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

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1answer
83 views

VLAN over three switches

We are connecting three offices via fiber optics. For each office we have one switch. In each office there will be one PC which has to be isolated in a VLAN A. There will be other PCs but those three ...
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5answers
2k views

New office cabling: should we use CAT7 or CAT6a? [closed]

We are going to do the cabling in our new office building and we are thinking to lay down 10Gbit cables since we use HP switches that come with 10Gbit ethernet ports. We will also lay down few fiber ...
0
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1answer
142 views

Programmatically interfacing with Managed switches (Cisco 3750)?

I work at an organisation that has a few thousand computers and around 100 switches. To help with the stock take for the computers I would like to programmatically access the managed switches to find ...
0
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0answers
541 views

Does anyone know how to configure a 3Com 4210 switch?

Does anyone know how to configure a 3Com 4210 ? I think I have managed to do a factory reset (Control-B at console prompt on boot and choosing to ignore startup file). The switch does not get an IP ...
0
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1answer
35 views

Command to check server port number opened or not from hp switches

I am facing is that to check the port number of the server is opened or not. DOnt know how to check it and also gone via various hp pdf's with no go. Like in cisco if we want to check whether the ...
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1answer
359 views

Routing between Vlans on layer 2 switch and Cisco router [closed]

Hi I'm quite new to networking and need some help with a home configuration... I have an 8 port TP-Link SG3210 layer 2 802.1Q tag capable switch and a Cisco 1801 router. I set up 3 Vlans on the ...
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1answer
123 views

Single switch to connect internal and external NICs?

We have bunch of servers with two NICs, one is configured with internal IP and one with external IPs. Planning to use a single switch to connect them all together. Here is the current setup: ...
0
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2answers
143 views

Nagios and Switches NOOB

I need some help, I want to monitor the DGS-1024D which is a business grade d-link switch. I have no current way of knowing if any of these have IP addresses on the switch or if there is away to ...
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2answers
3k views

Need help setting up an HP Procurve 2650 switch via serial using Linux.

I recently bought an HP Procurve 2650 (J4899A) off ebay and it came out without a serial cable. So I also purchased a null modem serial cable (rs232) to connect to it (Assuming this is the right one). ...
0
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1answer
140 views

cisco small business 300-10 managed config import fails

Device: cisco small business 300-10 10-Port Gigabit Managed Switch Firmware: 1.2.7.76 The config installation via webinterface with TFTP or http fails with following message in the console ...
1
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1answer
147 views

Isolating Ethernet ports on a Cisco Nexus 5000

We have several machines plugged into various ports on a Cisco Nexus 5000. We want to separate the switch into groups, so a handful of machines can see and talk to each other and no one else. So, to ...
1
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4answers
2k views

new Catalyst 2950 switch, no console or telnet CLI access

I am connecting a brand-new Catalyst 2950 switch to my LAN. It is on with green lights, and frames successfully go in and out the ports. The switch is on the same LAN has my host PC, and pings are ...
0
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1answer
164 views

Firewall connected to a switch using 2 ports (LAN & DMZ), but switch management talks on DMZ port

Someone let me know if I'm off track here. I'm setting up a firewall with 3 ports configured (WAN, LAN, and DMZ). The LAN and DMZ ports both connect to the same switch, on which I will configure a ...
2
votes
1answer
185 views

Catalyst to Nexus Migration - Can 4948s be used for access switches

We currently have a switching topology in which two 7600 make up the core and there are N many access layer 4948s at the top of every few racks. They are trunked to both 7600s. I would like to ...
1
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1answer
248 views

Firewall: Can I use WAN load balancing to emulate link aggregation?

I have a Sonicwall NSA 3500 I'm configuring. It supports 1.5 Gbit of state-full traffic, but a single WAN port only supports 1 Gbit of traffic. The NSA series firewalls don't support link ...
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1answer
133 views

Samba server connected to WLAN router cannot access Windows machines connected to netgear hub

I have a samba linux server connected to the WLAN router. Also connected to the WLAN router is a netgear hub/switch that is itself connected to the office windows workstations. The problem is that the ...
2
votes
2answers
795 views

Should I add a layer 3 core switch or just use the router I have

I just started as the network admin at this company a month ago and inherited this infrastructure. (Router should be labeled 2921, not 2920). Link to see image full size: ...
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2answers
401 views

Redundancy scenarios for a small network centered around a Cisco 3560X switch

As the title says, I manage a small network which uses a Cisco 3560X as the core switch. We have recently got a 2nd identical switch and I have started thinking about how to add some redundancy to the ...
2
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1answer
61 views

May a low DRAM router be a bottleneck for a LAN?

I need to install a LAN that is a hybrid between a star LAN and a cascade LAN. There are two levels (I mean that the maximum number of link to go from the central switch to the most external switch is ...
1
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1answer
365 views

Attempting to configure Dell PowerConnect 6244 No Output from Serial Port

I am trying to configure a Dell PowerConnect 6224 Switch managed switch. The documentation for setup can be found here. However I am unable to connect via serial port to the switch. I do not have ...
0
votes
1answer
346 views

Cisco SG300 switch with VLANS [closed]

I have a SonicWall firewall configured with 3 vlans on virtual interfaces on one physical interface. I have a wireless access point configured with 3 wireless networks configured to each of the three ...
2
votes
1answer
125 views

How to bind stackable switches

Let's say that I have a non modular switch, and that in future I might need to expand my LAN, connecting it to more switches. If I take stackable switches, physically how do I bind them? May I take a ...
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1answer
89 views

Difference between GBIC and SFP [closed]

What is the difference between GBIC, SFP, SFP+?
1
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4answers
1k views

Cisco Switch: trigger mac-address table update

If I run show mac-address-table dynamic I get a bunch of mac addresses on that table. But due to the aging parameter, I don't see the mac addresses of all possible devices on the network that come ...
1
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1answer
117 views

Connecting a switch stack to the rest of the network

I'm planning for some upcoming changes in our network topology and I'm going to have a stack of 4 PowerConnect 3548P switches, to stack I need to use their GbE ports which is fine as they also have 2 ...
2
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0answers
540 views

Issues connecting to HP ProCurve switches

We are having a very strange issue trying to connect to our infrastructure switches via SSH. When you first try connecting to them, the switches will prompt for the password - and then just sit there ...
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2answers
75 views

For a single rack is there a good reason to use an enterprise switch over a more simple option?

We putting up a rack of 12 (maybe 24-30 later) servers (moving off AWS) and we have only a modest level of networking skill on our team (an out of date CCNA admin). In looking at two possible ...
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0answers
83 views

I have a firewall that supports 1Gbit ethernet ports but 1.4Gbit of traffic, can I make use of a 10Gbit pipe from the router in this case?

We're putting up a rack of servers in a datacenter which provides us either a 1Gbit pipe or 10Gbit pipe from the router (our choice, our package includes 10Gbit). But if we have a firewall which ...
1
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0answers
96 views

Is the Foundry BR-FGS624P switch stackable by adding the 10GbE ports, or is it never stackable?

I'm looking at buying a Foundary BR-FGS624P 24 port switch which will suit our purposes now, but thinking into the future I might like to stack the switch when we add a few more servers to our rack. ...
0
votes
1answer
80 views

Securing a switch

I have switch (HP ProCurve 1810-24G to be exact) and it's placed in a datacenter. To secure the switch, there's a lenghty password on it. But, there's one great downside: anyone with the IP address ...
1
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1answer
173 views

Cisco Nexus: list all interfaces with their ips

This is the same as this question, but for Nexus: Junos: find out each interface's ip I need to show all interfaces with their respective IPs. I know that on IOS I can get that with show ip ...
2
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3answers
164 views

Gigabit switches

We currently in our office have a 20 Mbps fiber optic internet connection with Time Warner. We decided to upgrade our connection to 100Mbps. When the technicians came out, they upgraded the circuit ...
1
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1answer
567 views

VLANs Across 2 Switches with a Single Trunk

I'm trying to create two separate networks spanning two switches using a single connection between the switches (Netgear GS108Ts). It seems like the way to do this is to setup 2 identical VLANs on ...
2
votes
3answers
860 views

Is it possible to capture packets of a Router?

I am facing an issue that some packets sent out to internet from inside network were missing. The pattern we are using is like: Client A ←→ Switch A ← Router A:NAT ← .. Network .. → Router ...
5
votes
2answers
232 views

Is there a way to tell a device name (computer name) which connects to the internet jack from a wall without accessing the switch to find out?

I'm not familiar with networking and have been trying to search for info online. From what I have found, there's no possible way to find out the particular physical port of a switch that a computer is ...
2
votes
2answers
763 views

Setting up Hyper-V Server 2012 with active/active failover

I want to set up Hyper-V server according to the following: I want the Hyper-V server to, if both interfaces are up, to use the NIC connected to Switch A for storage traffic, and the NIC connected ...
1
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1answer
594 views

Junos: find out each interface's ip

Sorry if my explanation is confusing. I need to get all the ip addresses of a Juniper Switch and Router (different models). On Cisco IOS I can get that with show ip interface brief | exclude ...
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1answer
63 views

Tenda 1024g Screw Type? [closed]

Does anybody know the type of screw/clip nut I should use for my Tenda 1024g? Thanks in advance!
2
votes
1answer
2k views

Configuring https access on HP A5120 Switch

I am trying to configure HTTPS management on a HP a5120 switch running Version 5.20.99, Release 2215 and not having much luck. I have followed the manual by creating an SSL policy first and then ...
6
votes
2answers
537 views

What kind of cable is this?

I need to cost out some switching and figure out how to network a PC to this type of network. Clarifying: This is to connect units in a high rise facility. Each unit has the top picture in a ...
1
vote
1answer
346 views

Cisco ARP table: determine directly connected devices

I have a Cisco switch and a big list of servers on the network. I need to determine what servers are connected directly to that switch. Will searching for the MAC address of each server in the ...
2
votes
2answers
248 views

How up connect Cisco 3560G to WS-C3560G-24TS-S

I want to link a Cisco 3560G switch with a WS-C3560G-24TS-S (http://www.newegg.com/Product/Product.aspx?Item=N82E16833120039). From what I understand, I can use either two regular switch ports to ...
0
votes
1answer
115 views

Layer 3 Switches and VLAN

We're planning a new networking for the new office and, since I want to manage the three floor with 3 different VLAN Im planning to handle it with a layer 2 switch ( I looked for the cisco 200 series) ...
1
vote
2answers
106 views

3 dedicated wires for 3 VLANs between two switches: (M)STP failing

looking for a couple of hints from you we have a small but peculiar networking need: - 3 vlans, that are to be propagated among two L2 switches - we need to partition the vlans as much as possible, ...
1
vote
1answer
31 views

Use switch or direct link

We are thinking of setting up a high availability PostgreSQL server with master-slave configuration (possibly multiple slaves). Should we use a direct link between a master and a slave or let them ...
3
votes
2answers
376 views

Network Structure

Can you please help me understand when it makes sense to move to a network structure with a managed core switch and managed access level switches. Currently, our network is made up of all unmanaged ...
0
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3answers
161 views

WAP + Ethernet Switch Configuration

I need about 20-25 Ethernet connections so I guess a switch is the only way to go. My question is does a wireless access point create a new network (would it make the wireless network a separate ...
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2answers
407 views

How to manage isolated/dedicated iSCSI network?

This is more of iSCSI switch setup question. I have an isolated iSCSI storage network which includes 2ea managed switches, and setup for redundancy. I could just connect a management pc to one of ...
0
votes
1answer
202 views

Small Business Server Standard 2011 Acting As A Router/Firewall or Connected Via Switch

Using Small Business Server Standard 2011, what is the preferred best practice for a group of about 15 computers. To use it as the router/firewall and have it be assigning DHCP, or have it connected ...
1
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1answer
299 views

Setup Network with two ISP

Currently I have a network with 1 ISP, a router/modem, Gigabyte Switch and a server. All the clients PC are automatically assign IP from DHCP server from a Router/Modem A. Server A have a fixed IP ...