Questions tagged [networking]

For questions about networking in general. Any question about all on topic network devices can use this tag.

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0answers
49 views

Switch problems: No loop, no damaged port, so what? [closed]

This is a medium size company. We have a 2960G switch as a core switch, which is connected to three 2960 series Cisco switches by fibers and clients are connected to these three ones. All of the three ...
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1answer
260 views

How do I setup ubiquiti Nanostation M5?

I connected my two NanoStation M5 devices as outlined in the manual. Now I want to login to admin and do the setup but I do not see a related ubiquiti SSID to connect to, to enable me to login to ...
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1answer
42 views

How to check a Switch GE port's link-type?

How to check a Quidway Switch GE port's link-type? I have a S5700 switch, and I want to check its GE0/0/1 port's link-type whether is access. I have tried use bellow command: [Huawei]display ...
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1answer
181 views

How do I resolve connection issues between two 10/100Base-Tx to 100Base-Fx fast Ethernet converters

My network at two points, A and B, have the same connection devices that have been working well until recently. A (A is the internet entry point) transmits internet to B (B is the data centre) and B ...
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1answer
493 views

ARP requests from outside the network [closed]

I need help understanding an ARP Storm PCAP I'm currently studying. My understating is that routers will strip layer 2 info. Therefore, an ARP request frame will not go through a layer 3 device (...
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1answer
50 views

Arista eos eAPI for full config

Anyone worked on full configuration of arista switches using the eAPI? I am going through the ansible eos_ modules and see that there are few missing configs. Do we have to use eos_config module for ...
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6answers
3k views

Do network adapters read incoming bits in a single stream?

When a Gigabit network adapter is receiving data, how is it receiving the bits? Is it seeing it all in one stream of 0's and 1's? Or is there somehow multiple streams of 0's and 1's coming in at the ...
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3answers
415 views

How a packet gets from source to destination or from client to server

I'm trying to understand how a packet gets from client to server. I understand that it leaves the local switch and heads to the internet to get routed to its destination but what happens inbetween? 1 ...
4
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1answer
1k views

What does 'parent interface' mean with respect to VLANs?

I'm trying to learn about VLANs by configuring a router with PFsense installed. Reading the documentation I came across the following sentence: The following example shows how to configure two ...
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1answer
30 views

“Disconnected” computers when updates happen

We run a medium sized afterschool computercafe for kids consisting of 24 computers. We have a problem we cant detect. When we update fortnite, windows updates, or other large updates, we set all ...
2
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1answer
67 views

What is Throughput/Goodput in Node-to-Node messaging

Upon researching, from my own understanding, throughput is the "measurement of ALL data flowing through a link" and goodput is the "measurement of USEFUL data flowing through a link". Knowing this, ...
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1answer
183 views

The number of nodes in a fat tree topology

To my knowledge from papers I have read, the number of pods is the main parameter used to determine the number of switches at each level along with the number of nodes. For instance, in each pod/k in ...
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1answer
489 views

Finding the source MAC address in Router Advertisements [closed]

What is the source MAC address in the Router Advertisement packets received on the interface eth1? -i have ran tcpdump -i eth1 and tcpdump -n -i eth0 icmp6 -ifconfig eth1 and tried using the HWaddr ...
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1answer
34 views

What network elements does the 'last mile' comprise?

From the Wikipedia entry, I take the 'last mile' of networks to means the point at which network capacity is split from the 'trunk' and provided to individual users. So in my mind this could mean: ...
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0answers
50 views

How to design network with high availability in a multilevel small workplace [closed]

I want to create a network in my work 4 floors 50m2*4 workplace. Requirements are simple: Share internet ( < 20mb/s ADSL) while blocking someone from abusing download speed for long period. (...
2
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1answer
72 views

Routing table export

Want to export routing table off Checkpoint VSX firewall and import it into VmWare NSX. How to export routing table from Checkpoint VSX? Thanks in advance.
0
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1answer
40 views

For ethernet with bandwidth B, how much time a node has to wait before sensing the channel after the first collision detected?

Let's say one node detected a collision at t=0, in B Mbps ethernet, how long will that node wait before sensing the channel again?
1
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1answer
50 views

What are the differences between a basic configuration and a full configuration of a network device?

When someone is talking about a basic/base configuration of a network device, does this mean the startup configuration file? And when a full configuration is referenced how is it different from a ...
0
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1answer
107 views

Setting up Hardware for HA

After designing this I went in to start configuring equipment and quickly realized I was missing alot of information/understanding. So the switches (A) between the modem and routers, do they need to ...
0
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1answer
50 views

Setting up VLAN [closed]

One of our clients has an intranet connection and they are reluctant to use internet for our needs (data collection). They have 4 buildings. 1) Admin 2) Canteen 3) EM 4) Mill The configuration ...
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2answers
58 views

Advice on potentially needed subnet expansions

I work for a non-profit with some slightly more antiquated hardware. We have 3 locations, about 700 devices across them. Right now our locations are set up as: Location 1 (Main) - /23 with a DHCP ...
0
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1answer
101 views

Assigning IP Address ranges - Protocol, Best Practices [closed]

I am looking for standard procedures when assigning a range for static ip addresses. Which are the most commonly used approaches and why. I am trying to look on the internet and this forum, however ...
4
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1answer
47 views

F5 BigIQ communication with BigIP

I'm new to F5. Basically a BigIQ centrally manages BigIP load balancers. In order to update the device, I have to login to the UI and apply the changes there. I would like to know how this is done (...
3
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2answers
70 views

Cisco Router 1800 series doesn't route internet

Working on an issue with a 1800 series Cisco Router. Router get's Internet just fine, can ping Google, Microsoft, etc.. Router is connected to a switch, switch connects 2 workstations running Windows ...
5
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4answers
197 views

Packet Collison Avoidance

If a wireless network has collision avoidance, how comes the network slows down if more clients connect to it?
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1answer
60 views

How does a packet find its way from a LAN device to a router, or vice versus?

I am trying to understand how packets are sent from one device to another in a wireless network? (Perhaps the same question also applies to a wired network) How does a router know in which physical ...
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0answers
43 views

Internet not working [closed]

I have this types of network in my office. Recently we have moved to new i BSNL internet. My problem is when i bypass router and connect poe cable to computer internet is working but when i put ...
1
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1answer
296 views

Ip aliasing on cisco router [closed]

We have a D-Link router (DSL-2730R) with the "Alias Ip Address" feature. This enable a logical network from the primary IP. I want to do the same on the Router Cisco Rv-110w, ¿it's possible, what ...
4
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2answers
273 views

What is the best to simulate an RJ45 cable failure without changing switch configuration or removing the cable?

I am looking at an automation element for a training environment. We would like to be able to fail a cable without doing a shutdown on the interface or having an engineer physically remove the cable ...
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2answers
36 views

How to add hot swapping feature in network traffic? [closed]

Background: Assume I have PC1 communicate with PC2. Another PC3 connects (in serial) between PC1 and PC2 and inspects their network traffic (like a firewall hardware). If PC3 shut down for some ...
1
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1answer
32 views

Is it possible to view cameras that are on a different network? [closed]

I work in a manufacturing plant that has several cameras that we use in production. Our camera server just went down and I'm trying to find a way to still view the cameras till a new server can be put ...
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2answers
972 views

Unable to ping internet from switch

Router internet interface Fastethernet0/0 192.168.0.17 (ip nat outside) internal interface 192.168.1.1 (ip nat inside) able to ping 8.8.8.8 from router Interface IP-Address OK?...
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1answer
300 views

Why does traceroute gives different number of hops for different protocols used?

While exploring traceroute with different protocols, it gave me the following response: For TCP: user@200411DC0:~$ sudo traceroute -T facebook.com traceroute to facebook.com (157.240.16.35), 30 hops ...
3
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1answer
61 views

Why we use transmission system like sonet sdh

Hello friends i have one query that we can connect routers and switches directly on fiber and with high capacity why we uses transmission system like sonet,sdh and dwdm?
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0answers
115 views

Frequent Internet Disconnection [closed]

Hello everyone! I am relatively new to this forum, and wanted to get some useful feedbacks and resolution from "network-PROs" on my problem.. I have a network with a main router connected to the ...
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4answers
2k views

Can we run the Internet on circuit switching?

Generally we use IP and ATM for data communication and can we use circuit switching for data communication ? Can we use circuit switching for Internet ?
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1answer
1k views

What is a “back to back” firewall configuration?

I've found some guides talking about "back to back" (or back2back) configuration but I can't find an explanation of such configuration. Can somebody explain what is meant by "back-to-back"?
1
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1answer
80 views

Options for Company A server access to Company B network (on same premises)?

I'm looking for the best way to allow access to another company's server from within our network (We are both located on same physical site). At the moment Company B have limited infrastructure and ...
1
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1answer
58 views

Wireless Router Multihoming?

Here's the scenario: One outdoor equipment cabinet with seven different 100 Mbps carrier feeds Currently, no trailers are wired. The point of this is to avoid running cable to each trailer Seven ...
1
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2answers
5k views

Error control in Transport Layer vs Data Link Layer

I understand that under the TCP/IP Protocol Suite, error control, flow control and other such services are provided by both, the Transport Layer and the Data Link Layer. My doubt is specific to error ...
3
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2answers
5k views

SSL/TLS belongs to which OSI layer [duplicate]

Can someone please explain SSL/TLS belongs to which OSI layer. I have been looking through many sites and all of them have different options of Application, Presentation and Session.
0
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1answer
677 views

In an ESXi, how can VMs communicate if they are in different vlan? [closed]

I have an ESXi and create two vlan networks, vlan 10 and vlan 20. VM1 connect to vlan 10 and VM2 connect to vlan 20. How can the two VMs communicate?
7
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3answers
4k views

How is tcp/ip implemented

Well, first of all I am new to networking. And I have studied the layered structure of tcp/ip protocol stack. I know that the layered structure is an abstract model, but I didn't know how the ...
2
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2answers
120 views

What defines a “home address”/“home network”? (Computer Networking)

In Computer Networking, and in particular to WiFi-networks, we learn that a "mobile node" (i.e. any mobile unit that can access a router through WiFi) has a permanent IP-address (the "home address"), ...
3
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1answer
400 views

Cisco SG300 and Fortigate 90D integration

I need help in setting up my network, currently I have the following setup. All the computers can browse the internet but when I tried to create a two groups (a group that can access the internet and ...
0
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2answers
436 views

How to open VSD files in OSX using Google drive? [closed]

Networking administrator from another enterprise who use Juniper router's sent me a VSD file (I use OSX for programming objective-C, Swift, Qt/C++, BASH, terminal to connect my other linux boxes for ...
0
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1answer
70 views

How would I add 4 buildings to a WAN [closed]

As you can tell im new to networking. I have created this LAN template for one building. The other 3 building's topologies are similar. The buildings are located in the same city. https://gyazo.com/...
1
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1answer
42 views

How to check the network performance for smooth transferring of huge data?

We have cisco network setup and we often find that we are having issues while transferring huge amount of data between our database, Is it possible to check the network performance and any latency ...
3
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1answer
364 views

TCP layer behaviour upon receiving wrong sequence number

I have the IP and port details of an already established connection between the TCP server and the client. As I am simulating packet injection attack using the packETH tool, I disguise my self as the ...
3
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1answer
675 views

What is the difference between GPON ONU and ONT?

The Optical Network Unit (ONU) and the Optical Network Terminal (ONT) GEEPONs can both connect with an Optical Network Terminal (OLT) via fiber cables in order to achieve an Optical Distributed ...