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

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1answer
309 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
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1answer
318 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
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1answer
120 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
88 views

Difference between GBIC and SFP [closed]

What is the difference between GBIC, SFP, SFP+?
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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
110 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
464 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 ...
1
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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
79 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 ...
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0answers
91 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
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1answer
78 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
147 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
511 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
768 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 ...
4
votes
2answers
228 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
742 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
457 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
61 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
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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
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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
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1answer
302 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
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2answers
232 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
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1answer
108 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
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2answers
103 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
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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
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2answers
366 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 ...
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3answers
159 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 ...
1
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2answers
377 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
196 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
281 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 ...
2
votes
1answer
3k views

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 ...
1
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1answer
108 views

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 ...
0
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2answers
495 views

Enable logging for SSH session on Brocade FCX Switch

On my Brocade FCX switch, I'm able to see syslog messages in-line when I'm using a console cable by running the command logging console from the configuration menu. However, when I SSH in, I'm unable ...
1
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0answers
319 views

TP-LINK to HP switch connectivity issue

I have purchased 2 TP-LINK SG3424P switches to power PoE access points. Half of them are connected to one TP-LINK switch that is then connected through a trunk port to a Cisco 3560X and the other half ...
0
votes
2answers
80 views

Assign IP range per switch?

Is it possible to handout IP ranges per switch with the use of one DHCP server? Example, i have 2 Swicthes (A & B). I like to: switch a => 192.168.1.50 - 192.168.1.75 switch b => ...
2
votes
2answers
128 views

STP on network with one switch

If a network has only one switch, does STP take place ? Also, if it does, do the ports of the switch become designated ? Thank you.
0
votes
1answer
250 views

Switch CAM table and ARP messages

When the switch CAM table is empty and it receives an ARP message, does it add to the CAM table the source MAC address ? In Packet Tracer I saw that it does add it, but I read in some book that the ...
2
votes
1answer
126 views

Is there an effective way to monitor the load on each switch?

We have about 200 IP phones in our building and I realize we got more complaint about the phone quality after we switched our internet from 50Mbps to 200Mbps Up/Down. I know there's a possibility ...
0
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0answers
93 views

Routing traffic externally instead of internal loop

I have one Ubuntu box with 2 network cards. I am running netperf on the computer to measure performance of networking equipment, ethernet coming out of eth0 into the switch then back out into the ...
2
votes
1answer
104 views

Multiple subnet on the same switch

A Cisco ASA out of the box is licensed for 2 ½ VLANs. One VLAN for the outside (public) network One VLAN for the inside (private network) A third VLAN which is restricted to be able to talk to ...
1
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1answer
439 views

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 ...
4
votes
1answer
264 views

Linux server reboot brings down LAN network

I have a strange problem in my office network. I have a physical server which runs ESXi 4. Every time I reboot a linux virtual machine (Ubuntu Server 12.04.1 LTS) the entire LAN network goes down. ...
1
vote
3answers
676 views

Enabling jumbo frames on switch but not on devices: looking for trouble?

The switch at hand is a Dell PowerConnect 2716 which does support both VLANs and Jumbo Frames but, as far as I can understand from its manual, it only has a global Jumbo enable/disable setting and no ...
0
votes
1answer
300 views

Networking: Does slavedisk0 take over for disk0 in the event of a fault?

My bootvar is set to boot up images from disk0. The 6500 series switch has two redundant supervisors. Each supervisor has a PCMCIA card with the exact same IOS images in the 0 slot. The secondary ...
4
votes
2answers
595 views

What would cause a PBX or SIP phone to not register on the network when using Netgear Switches?

We have 3 different types of switches in our network. All of our IP Phones are running on HP 2520-24 PoE switches. Our primary backbone is "supposed to be" running on Netgear GS748T switches. ...
3
votes
2answers
144 views

Using Nortel switches for Cisco CCNA [closed]

I need to purchase some to practice on for my upcoming CCNA-exam. I've found a guy selling some Cisco routers, but he's also saying that he has some Nortel switches he's used for his CCNA and CCNP ...
0
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1answer
166 views

Server 2012 Hyper-V: use lan AND wlan for client?

Short version: I am trying to use my notebook as a Windows server 2012 Hyper-V enviroment, which is working quiet well. But I have this question: Is it possible (maybe via virtual switch ...
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votes
2answers
154 views

Why are serial console ports on network switches 8P8C/RJ45 sockets? [closed]

It has always seemed a bit strange to me that the console ports on networking gear are 8P8C (popularly referred to as "RJ45" even though that's not strictly applicable here) connectors and require an ...
1
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0answers
165 views

stop arp poisoning on a 5448 powerconnect switch

We have to disable arp poisoning on our dell 5448 switch. Right now it has all our production machines running on it and I'm not a networking guy at all so I don't want to run a command that will ...