Network Engineering

AUGUST 16, 2024

I have a problem, that I cannot bring together working PAT and Port forwarding on a Cisco router. with destination port 1234 and destination ip address 192.168.1.2 and destination port 5678 out of f0/0. and destination port 5678, here be careful, then with source ip address of f0/0 192.168.2.1. 1234 192.168.2.2

Port 130

Port Routers IP Address Topology 130

Network Engineering

MAY 25, 2021

I would like to forward internet traffic on a specific port to VLAN30 on our network for our security cameras. The port on my switch is set to Untagged 30 and the port on the RV134W is set to Tagged 1 (Default VLAN). I have a Cisco RV134W VDSL gateway connected to a D-LINK DGS-1210-28 switch. What am I doing wrong?

Port 130

Port IP Address Gateway Internet 130

Network Engineering

JANUARY 10, 2025

I would think blocking traffic from coming in from some of Xbox's most used ports sounds wrong, but I am a complete noob here. These were the default router settings set up by my isp, and I am wondering if anything should be changed. Thank you for your time and any help!

Port 130

Port Routers 130

Network Engineering

APRIL 10, 2025

The other sentence in there drove me totally nuts: For an ingress sFlow sample of multicast packets, the out port is reported as multiple ports with the exact number of egress ports. Cycle the sflow monitoring port. which I tried. This is not supported on Cisco Nexus 9300-EX and -FX/P platform switches.

Port 130

Port Unicast Network Networking 130

Network Engineering

JANUARY 28, 2025

Can someone help me understand if the ports on ASR 920 / CSR 540 series devices support the error Disable command ? I want to prevent the ports from going into a Err Disabled state due to flapping in the L1 link - normally Cisco equipment has a setting - but I cannot find it for these models.

Port 130

Port 130

Network Engineering

MARCH 10, 2025

Objective: Connect the HGU to port 1 on the OpenWRT router. Use port 4 on the OpenWRT router for the work network, isolated from the home network. Current Configuration: VLAN Setup: VLAN 1: Port 1 (connected to HGU) is untagged. VLAN 2: Port 4 is untagged, CPU (eth0) is tagged. It's set to 192.168.2.1

Internet 130

Internet Port DNS Network 130

Network Engineering

JANUARY 5, 2025

Imagine that for some reason we need to set up port forwarding between two hosts from all different continents (a total of three hosts, named A lice, P roxy, and B ob). My current conclusion is: L3 is better for local scenario (like localhost or Intranet) while L7 is for Internet.

Port 130

Port Internet Intranet Protocol 130

Network Engineering

APRIL 16, 2019

Is it possible to use a single interface as both the provider port and the customer port for a QinQ setup on a Juniper EX 4200 switch? I want to use this ae0 to take in a number of C-VLANS (10,20,30) but then encapsulate them as the S-VLAN (1000) and send the newly minted S-VLAN packets back out port 1000. Is it possible?

Port 130

Port Network Networking 130

Network Engineering

MARCH 14, 2025

Mbits/sec receiver And this is the result between Laptop and Client: Connecting to host [REDACTED], port 5201 Reverse mode, remote host [REDACTED] is sending [ 5] local [REDACTED] port 37536 connected to [REDACTED] port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 454 KBytes 3.72 Mbits/sec [ 5] 1.00-2.00

Server 130

Server VPN Port Network 130

Network Engineering

JUNE 12, 2020

After we made the "big switch", the pfSense interface was responding on [link] , this is not intended as we want to use [link] (port 443) for our web server. For this reason i changed the pfSense port from 443 to 444 which "solved" this issue as port 443 is "free" for other services now. 30 WAN1GW GATEWAY WAN1GW wan 84.1.1.2

Port 130

Port Gateway Firewall WAN 130

Network Engineering

JUNE 30, 2023

I am trying to get a thorough understanding of what does happen when a switch is connected to a portfast port on another switch that is part of a stable STP network in case of: 1- the port has no bpduguard. 2- the port has the bpduguard enabled. However, how is that better than reverting the port back to STP?

Port 130

Port Internet Network Networking 130

Network Engineering

MARCH 27, 2025

Besides port-forwarding, is it possible to configure Deco hub to relay these ssh packets to Comcast router network? Comcast router network Lan IP ranges 10.0.0.XXX XXX Deco Mesh hub gets IP 10.0.0.12 from Comcast router (connected via ethernet) Deco Mesh hub own Lan IP ranges 192.168.0.XXX from Deco Hub. from Comcast router.

LAN 130

LAN Routers Ethernet Port 130

Network Engineering

JANUARY 23, 2025

is fine if the lan port is opened but when the lan port is off it doesn't open router setup page? I have a mobile phone (Realme c55) which support otg.I have a Ethernet to typec device that let me connect to the router without password.It

LAN 130

LAN Routers Ethernet Port 130

Network Engineering

APRIL 25, 2025

But the switch OS that it has doesn't allow me to enable/disable the switch ports. I have recently been tasked to operate a Dell switch and I have to shut down an interface connected to a server.

Port 130

Port Server 130

Network Engineering

AUGUST 24, 2021

How can I achieve reachability from vlan terminated on the L3 switch to routed port on the router, FW? int vlan 10,50 are the SVI's on L3 switch vlan 10 - 10.0.10.254 /24 vlan 50 - 10.0.50.254 /24 vlan 50 is the native vlan on trunk link towards (router, FW) Routed port is configured on the physical interface with 10.0.50.1/24

Routers 130

Routers Port IP Address Media 130

Network Engineering

FEBRUARY 22, 2025

I have three video streaming cards connected to Cisco 9300 ( I have two cisco stacked together) On Cisco the card connected on ports: 34 + 35 + 36 the cards are small cards, I think they have micro processor ( no OS ) , I configure the cards through the web page.

Port 130

Port Network Networking 130

Network Engineering

JANUARY 22, 2025

But how do you connect leaf switches that are beyond the number of ports spine switch has? What if there are more leaf than the ports in spine switch? How to connect 100k+ Nvidia GPUs with all spine switches? I am not able to understand this. Typical resource on the internet shows spine and leaf architecture like below.

Port 130

Port Data Centers Internet Network 130

Kentik

JANUARY 19, 2021

In this post, we’ll talk about one of the most popular means of network observation: port mirroring. We’ll dive into what it is, how it works, what it’s good at, and the drawbacks as well as best practices in using port mirroring. What Is Port Mirroring? The concept behind port mirroring is quite simple.

Port 87

Port Network Networking Topology 87

DCNN Magazine

MARCH 4, 2025

times) increase in 100G capacity and an 864-port boost in 400G capacity per rack space, with a 43% reduction in watts/gig power consumption through ground-breaking silicon innovation. The PTX10008 router delivers 115.2Tbps capacity within a compact 13-U footprint and is 800G-ready to meet future demands.

5G 125

5G Routers B2B Energy 125

Network Engineering

MARCH 14, 2025

Since the port on the access panel works, why is poe not working? My assumption is the cable is fine since networking is good, and I tested it with a scout pro, all is good with the cable. The switch has not had anything new added to it, so no new power drain. What could it be?

Port 130

Port Network Networking Ethernet 130

Network Engineering

FEBRUARY 11, 2025

The idea is it have a mobile accessible application that would allow terminal access to switches and also "quick configure" options that would allow you to press like "create vlan" and it would prompt you to put the number you want to assign it, name, description, and what ports you would like that to run on.

Network 130

Network Networking Port Application 130

Network Engineering

FEBRUARY 6, 2025

My confusion lies in the following: The writers say that routing protocols such as OSPF and RIP use the network layer in order to exchange messages and I quote "Routers send RIP request and response messages to each other over UDP using port number 520. The UDP segment is carried between routers in a standard IP data- gram.

Protocol 130

Protocol Network Networking Routers 130

Network Engineering

MARCH 18, 2025

I have a network which is a router connected to a switch which has some LAN ports where PCs are conected and 2 APs. I am pretty new to the topic of networking so I hope I can explain the issue properly. I habe created the VLANs 20 and 39 however, when I create the network and asign the VLAN eg. I cannot log into the WLAN anymore.

LAN 130

LAN Port Routers Network 130

Network Engineering

FEBRUARY 20, 2025

The network Ip address were giving out multiple hits to a client's API so they had a WAF which blocked all IP address which affected our customer support's job Trials: We have tried creating a new user profile and configured the interface for Port 1 - ACT lease line alone and tried changing weights of the IP address and checked if it works or not.

IP Address 130

IP Address Firewall VPN Port 130

Network Engineering

FEBRUARY 28, 2025

I am working 2 cisco firepower 1120 firewalls, which are connected to a 5-port layer-2 switch through their "outside"(Ethernet1/1) interfaces, each with an IP address of the form 192.168.1.x x with a subnet mask of 255.255.255.0. On that same switch, I have a computer with the same IP format of 192.168.1.x, x, 255.255.255.0,

Firewall 130

Firewall IP Address Gateway Port 130

Network Engineering

MARCH 14, 2025

I was thinking about two possible approaches: Mirror RX traffic on a server-side switch port and redirect it to another device running packet sniffer.

TCP 130

TCP IP Address Server Internet 130

Network Engineering

MARCH 10, 2025

My laptop has no ethernet ports. [link] I have tried using netsh on Windows but it only gives signal as a percentage: "netsh wlan show interfaces" I need the value to determine whether my bad Wi-Fi is from interference when connecting to my access point. My signal strength is good.

Access Point 130

Access Point Ethernet Wireless Port 130

Network Engineering

OCTOBER 11, 2023

I have a router with multiple L3 sub-interfaces. On the other side I have a L3 switch (Nexus 9K) that I'd like to have multiple hosts that are on the switch route their traffic to one of the router sub-intf's.

Routers 130

Routers Port Gateway 130

Juniper

FEBRUARY 12, 2025

Marvis Actions for wired provides network operators with proactive recommendations for potential issues in your wired network, including things like missing VLANs, DHCP failure scopes, wired authentication failures, bad cables, port negotiation mismatches, persistently failing clients, L2 loop detection, misconfigured ports, and traffic loops.

Port 115

Port Ethernet Network Networking 115

Network Engineering

APRIL 15, 2025

Some additional weirdness from testing: When connecting via the VPN IP of the remote server, 10Gb performance improves slightly (25MB/s vs 15MB/s), but is still worse than 1Gb When I use Cyberduck (SFTP over port 22) to connect to the same my.remote.server , I consistently get expected speeds (50+MB/s) Things Ive tried: sshhpn enabled on both client (..)

WAN 130

WAN Server LAN Ethernet 130

The Network DNA

JUNE 19, 2024

CCNA: TCP Sequence & Port Number This article can be read as the second part of the previous article CCNA: 3-Way Handshake where we discussed what makes TCP a reliable protocol for transmitting information. Lets discuss the TCP SEQ and Port numbers in this article. These applications are identified using the port numbers.

Port 52

Port TCP Ethernet LAN 52

Network Engineering

JANUARY 31, 2025

However, I took it out of the closet to change some bios settings, and plugged it into the wall port, which is connected to the C3000Z. Once configured, it worked fine, except the performance was poor. I had assumed the integrated ethernet was 100BaseT. Shortly, I was made aware that one of my TV's was no longer connecting to the internet.

Routers 130

Routers Internet Server Wireless 130

Network Engineering

JUNE 27, 2023

I'm currently facing a network issue between Cisco Nexus 93108 (9.3.11) on an LACP port-channel configuration. Min-links not met -- Group Port- Type Protocol Member Ports Channel -- 100 Po100(SU) Eth NONE Eth1/13(P) Now, if we have a look about lacp counters, from both side there's LACPDUs sent, but 0 received from each way.

Port 130

Port Protocol LAN Topology 130

Docker Blog

JANUARY 8, 2025

app/ # Expose the Django port EXPOSE 8000 # Run Djangos development server CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"] EXPOSE and CMD : Expose the Django server port and define the startup command. '), 'PORT': os.getenv('DATABASE_PORT', 5432), } } 2.

Port 260

Port Application Server Government 260

Network Engineering

JANUARY 1, 2025

Objectives Install FreeRADIUS on CentOS(steam 9) to perform Cisco device authentication Perform dot1x authentication on all ports of the switch Perform authentication by connecting a laptop to the switch CentOS(203.230.7.2) - Cisco 2960 Switch(203.230.7.254) - Cisco 2800 Series Router(gig0/0 : 203.230.7.1, 255.255.255.0 255.255.255.0

Port 130

Port Routers Firewall Server 130

Network Engineering

NOVEMBER 27, 2023

I want to stress all ports on a SN3700 switch with iPerf. I want to force the traffic to go through each port, so port 1 to port 2, port 2 to port 3, port 3 to port 4, etc. I have a support unit, Unit 1, connected to port 1, and a support unit, Unit 2, connected to port 32.

Port 130

Port Network Interface Server Network 130

The Network DNA

JUNE 28, 2024

Introduction to Micro-BFD ( BFD over Port channel) Micro BFD sessions are those that run on member links of the port channel. Micro BFD sessions are available for both LACP and non-LACP-based port channels. This approach provides faster failure detection because BFD sessions are formed on individual port-channel interfaces.

Port 52

Port IP Address WAN Bandwidth 52