Questions tagged [network]
For questions about Networking that includes design, and use of a network, the physical cabling, hub, bridge, switch, router, and so forth. Anything in relation to networking and its technologies.
843
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How to access a http port of modem on device eth0? [closed]
I have a modem connected to my raspberry pi eth0 port, and I'm sshing throuh wlan0. I added my own rule
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use ...
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11
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PTK and GTK where are they stored? [closed]
So I know for unicast traffic PTK is used to encrypt and obtain ciphertext; and for multicast traffic GTK is used to encrypt and obtain ciphertext. I know PTK is produced at a 4 way handshake, and ...
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6125XLG blade switch IRF configuration in c7000 chassis
I have HPE c7000 chassis with 612XLG switches. I am trying to setup IRF between blades switches. somehow i am not able to bring up irf-port interface.
In 6125XGL TE1/0/17-20 ports are internal ...
CommunityBot
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2
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How to connect HP 2930-8g to the cisco CBS350-8g switch unmanaged?
I want to Connect HP 2920-8g to CISCO CBS350-8g. I tried HP sfp ( J4859D ) in HP and CISCO working fine,
with HP and Cisco switch and cico sfp (MGBLX1) and programmed
switch(config)# allow-...
CommunityBot
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1
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should I go multiple switch or one big switch
So I have a 2.5Gbps NIC on my server PC, but my main questions are:
note: I'm using consumer grade switches
will a 2.5Gbps switch split the load with two 1 Gbps switch?
will the 1Gbps be better on ...
CommunityBot
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1
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What exactly is the ASPATH in data analyzed by BGPdump
I apologise in advance I don't specialize in computer networks, but my tutor gave me this urgent task to analyze some raw data obtained from RIPE.
So basically I find a tool recommended by RIPE on ...
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Network Design: Daisy Chaining vs One Centralized Switch
I am curious as to what the "standard" is when it comes to designing a network with the given constraints:\
cable runs would be more than what cat5e/6 would allow without a repeater\
one ...
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1
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Multiple GRE tunnels towards single host using anycast IP
I'm trying to build the following network architecture:
Where clients try to connect to a backend server (e.g. SSH) by using a Public Anycast IP adddress (1.2.3.4), that routes the client to the ...
CommunityBot
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ERR_ADDRESS_UNREACHABLE error intermittently [closed]
I have a website (greatsistema.com) for internal company use that we use from several locations. Intermittently at 1-2 branches (different locations) the site goes down with a ...
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Can an application on two separate devices share a packet to similar resource?
Can packets requested for an image by an app on a phone be sent to same app on another phone by another user?
CommunityBot
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2
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Difference between SDN and Network Automation
What is the difference between Software-Defined Networking and Network Automation?
If you are managing your routers and switches using tools like Puppet or Ansible, or by using bash scripts or python ...
CommunityBot
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I want to log into a nanostation m2 - ubiquiti but i cannot, i've changed my ip and i still can't access it even after restarting it, what can i do? [closed]
I tried to log into a nanostation m2 but i cannot, i've changed my ip and i still can't access it even after restarting it.
What can I do or where am I going wrong.
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Core Switches Redundancy Problem
I have network. I have three different networks and 2 vlans. PC0 is a member of vlan 10, PC1 is a member of vlan 20. One of the networks for vlan 10, another one is for vlan 20, third network is for ...
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Why when i connect to my laptop directly to core router no bandwidth receive [closed]
I have two ISPs, each with 500GBs of bandwidth. When I connect to ISP1 from my laptop, I receive an IP address and can run speed tests successfully. However, when the ISP is connected to the core ...
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How to check vlan interface traffic on Cisco nexus 9k
I have Cisco N9K-C9396PX L3 switch which has VLAN interface configured for my LAN gateway and i want to monitor how much traffic vlanXXX handling, I have configured SNMP monitoring to pull interface ...
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Cisco BGP RTBH in EVPN fabric
I have Cisco basic EVPN fabric configuration in DC with two spine and couple of leafs using OSFP+iBGP for underlay fabric. My border leaf connected to my ISP using Vrf CUST. I want to configure RTBH ...
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Cisco nexus C93180YC-EX sflow configuration
I am running cisco nexus C93180YC-EX switch and I would like to enable sflow for collector. I did similar config on 9396PX model and it works but Nexus 93180 is little different. I am running NXOS 9.3....
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Design of 2 Lans Connected to a Watchguard m570 firewall
I have this architecture (without the firewall). I bought a Watchguard M570 as Firewall to add it in my network. My Question is : Could i use my watchguard and connect this one to my 2 LoadBlancers ...
CommunityBot
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Recognizing the next protocol in MPLS header
How can I know what is the next protocol in MPLS header?
I do know that MPLS header does not provide any information about the next protocol,
But I somehow need to know how to recognize it, as I am ...
CommunityBot
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GSM and LTE-M connection with SIM7070G for MQTT data transmission
I am working on a tracker project using the SIM7070G modem from SIMCOM. The objective is to maximize the connection by working with both LTE-M and GSM, aiming to send location data via MQTT.
I have ...
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1
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How can I ensure that NAT hairpinning goes through the gateway?
When I enable NAT hairpinning, will accessing LAN devices through the public IP go through the public network?
After enabling NAT hairpinning and establishing a TCP connection, if the public IP ...
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Can anyone explain the introduction of Rapid Dual Homing to me?what is the main function of rapid dual homing?
I read some information about Rapid Dual Homing from JetNet 5020G,the figure below is the introduction of Rapid Dual Homing.
Honestly,i don't understand why can the rapid dual homing have multiple ...
CommunityBot
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3
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Is there a difference between NetID and Network Address?
So i know the gist of it. Thanks to the help here
Network Address i see as anything ending with 0
Example: 192.168.0.0
Broadcast Address i see as anything ending with 255
Example: 192.168.0.255
...
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1
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519
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Ping to default gateway failing
I am trying to ping to a default gateway which i have configured as 171.2.0.1 but somehow the ping is failing . I am new to network domain so i have less idea about it . Any help is appreciated .This ...
CommunityBot
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2
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Copper or Glass for Low Latency?
I'd like to preface the main content of this post with the following: I understand this question may be equally suited to the Physics Stack Exchange, and so I have posted on there as well, but maybe a ...
- 84.4k
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1
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Communicating Between Two Devices When One Lacks Internet Access
I am currently developing a software that needs to establish communication between two devices. Device 1 has internet capabilities, while device 2 may not always have internet access. I am ...
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2
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what information needs a router to make a decision?
How does a router that receives a packet know what to do if it doesn’t know the subnet mask of the IP that sent the packet? The reason for asking this is that I didn't see any field in the IP header ...
- 1,614
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396
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Multi LAN network does the main router to the internet need to be in its own subnet?
I have to design a network where there are 4 within which are different number of VLANs with varying number of hosts per VLAN depending on the building.
My confusion lays in the main router, does it ...
CommunityBot
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3
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How does a new switch know how to reach the controller in an SDN?
Let's say we have an existing SDN network composed of several switches and a controller. Now say we connected a new switch to the network. Now how would the new switch know how to reach the controller?...
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How can i optimize this network
I got a router on a stick and I want to optimize it by reducing its cost and also the configuration costs
This topology is to facilitate inter Vlan routing so Vlan1 can communicate with Vlan2. PC0 and ...
CommunityBot
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Option Field In TCP Header
In the tcp field option There are several options that can be added for example like mss But how if i don't use the SACK option, what kind of acknolegdment will I use cummulative?
CommunityBot
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How FDB (Filtering Database) is filled out
I would like to understand what is used as a VLAN column in the FDB. For ACCESS port it is PVID if frame untagged or frame VID if frame is tagged, for TRUNK it is allowed VLANs?
We can represent the ...
CommunityBot
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1
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Are WAN same as autonomous systems(AS)?
I am currently studying network+. I came across this question that are autonomous systems(AS) same as the WAN ?
or they are two things completely apart?
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What is optical network coding? which techniques are there?
in optical network, what is network coding and which techniques are? is modulation a techniques of network coding?
CommunityBot
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HP 6120XG switch LACP is blocked - error condition
Folks,
I am dealing with very strange issue related LACP and not sure if its bug of 6120XG switch or something else. so let me explain my issue here.
Network Diagram:
I have two Cisco Nexus 9396PX ...
CommunityBot
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1
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Reverse ARP In Data Link Layer
In the arp the Mac address is used as a broadcast address with a value FF:FF:FF:FF:FF:FF as the destination hardware address. But What about reverse ARP broadcast address? Which broadcast address ...
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What RFC standards That describe how network headers work at the bit level [duplicate]
I want to understand more deeply how network headers are constructed at the bit level based on byte ordering, but what standard RFC number explains this?
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Is there a way to gather data of Optical Module Status and the CPU Utilization through SNMP protocol?
When using the snmpwalk command to query a Cisco SF302-08PP switch with the -c public community string, am not able to find data related to Optical Module Status and CPU Utilization. I am trying to ...
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1
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425
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Understanding Header Structure in Binary
How headers are actually structured at the bit level let's take the TCP header as an example
|src port | dst port | Sequence Number
Then how are the three header fields actually structured at the bit ...
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1
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TCP Multiple Segment Acknolegdement
Let's take example where in the example i will use the Independent acknowledgment.
Host A has send segment 1,2,3 to the host B, after host b receive each segment it will send a Acknolegdement for each ...
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TCP Duplicate Acknowledgement
Host A and Host B has establish the connection, Host A will send a segment 1,2,3,4,5,6 but segment number 2 and 5 is lost. Then the receiver will sending an duplicate ACK to sender, so whenever sender ...
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1
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Reset Connection With RST Flag TCP
When a connection has been established between Host A and Host b, Then there is data exchange between host A and host b,Let's say host A already has 3 segments, segments 1 and 2 have been sent and ...
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1
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TCP Header Data Field
In TCP header there was a field called a data field which stores data, but does this field store the IPv4 header + datagram or just the datagram?
- 99.6k
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Layer 2 Encapsulation and Decapsulation in Router
Whenever the router receive a packet from the local network, router will decapsulate the frame to be able access the IP information, after router have done know which interface it will send the data ...
- 84.4k
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2
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Does MTU setting affect sending, receiving, or both?
Consider the two devices:
A: PC, NIC MTU is set to 1500
B: Router, MTU of relevant interface is 1478
Now if A sends a frame of length 1500 to B, something might go wrong. But what if I set A 's MTU to ...
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3
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Switches in chain topology for ~40 devices
I am currently looking at a network topology consisting of ~40 DUTs. In this network, there is no hierarchy (like access core and distribution), and all the switches are connected in chain topology. ...
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1
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39
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What happens when the sender sends more data then the advertised window by the receiver?
I am relatively new to networking. I am doubting what happens when the sender sends more data than the advertised window by the receiver. I mean that the receiver advertises the window size based of ...
- 84.4k
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Would a /24 public ip range typically be from the same country?
Would a /24 public ip range typically be from the same country? This to reduce the amount of ipstack requests, checking from what country an IP is. (due to bot requests)
- 84.4k
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TCP blocked until the acknowledgment received
I am currently facing an issue in my application where the TCP messages seem to be blocked until an acknowledgment received. Specifically, the subsequent messages wait for the acknowledgment of the ...
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2
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Setting up a local network with access to the internet through a wireless access point
Intro
At work we want to setup an 8 node raspberry pi cluster. The purpose of the cluster is to test different technologies and have a good time.
We cant manage the wifi at work and the only way we ...
