Switches / Hubs

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A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

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We currently have 3 sites. Each site has a Cisco 3560  switch that serves as default gateway for each site. These are 10/100 switches and have 15 years of config changes layered in. A lot of the confi…

118 views
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Hello Experts,

Please see diagram attached, I have a scenario where i have dual CE-PE configuration and need to enable mutual redistribution between BGP and OSPF. My concern is with routes being re…

526 views

I have HP Procurve 3500yl POE swithes and one of the switch showing following:
fault-finder bad-driver sensitivity high
fault-finder bad-transceiver sensitivity high
fault-finder bad-cable sensitiv…

40 views

Hi all

Im working on a school. For now we used 2 routers with its own WAN to seperate student and admin network.

I want to get rid of 1 router, to use the new advanced router for both networks.…

420 views

Hi,

What are the Cisco commands to add an extended named ACL to a VLAN interface?

Switch Model: 4510

e.g.  I want to apply the extended ACL called “No-Internet” to VLAN 5.

24 views

I purchased a 6-Port USB Hub by J5 Create that I wanted to use for recharging multiple iPhones, iPads, etc. All the kids were charging their devices on the counter and I purchased this hub to store un…

513 views

Is it possible to ensure a switch always keeps its assigned stack member number?

I understand there is a master which is assigned 0, and each additional switch is assigned the lowest available sta…

411 views

Hi What is difference between a-1000 and 1000 in Nexus7000 when using command show interface status? Please see the below highlighted. Thank you

Eth6/43 dcba connected 500 full a-1000 10/100/1000

316 views

Hi Experts!!! I have another dilemma with vlan configuration. I have vlan 1 for data and vlan 20 for other. I have port has two devices daisy chained. 1st device need to be at vlan 1 and other device …

1123 views

We have a windows server 2008 that runs a student information database.  Wire shark shows almost 100 packets a second going to a multicast address 224.0.0.150.  Any idea what this might be?  I am not …

1121 views
Do You Know the 4 Main Threat Actor Types?

Do you know the main threat actor types? Most attackers fall into one of four categories, each with their own favored tactics, techniques, and procedures.

Does anyone know if there is a flag/switch/command that I can use in Dell PowerConnect switches to display the whole arp table instead for it to wait for user input for the next screen.
Ex. if I run…

113 views

Hi,

I need to create an ACL and apply this to a VLAN.

I want this VLAN (102) to only be able to access the internet, all other traffic blocked - so will need to talk to a DNS Server and DHCP Ser…

525 views

Network will be mostly HP Procurve with a few Cisco switches.
Network comprises 2 vlans.       Vlan 1 192.168.0.0/24     Vlan 2 192.168.1.0/24

With 3 switches as shown in drawing connected with ju…

312 views

my cisco WS-C3850-24T and Cisco Network Assistant ver 6.2 connected with read/write access "run CAN 6.2 as administrator
" to cisco WS-C3850-24T but cannot add vlan and configuration using CNA 6.2 but…

1345 views

Hi Experts,

Can you please guide me I have cisco catalyst 2960-48TTL-L and want to configure it for SSH login.

The ios image on it is LABbase but not sure if it supports SSH.

Do you know i…

819 views

Our school’s network has always had just one subnet for everything. Now, we want to isolate WiFi.  Thanks to help from user SIM50 on a previous Xperts-exchange question, I’ve done this with one WAP, c…

227 views

I have three HP ProCurve 1410-24G switches.  See attached image.

Would connecting the switches together using the mini-GBIC ports speed up the network?  

What type of cables do I need and do I n…

216 views

We have a bunch of 24 port switches - each plugged into a port on our firewall with it's own subnet.

All of the clients attached to a particular one of the switches would lose most connectivity ev…

530 views

I have a windows 7 PC and an alcatel lucent VOIP connected to an HP1910 24 port that is randomly dropping connection. Originally the PC was connected to the phone and the phone was connected to the wa…

119 views
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This is a problem which has soaked up many hours over the past few days.  Currently, our school's LAN does not utilise VLANs. Now, I want to create a VLAN just for WiFi use.  I've created the followin…

936 views

I am planning a solution for a multi-tenant office building. There are Catalyst layer 2 managed switches in place. They want to give about 40 separate businesses their own access to the 50Mbps interne…

427 views

Hey guys,

I've got a backup of our current Cisco SG500x-24 switch. I am backing up the configuration of this switch and need to load it onto the new one we have. I have ensured their firmware is t…

118 views

Hi
I am about to change all our switches and have pre configured spanning-tree and bpdu protection on all the switches.
I have simplified the drawing by removing a lot of switches, however all switc…

1220 views

Dear Experts,

I have an office of 18 users in a single AD domain with 2008 R2 File, Exchange 2010 and SharePoint 2010 servers... our LAN is on four 10/100 Cisco switches daisy chained together curr…

524 views

hi guys,

I've got a Cisco SG500x-24 that has been sitting there in a box. I'm about to put it into production, so I'm trying to configure it. I've upgraded the firmware to 1.3.7.18.

I'm connect…

114 views
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