> servers | ...
0
votes
1answer
347 views

How to use two different ISP on same LAN with one Ethernet switch?

Sorry if same question is asked on Stackoverflow. I searched and tried some configuration but are not working in my case. I have a LAN with 6 machines which are on same network (each other can be ...
1
vote
1answer
60 views

Setting up a small network with a redundant WAN setup

Asked on the network stack but referred here, partly because lower grade equipment. Small office and we are trying to piece together a network with our two wans (diff ISPs) a switch and a few ...