Tagged Questions

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

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-3
votes
2answers
13 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 ...
0
votes
0answers
7 views

Planet IDL-2402 PPPoA without external auth server [migrated]

My school recently bought Planet's IDL-2402 DSLAM switch. They want to run it in network lab for DSL training (from client side). Unfortunately this device has nearly no support on the Internet and ...
2
votes
1answer
57 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 ...
0
votes
1answer
32 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
51 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
26 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
votes
1answer
39 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.
0
votes
0answers
34 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 ...
-5
votes
0answers
29 views

Issues with the management VLAN

I have a switch with it's management interface (telnet,web) on 10.0.10.19. It has various vlans on it and all seems to be working but accessing the switch through this management vlan isn't always ...
0
votes
1answer
59 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
36 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
43 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 ...
-1
votes
0answers
22 views

Interswitch trunk with different VLANs doesn't work

I spent so much time on this that I start to believe that 1 of my switch is faulty. So I have a typical scenario when 2 switches with the same brand (allied-telesis) are connected through a link port. ...
-3
votes
1answer
40 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 ...
-1
votes
1answer
46 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) ...
2
votes
2answers
89 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
32 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
104 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
45 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 ...
-1
votes
1answer
144 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
37 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
77 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
47 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
46 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
34 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
95 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
84 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 ...
2
votes
3answers
116 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
43 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
98 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
47 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
88 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
48 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
326 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
116 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
35 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
237 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
59 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
315 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
43 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
65 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
182 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
102 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
55 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
58 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
115 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
74 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
48 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
126 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 ...