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

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82 views

DHCP Requests cannot get through Switch

First a little about the network setup: We are a smaller department of a larger school. We have 7 offices with TP-Link managed switches as well as 20 APs and 24 classrooms. The switches, APs and ...
6
votes
3answers
1k views

VMWare distributed switch, VMs from different hosts cannot ping one another

I am using ESXi 5.1 in the hosts, I have setup a distributed switch with corresponding uplink and port groups. When migrating to distributed switch, it seems that VMs from the same host can ping one ...
0
votes
1answer
114 views

Domain network not recognized after replacing switches (Domain Controller or Switch)

I had difficulties with our network speed, we still had 100MBit switches so we made a change and replaced our 3 switches with some nice new ones (1 central 16 port going to 2 switches with 24 ports). ...
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0answers
42 views

Wireless Client missing from MAC table

I am currently having problems with Wireless Clients loosing network connectivity, though still displaying a connection to their Wireless Access Point. I have 4 Wireless APs, each a Cisco WAP321 ...
4
votes
1answer
2k views

HP Procurve 2920 VLANs with DHCP cannot ping

I have problem setting up working VLANs and DHCP server on HP Procurve 2920. My problem is that I cannot even ping computers between VLANs with static ip addresees. winXP pc on VLAN101 with ...
3
votes
1answer
109 views

Cisco switch: is it possible to add a user, which would be able to modify a single specific port?

Is it ever possible to delegate control over a single switch's port to an end user? Here's the situation: let's say a company offers colocation service. Each client's server is connected so a port on ...
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votes
2answers
29 views

How to determine if auto negotiation with switch is finished

When I connect ubuntu network interface to cisco switch, the ports of switch and ubuntu starts auto negotiation. I need to know if auto negotiation is finished or not. The easy way is ping & ...
-2
votes
1answer
188 views

Netgear GS724T - all lights are always on [closed]

I have a Netgear GS724T "Smart" switch. When I power it on, all the lights come on. I have tried a factory reset, but this has not changed the behaviour of the switch. Has this switch failed, or is ...
1
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0answers
119 views

Why don't TP-Link 24x-switches propagate clients when cascaded in two?

I'm behind two TP-Link switches those are cascaded behind a TP-Link router, which is in turn behind a consumer router that works as in modem only mode. Clients connected to the first switch work ...
-3
votes
2answers
110 views

Configuring Allied Telesis AT-9000/28

I am trying to configure an Allied Telesis AT-9000/28. It comes with an RJ-45 to DB-9 connector but my computers lack a serial port. What are my options? I'm on the LAN/same subnet, can I network in ...
3
votes
1answer
94 views

DNS settings on managed switches in LAN

We have a Windows 2008 server that is connected to a managed switch with about 15 Cat5e connections and three fiber branches that go to different parts of campus. At each of these parts there is ...
2
votes
1answer
644 views

Cisco Catalyst 3750 disable Factory default reset with Button press

The Catalyst 3750 Series switch has a front panel button which erases the config and reboots the switch if pressed more than 10 seconds. In a dense Rack it happened more than once to me that cables ...
0
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1answer
59 views

Can a faulty switch connected to the core switch block an entire network?

I encountered the following situation: The network I administer was blocked, and this was traced down to a specific rack, after I reseted both switches, everything worked. I supposed it was the core ...
0
votes
2answers
202 views

Interconnecting a fiber optic switch with a copper switch

What would be the best way to connect from a "fiber optic only" switch to a regular copper rj45 switch? Which of the configurations shown in the attached diagram would work properly? Should I go for a ...
1
vote
1answer
419 views

OpenWRT router as a switch with DNS

We have a router (8 ports) that serves our church (it also is our modem with ADSL2 etc) and handles our DHCP services. I've needed to extend our network to accomodate another 2 ports, so an extra ...
0
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1answer
46 views

How many times does switch calculates FCS?

Does a switch calculate the Frame check sequence (FCS) before sending packets? Because packet shouldn't change, so FCS should also stay the same.
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0answers
90 views

Switch troubles - Cisco Catalyst 2950T 24

At my new workplace, thanks to the old system administrator, we have an unused Cisco Catalyst 2950T 24 (two gigabit ports, 24 100Mbit ports). It was used in a quite weird setup (the place has two ...
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votes
1answer
37 views

Backplane of a switch [closed]

How to practically find the back plane capacity of any Ethernet switch ? Also how to calculate the maximum TX and Rx load on trunk port of switch . And calculation of memory and processor utilization ...
0
votes
1answer
121 views

2x uplinks in HSRP - how to setup switch?

Our ISP provides us with 2x 10G uplinks, and they use HSRP on their end. We see incoming traffic (load balanced) on both ports, but outgoing from us is only via one port. We only run L2 on our side ...
1
vote
1answer
146 views

SFP+ Cable From Uplink Port to SFP+ 10Gb NIC

I have a specific question about using a this 2m passive SFP+ cable to connect the 10Gb uplink port on a switch to a NIC in a server. Switch: Netgear GS752TXS Server NIC: HP NC522SFP I'm fairly ...
-5
votes
1answer
90 views

How do I connect a router on one LAN port to another router on another LAN port on the same switch? [closed]

I have the following setup: For non-technical reasons, I am unable to change the physical setup of the devices. What I'd like to do is have router 2 (a wireless router) act as a wireless AP that ...
-3
votes
1answer
56 views

What type of switch should I get to implement a site with around 140 desktop machines, plus around 20 SIP phones? [closed]

We're moving to a new office and we will be needing to setup a network closet. I'm estimating that we will have around 140 ethernet ports and will be using CAT6a cabling for 1Gbps connections. I'm ...
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votes
1answer
318 views

3 NICs in VMware ESX 5.5.0 cannot connect to each other [closed]

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) ...
3
votes
2answers
160 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 ...
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2answers
36 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
556 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 ...
1
vote
1answer
163 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
512 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 Hello There! We have an IBM x3650 M3, Dual NIC. We have Windows Server 2008 R2. In this Window we will have services ...
2
votes
1answer
61 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, ...
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0answers
44 views

Network access sometimes lost, disabling port security temporary solves?

I have network based primarily on Edge-Core managed switched. Port security with max mac count = 1 is enabled, DHCP snoopping enabled. Some clients have troubles with accesing network, but when I ...
0
votes
2answers
252 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
176 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. ...
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0answers
95 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
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0answers
126 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
250 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 ...
2
votes
0answers
350 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
vote
1answer
91 views

VLAN routing to internet

I am currently setting up a new network and wanted to make sure it is being done in the best way as this is my first time working on a NetVanta 1234P and I am having issues with routing The client I ...
2
votes
3answers
613 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 ...
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votes
2answers
109 views

How to reset HP small managed desktop switch? [closed]

I've got a 8-port J9079A managed switch here that I was using. Unfortunately, while configuring, I must have clicked the wrong option as I lost all access to/through it. I was doing my VLAN setup, ...
0
votes
0answers
70 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
118 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
102 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
188 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
117 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
1k 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 ...
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votes
1answer
96 views

Cisco - what is the purpose of a gigabit ethernet switching module

Cisco noob here Recetly while looking for a cisco switch and router combination for my CCNA studies i won this bid for a (I added the bid to keep track of it and i ended up winning it) ...
1
vote
1answer
298 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 ...
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votes
1answer
54 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
248 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
78 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 ...