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

learn more… | top users | synonyms (1)

0
votes
1answer
182 views

Cant Connect/Ping to Management Console on Cisco SG200-50 after Connecting networking

I have two of these switches. When I have nothing else plugged in and a cable from port 1 to a laptop on the same subnet I can connect fine, however after plugging any additional networking in I ...
-2
votes
1answer
24 views

Uninstalled server 2008 now router won't handle DHCP

My set up is this. server behind router, router has a server and switch connected to it with multiple computers. router used to serve DHCP and DNS, a couple of days ago installed AD, DNS and DHCP on ...
0
votes
1answer
40 views

Move single ip address accross network or virtual machines

I'm currently trying to set up a small development cluster inside our enterprise network. We have a system to provision "disposable" virtual machines and move them to any of our 12 servers if needed. ...
3
votes
1answer
235 views

HP Procurve 2512/2524 protected port, source port filter or similar?

HP Procurve switches usually have a setting so that the ports are told which other ports they can communicate with. An easy setup using this is to only allow communication with the uplink, so that no ...
0
votes
1answer
55 views

Which would be the best switch for a cloud cluster? [closed]

I am about to set up a private cloud using Eucalyputs on CentOS, and I am confused about buying a network switch. Right now there will be 4 node controllers on my cloud, but in the near future I am ...
0
votes
0answers
152 views

Computers Suddenly Lost Connection to SBS 2008 Server

I am having an issue that I could not explain myself in the entire of my career. The issue is when the entire computers just randomly and suddenly lost connection to the server, running Windows Server ...
1
vote
1answer
56 views

Monitoring bandwidth on a layer-3 invisible switch [closed]

Our servers are distributed to 2 racks in a datacenter, each rack having its own switch. The communication between the racks are made by the link between these two switches. The bandwidth between ...
2
votes
1answer
201 views

switch, procuve 2510, error: OS TFTP in prgrs, SNMP denied

I cannot reboot 2510-24 then I get this message: OS TFTP in prgrs, SNMP denied Smart as I am I just started a new TFTP download of latest firmware, but that is a no-go since another download is in ...
0
votes
0answers
219 views

LACP on HP Procurve 2848

We're currently running 2 x Uplinks to our ISP, in a LACP Trunk, and although the inbound is being balance properly, the outbound is only going through 1 link. I've been told that this HP Switch ...
1
vote
0answers
87 views

Cisco Auto Smartports on catalyst 2960-s

I have Cisco Catalyst 2960-s, I want to configure user defined macros on it. I searched a lot in Cisco documentation but its not for beginners :( How to create a user defined macro that runs when a ...
-2
votes
3answers
100 views

Cisco switch inter-vlan access

I have Cisco Catalyst 2960-s switch and I want to configure three Vlans (A; B; C) I want to : Allow traffic between A and B Allow traffic between A and C Block traffic between C and B or if ...
2
votes
3answers
104 views

ESXi 5x cluster Hardware Failure Scenario

Hello fellas engineers. I have a ESXi5.0 cluster setup with 3 ESXi hosts. Now I need to create a test case for networking hardware failure and preform the test in the datacenter. My Setup: 1) 3 ...
-1
votes
1answer
53 views

Write operation is happening from 1 Gigabit port instead of 10 Gigabit port in NetGear switch and its random [closed]

We have a Synology system which is connected with NetGear switch. We passed 2, 10 gigabit cables from synology to switch. We connected HP server with switch with 2, 10 gigabit port. We connected one ...
2
votes
1answer
338 views

How is my newer Cisco Switch finding the default gateway?

Is there something new that I do not know about with newer Cisco gear. In order to manage my switch I usually have to assign a VLAN 1 interface and add a default route (or ip default-gateway) to ...
0
votes
1answer
114 views

route cisco sg300 traffic through Watchguard firewall

I need help in determining what I need to research. I have two cisco SG300 switches (sg300-52 & sg300-28) and a Watchguard firewall (XTM-23). The internet connection currently passes through our ...
0
votes
3answers
207 views

patch panels… or directly to the switch?

does it make a difference in terms of signal quality if I connect the Ethernet cabling: from the wall-plugs to the patch-panel and from the patch-panel to the switch with a cord. as opposed to: ...
2
votes
1answer
196 views

How can I stress an Ethernet managed Switch?

for testing purposes I need to stress an 8-port managed ethernet switch. Essentially, I want to simulate a scenario in which two hosts on the switch are exchanging data and the other hosts connected ...
1
vote
2answers
72 views

Access switch management on network without dhcp

Could not find default IP of cisco router which was static. Issue is now solved see answer below :)
9
votes
7answers
622 views

What's a good way to handle multiple devices with the same MAC address on one network?

The devices I'm working with come off the production line all set to the same MAC address. I can set each one to have their own static IP, and I'm wondering if there would be a way to connect them to ...
1
vote
1answer
79 views

What is a “dual-central switch”?

In the following description, it states to use a switch that has uplinks to dual-central switches. What is a "dual-central switch"? From the book Hadoop in Practice, by Alex Holmes.
1
vote
0answers
51 views

IGMP 2.0 snooping switch timeout

Suppose a host computer has joined a multicast group 239.0.0.50 via IGMP 2.0. As per the IGMP 2.0 spec, when the host computer receives either a general query on 224.0.0.1 or a group wide query on ...
0
votes
3answers
63 views

Need to add a 3rd switch to dual network structure (2 routers & 2 switches)

We currently have 2 networks utilising the same 2 switches (so a computer attached to either switch can connect to either network), and we need to add in a 3rd switch but we’re not sure exactly how to ...
0
votes
1answer
57 views

Separate static ip's from one port on modem with smart switch

I have a network where our service provider gave us one port on our modem that has static ip's. Was confused on how to separate these ip's. I was going to use a smart switch with vlan as such: vlan 1 ...
5
votes
1answer
109 views

Route traffic directly between nodes in a cluster

I apologize if this is a really dumb question. Objective Ensure that traffic that is meant to go between nodes in a cluster does not (inefficiently) go outside the cluster and then come back in, but ...
2
votes
3answers
578 views

VLANs using one managed switch or link router to unmanaged switches?

I'm the resident IT guy in an office with about 20 workers, amongst 3 separate companies who sublet an office. We are wired with 24 ethernet ports dotted around the offices that all lead to a patch ...
0
votes
0answers
89 views

KVM directly connect to guests without passing router

I have a KVM host running 5 virtual servers. Each virtual server is using a separate bridge interface, like br0, br1, br3... Each virtual server has a own public IP. Now, I would like to be able to ...
1
vote
1answer
480 views

Cisco Port Buffer Memory

How can the total amount of port buffer memory be determined for Cisco switches? Cisco doesn't seem to publish this data anywhere as part of the hardware specifications, but the information seems ...
1
vote
0answers
128 views

Dell PowerConnect SNMP stack member monitoring

I am looking to monitor a stack of Dell PowerConnect 6248p switches via SNMP. There is a stack of 3 switches that I want to monitor. Due to the stack being 1 logical unit it only has 1 IP, so when ...
1
vote
1answer
110 views

Maximum throughput on switch with different link speeds

While doing some benchmarking on a network app I discovered strange behavior that involves 100MBit and 1GBit ethernet clients connected through a switch (at-gs900/8e). I have one server (Gbit) and ...
2
votes
0answers
153 views

Drop Events on a Dell Powerswitch 2724

I have a rather simple network setup here at an office. We utilize a Sonicwall TZ205N, plugged into a Business-Class Cable modem for internet, and plugged into three Dell PowerConnect 2724 gigabit ...
7
votes
1answer
330 views

Are network switch data transfer speed limits per port or per device?

Sorry in advance for the newbie question! When network switches report speeds of say 100 Mbit or 1 Gbit, are they referring to the maximum speed per Ethernet port or is this the physical limit of the ...
2
votes
3answers
107 views

Network Switch for Web Application

I'm migrating a web application from a single server to a three server config, two running the database and one the web tier. I need to purchase a network switch to string these servers together ...
-1
votes
1answer
208 views

Getting packets from one port to another on a Dell PowerConnect 2824 switch

I have a dell PowerConnect 2824 and I have a cat 5 cable connected from port 1 to port 23. Port 1 is reserved for VLAN 1 (the only VLAN that can manage the switch) and port 18-23 belong to VLAN 112. ...
2
votes
1answer
203 views

Spanning-tree setup with incompatible switches

I have a set of eight HP ProCurve 2910al-48G Ethernet switches at my datacenter that are set up in a star topology with no physical loops. I want to partially mesh the switches for redundancy and ...
4
votes
2answers
95 views

Appropriate Network switch for small server cluster

Need to build a small business server cluster for the purpose of crunching data. It will not host a web site that needs to be available 24/7. It does need to support servers that host Redis, a ...
1
vote
2answers
356 views

Having two IP Routes/Gateways of last Resort on an HP Switch

We have an HP Layer 3 Switch that is doing IP routing between vlans. The general set up is that the switch has an IP address on each VLAN and IP routing is enabled. On our servers VLAN, we have a ...
3
votes
1answer
129 views

Unicast traffic between hosts on a switch leaving the switch by its uplink. Why?

I have a weird thing happening on our network at my office which I can't quite get my head around. In particular I can't tell if it's a problem with a switch, or a problem with configuration. We have ...
1
vote
2answers
93 views

IPv6 transition, firewall, router or “security switch” with firewall features?

It seems that I've lost the overview regarding IPv6 and all it's new features... We own a 3Com / HP OfficeConnect Gigabit VPN Firewall (3CREVF100-73) which has NO IPv6 support. Because we are ...
2
votes
2answers
491 views

Stacking and LAGing 4x PowerConnect 8024F's

We are constructing a new networking infrastructure to replace out 1GbE backbone and have decided upon using 4x Dell PowerConnect 8024F's as our "core" switches. As per the diagram below we have 2x ...
0
votes
1answer
112 views

Proper way to connect Cisco Small Business Switches? [closed]

First time network engineer here. I don't have a large budget, so I need to learn all of the skills necessary without pulling in a bunch of vendors. I'm charged with building out a 350port network in ...
0
votes
1answer
227 views

How to allow IGMP traffic on Cisco switches?

I have a network formed by some Cisco switches (a 2960 at the center, some 2950s for distribution). The network uses VLANs, and there are trunks between the various switches. Computers in the same ...
1
vote
1answer
2k views

Setting Up VLANS between a Dell PowerConnect 2824 and 2716

Goals: - Have two Dell switches trunked together with 1 cat5 cable. - Have VLANs of the same number/name passing traffic from switch to switch. - Not allowing any traffic from one VLAN to pass to a ...
0
votes
1answer
49 views

A complete newbie installing virtual switch on WinServer 2008 R2 with Hyper-V

As somewhat of a novice server administrator, I have a question about Hyper-V, WinServer 2008, Virtual Switches and multiple IPs. I have a dedicated box which I access through RDP (also KVMoverIP ...
2
votes
1answer
89 views

Storage Network Stops Transmitting Traffic

I have a troublesome issue. I have a 10Gb storage network serving a VMWare vSphere 5.1 environment. Storage: TrueNAS(NFS) with a Chelseio T320 10Gb Nic Storage: Dell PowerVault MD3600i(iSCSI) ...
0
votes
1answer
35 views

Switch and ARPxMAC

i am doing a research about some switchs behavior in some different situations. And, i got a situation that i really need to clarify. So, that's the point: We all know that when a machine wants to ...
0
votes
1answer
62 views

HPe5406zl switch - stops routing after 2-4 days of uptime

I'm kind of at a loss for ideas on this one so any suggestions would be great. We have an HPe5406zl switch that stops responding after about 2-4 days of uptime. When I mean stops routing it starts to ...
0
votes
0answers
88 views

Dell Switch acl to only allow port 80 and 443 to vlan

I'm not a network administrator, just wondering if the following acl is correct? or seems like it is correct. ACL only allow 10.0.0.0/24 to talk to 172.18.19.0/24 on port 443 configure ACL on ...
0
votes
1answer
76 views

How Do I tie 2 ports of I have a dell 5448 togather for a teamed pair of broadcomm nic's

I have 3 dell 1950 servers that have 2 broadcomm gigabit nic's in them. The Broadcomm software made teaming the pair quite easy. How Do I configure a dell 5448 switch for 3 2GB paths on six ports for ...
0
votes
2answers
1k views

Difference between trunk and tagged port

I am reading some wikipedia articles and RFC 5517, studying VLANs, and I don't recognize the difference between a trunk port and a tagged port. From what the material I am reading says, a tagged ...
0
votes
1answer
96 views

How to see all disabled interfaces in Juniper console?

How to see all disabled interfaces in Juniper console without looking through all of them? I have a Juniper EX4500 switch with JunOS 11.4R1.6 and all 48 ports are filled, so there are 96 interfaces in ...