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Questions tagged [networking]

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

-4
votes
0answers
11 views

Find First and Last address in subnet 500 [on hold]

I need the 499th subnet first and last address Granted Block: 16.0.0.0/8
0
votes
0answers
12 views

What is the port used for router configuration [on hold]

I am trying to get my router to be able to be configured via internet. So I configure the DDNS and I have done filling the forms. But I heard that you need to set the port forward too, the problem is ...
0
votes
0answers
8 views

Unable to access Mitel PBX on different VLAN after switching to Sonicwall [on hold]

On our network we have 2 VLANs 10.0.0.0 for DATA 10.0.10.0 for VOIP The vlans are configured on a HP Procurve 2610 switch. Previously we had a Draytek router and on it was a routing table for the ...
3
votes
2answers
650 views

what is leasing an ipv4 block?

When you lease an ipv4 block what do you actually get? How do you get access to the ip adresses? Is any special equipment required or is it as simple as renting a server?
0
votes
1answer
26 views

Importance of DHCP option 12, client host name

The main purpose of a DHCP server is to provide dynamic configuration for a group of hosts (mainly IP, Gateway and DNS). There are several options that can also be sent. Option 12 (client hostname), ...
0
votes
0answers
20 views

Problem in NAT Outside configuration [closed]

im learning networking in my course. i followed NAT course in this site NAT PROBLEM . i did the setup as in the diagram then setup the NAT on R2 as mentioned in the page. I didn't do routing because ...
0
votes
0answers
16 views

Strange network behaviour [closed]

I have following problem: In my company we have for our department a own subnet which is build as folloing: Company router --- ipfire --- [NAS (which handels DHCP), Storage Server, ...] The ...
1
vote
0answers
49 views

Help with network setup issue (small network)

I am trying to set up a new network for a small business, and I can’t figure out what I have misconfigured. Hoping someone can provide me with some ideas. I have 6 VLANs set up. 10.10.10.0/24, 10....
1
vote
0answers
27 views

What should DevOps engeneer/SRE know about networking? [closed]

What should DevOps engeneer/SRE know about networking? Which tools\protocols\technologies? Beside different cloud-specific knowledge about network constructions and limitations.
0
votes
1answer
25 views

Can not add a Physical port into LAG

Using SuperMicro network module, which related to Intel SDN product, the command PDF . and the Web GUI manual. there I have qe57, qe61, qe65, qe69 four upstream ports, I want to aggregate them to one ...
0
votes
1answer
42 views

How to get MAC address on same sub-network without IP [closed]

Currently I am working on a research project, let's say we have two computers connected over LAN cable directly with out any switch or router in same sub-network. Both nodes not have IP address ...
0
votes
1answer
37 views

How to aggregate four upstream ports in the network module?

Using SuperMicro network module, which related to Intel SDN product, the command PDF . and the Web GUI manual. there I have qe57, qe61, qe65, qe69 four upstream ports, I want to aggregate them. how ...
0
votes
0answers
22 views

How to set the network module port to trunk?

I use the SuperMicro network module, which use Intel SDN product, the command PDF . and the Web GUI manual. Now, I want to make the qe57 port to a trunk mode, but I don't find a command to set. 192....
0
votes
1answer
23 views

What's the usage of `Data center bridging`?

show dcb app show clock Privileged Mode # Displays DCB (Data center bridging) application data. Command Syntax Command Modes Syntax Description Command Default Examples show dcb app {local status|map}|...
0
votes
1answer
14 views

Cisco ASA 5506 log collection after power cycle

Today we had to power cycle our Cisco ASA 5506 , since I could not connect to it through any of the connected interfaces. How can I get the logs to see what failed or what was the state of the ASA ...
2
votes
0answers
29 views

Can I do Q-in-Q vlans between Dell and Cisco switch

Our Head Office is connected to our DR location between an L2 tunnel provided by our ISP. I need to establish a Q-in-Q setup between both sides to pass multiple VLANs through. Our head office has a ...
2
votes
1answer
74 views

How to secure an aging PC from the switch/router side?

I have an aging Windows XP PC whose purpose is to feed code to a manufacturing machine via a RS-232 connection using machine-specific software. The PC needs to retrieve its code from a network file ...
1
vote
1answer
27 views

ISP Failover On A Converged Network

We have our fiber providor as our primary ISP. We have comcast as our secondary ISP and our Voip providor. We can setup the failover between the two ISPs. We also have 19 voip phones that are on a ...
1
vote
1answer
30 views

Half duplex setting switch forwarding frame collides with host forwarding frame

So my question is regarding half duplex switches connected to hosts. Consider a case where a switch is connected to a host by a single link. In an event where a switch decides to forward a frame to ...
1
vote
1answer
85 views

PVST + MST + RSTP network. Possible to make it work?

I have got a network (around 100 switches) which looks like this: Cisco 2960 - can do PVST, RSTP, MST MRV mr2228-s2c - can do STA, MSTP HP 1810 - can do RSTP, STP Two main Ciscos are linked with ...
3
votes
1answer
221 views

How to connect 192.168.1.x network to 192.168.100.x gateway?

Hello fellow networkers. I am very new to this world and don't know a great deal about IP addresses and subnetting. I however stumbled upon quite a big problem (for me at least - haha) My entire ...
1
vote
2answers
54 views

Is a networking loop considered a DoS attack?

Is a networking loop considered a DoS attack? I watched this tutorial and at 1:20: The author says that a network loop, could be a DoS in a network?
2
votes
0answers
45 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 ...
0
votes
1answer
53 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 ...
1
vote
1answer
24 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 ...
3
votes
1answer
100 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 ...
0
votes
1answer
73 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 (...
1
vote
1answer
18 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 ...
8
votes
5answers
2k 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 ...
1
vote
3answers
153 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
votes
1answer
137 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 ...
0
votes
1answer
27 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
votes
1answer
39 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, ...
0
votes
1answer
48 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 ...
0
votes
1answer
219 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 ...
1
vote
1answer
30 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: ...
1
vote
0answers
44 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
votes
1answer
36 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
votes
1answer
36 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
vote
1answer
39 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
votes
1answer
78 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
votes
1answer
38 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 ...
1
vote
2answers
43 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
votes
1answer
34 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 ...
3
votes
1answer
31 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
votes
2answers
42 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
votes
4answers
180 views

Packet Collison Avoidance

If a wireless network has collision avoidance, how comes the network slows down if more clients connect to it?
1
vote
1answer
43 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 ...
1
vote
0answers
30 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
vote
1answer
91 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 ...