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

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1answer
17 views

3 NICs in VMware ESX 5.5.0 cannot connect to each other

I have a Vmware ESXi 5.5.0 hypervisor, installed on a desktop pc with 3 physical NICs. The first NIC is connected to the internet (WAN), the 2nd and 3rd NICs have Access Points installed (plugged in) ...
2
votes
2answers
74 views

Can PoE kill unmanaged switches?

Two simple unmanaged switches have died in the same cabinet in two years, one at 18 months and one just today at six months. Both times we gradually experienced increasing intermittent verified ...
0
votes
2answers
30 views

Does all Layer 3 capable switches able to do Layer 2?

I was tasked to find an affordable Layer 2 Switch around our area but can't seem to find one... in fact I found a Layer 3 Switch that seems to be cheaper than the Layer 2 i came across somewhere. I ...
-1
votes
1answer
75 views

Allow Internet access across vlan [closed]

this is my lab: I have the switch netgear gs724tv4, I have a modem router for Internet access with dhcp that can lease only 5 ip addresses. The ip subnet for the modem router is 192.168.1.0/24 I ...
0
votes
1answer
37 views

Is it possible to bridge/join two or more vritual (Hyper-V) switches with the same address range over VPN?

I have several Hyper-V servers which are not in the same LAN. On every server are several Hyper-V guest VMs which are connected via an internal virtual switch. Now I want to to connect these two ...
0
votes
1answer
54 views

How to implement a network fault tolerance on a Windows Server 2008 R2, Single Server - Dual NIC? Only Windows Services like DNS, DHCP, File Server

Diagram 1: Server, VIP IP Address, Network connections, Switches and Clients http://imageshack.com/f/f0AkA9RKp Hello There! We have an IBM x3650 M3, Dual NIC. We have Windows Server 2008 R2. In this ...
2
votes
1answer
28 views

VLAN routing query on HP Switch

I have Layer 3 HP switches throughout my organisation. They are set up to perform routing between all the VLANs connected to them, and everything is working. I am pretty proficient with using them, ...
0
votes
2answers
45 views

How can I use SSH to run Cisco IOS commands in Global config mode?

I know about Kron, but there is supposedly no way to run global config commands: http://www.techrepublic.com/article/schedule-commands-with-cisco-ios-kron/ If I connect using Putty, Putty is able to ...
1
vote
1answer
35 views

Connect access switches to router or core switch

My workplace consists of 4 access unmanaged network switches from three different computer rooms connected to a router. The router contains three 100mbps ethernet ports and one Gigabit (GigE) port. ...
0
votes
0answers
32 views

Dell 5548P, MIB value for port security violation notification

Anyone have idea on MIB values(OID value) for Port security violation notification with dell 5548P switches.On Cisco its [1.3.6.1.4.1.9.9.315.0], not sure whether i can use the same for montioring ...
0
votes
0answers
16 views

Trunking between dell 6248p and extreme summitX440 switch

Hi Guys I'm a little bit confused and I can't seem to find what's wrong with my configuration. When I use switchport mode access on both sides, I can get connectivity. After confirming that, I need to ...
2
votes
1answer
71 views

Operational State Down on QLogic Switch

I have a QLogic SANbox 5800 Fibre Channel Switch with 20 SFP ports. Out of these 20, I can use only 16. The last 4 ports are showing Operational State Down. SANbox (admin) #> show port ...
1
vote
0answers
38 views

Cisco SG300 switch does not send RADIUS messages to server for 802.1x

I want to eventually configure the SG300 to authenticate wired clients with 802.1x and Microsoft NPS (RADIUS). I am currently testing this setup using a single port (Port 7) on my SG300, a test ...
-1
votes
1answer
65 views

Router cannot ping computers behind a switch

Situation is as follows: Setup before: 3 computers connected via a switch [ ZyXel ES-105A , if it matters ]. No DHCP, static addresses. Works fine. Added router Vigor 2700VGST [ I'm working with what ...
2
votes
3answers
85 views

VLAN planning and questions

I currently manage an environment with IP addressing of 10.10.10.x/23. We have 3 VLANS set up, and I use that term very loosely. The reason I say I use the term loosely is, the 3 VLANS have full ...
0
votes
0answers
33 views

Connecting to Access Switches Management Console via SSH

In a typical lab setup: [USER] -> [Cisco 2960X] -> [Cisco 3560X] -> [Firewall] -> [Router] 3560X carry all the internal routing, VLANs and is the VTP server. It has below IP settings: Management ...
4
votes
1answer
95 views

Massive packet duplication

Short Version: We've had a problem with a particular server receiving massive duplicates of packets. After much fault finding we found the problem was caused by a switch sending my packet out every ...
1
vote
0answers
38 views

HP 5120 vlan not working

So I have this odd issue with our HP 5120 switches. The VLANs will not pass traffic unless a interface with a IP is assigned to the VLAN. Problem is there is a limit of 8 VLAN interfaces that are ...
0
votes
0answers
55 views

How can I allow NAT from inside to outside and vise-versa when each of my clients will have only one static public IP using an ASA5525-X?

My network topology is pretty basic. My data center provides a router and added a switch just before my cage to provide connectivity to all of the racks. My rack takes the copper drop they provide and ...
0
votes
0answers
42 views

Cisco 3560-X and Bind9 DDNS integration

Experts, In an infrastructure I'm currently working on, we have one Cisco 3560-X as a core switch and an internal Bind9 DNS server. The 3560 is acting as the DHCP server. BIND9 currently has names of ...
1
vote
2answers
161 views

HP 2510G Loop Protect doesn't work

I have a problem with Loop-Protect on a HP 2510G Switch. I configured Loop-Protect with loop-protect all receiver-action send-disable and set transmit-interval 1 and disable-timer 30. I tested my ...
1
vote
1answer
76 views

Cisco Catalyst 3560 PoE 48 with setting interface to auto qos voip trust

All I'm trying to do is copy the running-config from a Cisco Catalyst 2560 PoE 24, to a Catalyst 3560 PoE 48. This is f0/1 from the original switch: interface FastEthernet0/1 switchport access vlan ...
-2
votes
1answer
30 views

Is HP-2920-24g switch compatible with CHEF setup? [closed]

I am using HP 2920-24G switch. In that,I am trying to build the setup for CHEF Client. But it shows error while bootstrapping. Is that HP switch supports CHEF or not?
2
votes
1answer
233 views

Is there a standard managed switch configuration protocol?

is there a vendor-independend managed switch configuration protocol e.g. for creating VLANs that can be run over TCP or serial port?
0
votes
1answer
53 views

Network flow path using spanning tree protocol

I have two machines, A and B, connected via switch S1(master) and s2(slave). I want to measure latency and identify packet flow path from machine A to Switch,switch to machine B. If the link between ...
3
votes
2answers
258 views

HP ProCurve 5406zl does not accept direct attach cable with error “Not an HP Networking transceiver”

I have an HP 5406zl switch running the latest firmware in the non-early release branch (K.15.14.0007, ROM K.15.30) and it is not accepting direct attach SFP+ cables in its SFP+ module. The module is a ...
1
vote
0answers
42 views

Measuring latency with switch and identifying flow path

I have two machines, A and B, connected via switch S1(master) and s2(slave). I want to measure latency and identify packet flow path from machine A to Switch,switch to machine B. If the link between ...
-1
votes
1answer
41 views

What is the difference between an accelerated LAN port and a regular non-accelerated port? [closed]

Can someone explain the difference for me? Wondering more about the difference for the end user, but a technical description would also be helpful.
0
votes
0answers
42 views

SG300-52 Remote Management Layer 3 Connectivity

I have a brand new SG300-52. I was able to successfully access my switch remotely when on Layer 2 but once I switched to Layer 3 and reset the switch to factory settings I can no longer configure it ...
2
votes
2answers
119 views

Cannot disable mac restriction on port for HP Procurve 2626

I have a HP Procurve 2626 as the main trunk for several subnets in production. I am a UNIX systems administrator and not a networking guy, but I've worked with cisco switches and some of these HP ...
-2
votes
1answer
99 views

ethernet switch makes network down [closed]

I have a D-Link 8-port Ethernet switch which was perfectly working. Since 2 days ago it makes the entire network down. The problem is when I disconnect the cables it runs again and after I connect ...
2
votes
2answers
50 views

What drawbacks does VTP pruning pose?

I'm currently learning a bit about Cisco switch configuration and VLAN configuration, specifically VTP. Reading on Cisco's site, the feature of VLAN pruning appears to not be used on a switch/VTP ...
1
vote
1answer
53 views

NTP Server in Network Switch

Is it possible to set up a Switch to acts an NTP Server for the devices connected to its VLAN ? If so ,how can I implement it my HP Switch A3600 JG299A. I want to do this because I do not have ...
2
votes
1answer
105 views

Production servers can suddenly not access the internet anymore

Problem All Production Servers were suddenly not able to access the internet anymore, while four other Servers connected to the same VLAN and same eth0 settings can. Figure 1: System 1 represents ...
1
vote
2answers
69 views

simple setting for traffic shaping

I have: 2 linux boxes (A, B) 1 switch (S) 1 gateway (G) [I have no control over this one] +---------------+ | switch S +-------+ +---+--------+--+ | | | ...
0
votes
0answers
32 views

HP 5800 VLAN Translation

I have a network of HP 5800. We route customers on different CVLANS but have them all within the same SVLAN. I have a PPPoE server that runs on 1 switch on VLAN 1500. Example: Site1: 1000:2 Site2: ...
1
vote
0answers
81 views

DRAYTEK - VLANs with VLAN tagging switches / router

Our company uses Draytek routers (various models, slowly upgrading to 2860n at each site). We have recently purchased a new site, and want to split the network up into separate VLANs, so as to ...
0
votes
0answers
22 views

How can I use accounting records on cisco ise authorization?

I'm going to switch from windows NPS to cisco ISE for central authorization on the network. I implemented 802.1x & other needed authentications using it. However, on some points, I need to control ...
2
votes
1answer
71 views

Cisco switch, white residue in switch ports

I have 2 cisco small business switches, unknown age and provenance, both have developed a white residue on some of the switch ports as below image: Any ideas what causes this? It looks a little ...
-1
votes
3answers
68 views

3x networks, hardware in 2 locations, 1 connection to join them

Sorry it was hard to think of a title for this, so hopefully I can explain my situation. We have hardware (unix servers) on 3 different network subnets. For example: 10.44.1.0 10.44.2.0 10.44.3.0 ...
3
votes
2answers
285 views

What does 'Si' mean with respect to network switches?

I am seeing references to Multilayer Switches with Si as in the network symbol below. What does the 'with Si' qualifier mean?
1
vote
1answer
101 views

Setting Up VLAN on Dell Switches

I need to create a vlan on a dell switch. I'm brand new to vlans, and have a few simple questions. I have the MAC addresses for devices that are plugged into the switch, how can I figure out which ...
3
votes
1answer
153 views

How to install and run Puppet Device in order to configure Cisco Switches and Routers?

According to this documentation it should be possible to configure a Cisco Switch by using the Puppet Module Device. Where could this module be found? Is this module restricted to Puppet ...
1
vote
2answers
76 views

Point of Shared Secrets on RADIUS Servers over a Cisco Switch

I was wondering what the point of Shared Secrets are on RADIUS servers if I set the secret in the Cisco switch configuration. If the supplicant wanting to be authenticated does not have to know it, ...
0
votes
1answer
86 views

Switch crazyness

I have a couple of switches here which gives me a headache. Sometimes it works, sometimes it doesn't the whole thing makes no sense. So I linking 2 vlan capable switches together on a regular access ...
5
votes
3answers
443 views

Gigabit uplink versus regular switch port

I have a 10/100/1000 24-port + 2 mini-GBIC ports switch which I have to link to other switches. Unfortunately, on the other switch all the mini-GBIC slots are taken up, so all I can do is link them ...
0
votes
1answer
72 views

Dell PowerConnect reboot - View unsaved changes?

We have two Dell PowerConnect 7024 on our site and, for scheduled electrical maintenance; we’ll have to switch them off for a couple of hours. This will be our first time doing this and, in order to ...
0
votes
1answer
45 views

Ethernet switch signal quality

Is there a (significant) signal quality difference between ethernet switches? n other words: A 1000base-t, do some switches allow longer cable runs than other switches?
-1
votes
1answer
91 views

Designing a secure network layout

Over the last few years I've accumulated a lot of hardware that all currently exists on a flat network. There are a number of devices: my desktop, laptop, and computers of the rest of the people I ...
0
votes
0answers
77 views

Access switch on the LAN from a WLAN connection Sonicwall TZ205

I have a setup like the following Modem >>> Sonicwall TZ205 >>>> Linksys 8 port smart POE switch >>>> Linksys LRT224 When I am on the LAN through a wired connection ...