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For questions about network routers, devices that forward data packets between computer networks, commonly at the network layer (layer 3) of the OSI model.

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Is it possible to multiply PPPOE ISP connection with LAN switch without using router? [on hold]

I don't have much knowledge about networking or networking devices. I hope I am not asking something too stupid. Recently I am facing a problem. My router circuit fried due to lightning storm. But I ...
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0answers
17 views

Can a webpage affect another device on the same network? [on hold]

The following just happened to me: While i was browsing a site on my pc i used my phone to google for something. Instead of showing the search results i was redirected to the same page that was open ...
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1answer
21 views

Network interface issues an ARP request to get the MAC address of an actively used gateway

My network interface actively uses a gateway to send IP packets to other networks. There is already an ARP entry in the cache for the IP/MAC association for the gateway. Is it normal that my network ...
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0answers
15 views

I can connect to the second router but no internet? [on hold]

Before I ask my initial question, I'll explain the setup and background. I am helping a business fix their internet after a camper reported that the internet had gone out. I went to check, and sure ...
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1answer
23 views

Create Accounting for Internet and merge ADSL, is there any way? [on hold]

I have 4 Simple Wireless ADSL Modem that 4MB, 8MB, 16MB, 40MB Internet BW. I have one HP Server with 4 Network Ethernet Ports. I have 7 LAN based PC's, 2 Network Printer and some wireless station ...
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0answers
19 views

Setting up a GPS TCP server [on hold]

I am working on a project where we are using a GSM modem with built in GPS system. The modem has setting to send GPS signal NMEA format to a remote TCP server. Can someone consult on where should i ...
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0answers
22 views

Is it better to connect your WAN to Switch or to Router? [on hold]

Which option is better? Connect your WAN directly to Switch , and then to router Connect your WAN directly to Router, and then to switch If you connect WAN to your Switch, you will be able to use ...
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1answer
21 views

Change firewall rules of a Cisco Router from network

I'm looking for ways, methods or workarounds to: Change firewall rules (WAN/LAN accept-deny) of a Router from networking, through Linux command or PHP script, can be a socket, or rest service, soap ...
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1answer
23 views

Cannot reach 4th hop, pc as router, static routing

I'm trying to set a PC as a Router and somehow it's not working correctly. I have following setting: CLIENT A 192.168.21.1/28 l l 192.168.21.5/28 ROUTER X 192.168.21.25/28 l l 192.168.21.17/28 CLIENT ...
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0answers
12 views

What is my internet speed? [closed]

First three days The speed in the Router "192.168.1.1" is 5 mbit all the time, and in speedtest.net is 5 mbit. After 3 days The speed in speedtest.net dropped to 4 mbit, but still 5 mbit in the ...
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22 views

Port 50000 UDP not passing traffic in cisco 1921/K9

I have two devices that use UDP on Port 50000 these are on vlan 103 they are IP's .222 and .223 trunked to an HP switch I have tried several ACL's but no luck, router config is as follows, Building ...
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3answers
156 views

How do I Connect 4 Router with 1 Switches?

Few days ago, I got an challenge from my Senior at my workplace. Here's the representation of the topology that he gave to me : The question is, how I make each pc could ping each other? I tried IGRP ...
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2answers
41 views

Why router interface need IP addresses while IP is constant during the journey?

A beginner question, I've recently read in Cisco CCNA R&S 200-125 official cert guide that the packet leaves the PC with a destination IP of PC2 (the target) but with the MAC of PC2 in case of PC2 ...
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1answer
33 views

Subinterfaces at Cisco routers

What is behavior of subinterface on cisco router that has configured #encapsulation dot1q vlan_id but has no IP address configured? Will it work as L2 interface? Or will not work at all?
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1answer
22 views

Can cisco router interfaces be configured to be L2 interfaces?

Can cisco router interfaces be configured to be L2 interfaces? Like #no switchport command turns L2 port to L3 port at cisco switches?
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3answers
53 views

How are the bits of packets not mixed together in queues in store and forward routers?

From what I understand, store and forward works on the principle of storing bits of packets until the whole packet is received and then transmitting them. Also, bits are made to wait in a queue before ...
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0answers
36 views

traffic of AF41 marking under interface

I have used port-queue commands most of the time to check traffic status under BE, EF, AF4. But I haven't found command to check for AF41 to AF42 on Huawei VRP or cisco IOS. How can check traffic of ...
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1answer
29 views

Help with this acl

This is what i am trying to do Deny the network that host 200.200.200.10 is on, telnet access to R3 Permit host 200.200.200.10 to telnet to R3 Deny host 200.200.200.10 all access to host 204.10 on ...
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3answers
71 views

How do routers intercept packets?

I'm trying to learn about iptables and port forwarding and I'm running into a very simple hurdle. If my understanding is correct, this concept applies when there is a local area network, a router, and ...
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0answers
25 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 ...
2
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1answer
43 views

Monitor VyOS Router

I'm actually using VyOS 1.1.8 an i wan't to collect the eth0 interface traffic to send it to a centralized syslog server. The thing is that i want to have the net traffic in some format like squid ...
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2answers
603 views

routing between vlans not working

I need to put a Cisco router behind an ISP router. (The ISP doesn't allow us to use their modem only.) I've called the ISP technical service and they've set up the connection with me. Their router ...
4
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1answer
516 views

Do we send ack frames in ethernet? if not then how does a router know if its neighbors are down or not?

So first off, do ethernet sends ack frames or not? if it doesn't : then how does a router know whether its neighbors are down or not? if it does : then is it cumulative ack with an ack timer or one ...
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2answers
3k views

Is the MTU of Ethernet still 1500 Bytes?

So basically do the modern routers in the internet still use 1500 as the MTU of Ethernet? or the 1500 Byte was for the old days? What I'm asking here is what is the MTU of Ethernet in modern Networks?...
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2answers
383 views

Cisco Router (ISR4221) Throughput - Why so slow?

I'm looking for a new router for a new branch of hour company. I got experience with cisco L2 & L3 Switches but not that much with Routers. I was looking at the ISR4000 series, specifically the ...
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2answers
78 views

load balancing with multiple ISP, one router and asa 5520

I connected different two ISPs to the RV340 with dual WAN support. I want to connect the ISP - Router - ASA in the normal way, and connect the L2 Switch after the ASA. I need to know how to do DHCP ...
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3answers
57 views

Pinging computer on a local wireless network, what exactly happens?

I'm trying to get a better understanding of networking in general. Here's one of the many questions I got: What exactly happens (network wise) when I ping 192.168.0.5 from 192.168.0.3, when both are ...
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2answers
64 views

Routing beetween two hosts [closed]

In a virtual network, I have two hosts,let's call : A and B with ip addresses of 10.0.0.1 and 10.0.0.4. Beetween the hosts there is a router with two different network cards,and two different ip ...
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1answer
44 views

Cisco: Router can ping Internet, Clients cannot

I'm currently playing around with a Cisco 819 LTE-integrated (C819G-4G-G-K9) router at my summer place to get a better LTE-signal and control that the ISP router provides me. Currently I'm stuck at ...
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2answers
63 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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0answers
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Is possible to access BT Hub from local network (behind another router) or remotely?

Setup: Internet access point: BT Business Hub 5 -> office router/firewall (draytek vigor 2830 router with build in firewall, standard setup) -> local network Problem: Access to BT Hub from local ...
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0answers
18 views

SSH into device attached to another router [closed]

I saw this questionwhich looks kind of related, but I'm not sure as the answers are too confusing. Basically, I want to SSH into my Raspberry Pi from my laptop. Eventually I want to have the Pi ...
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0answers
9 views

Linking an Actiontec router and a Synology router [closed]

My Verizon FiOS connection is an old one, using COAX cable from the ONT to a Verizon-provided Actiontec M1424WR Rev I Router. I just ordered a Synology RT2600AC router which, I have been informed, ...
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3answers
240 views

Difference between router and gateway

What is the exact difference between router and gateway? In Network configuration we set the gateway ip address, but in reality we call the device configured with that ip address as router?
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2answers
88 views

How do I automate ssh sessions with a Router Ericsson IPOS?

I am trying to automate the healthcheck process of a router by running a centralised script from a linux server. I am so far able to access the router server without password prompt using ssh and rsa ...
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1answer
18 views

Sys Routing Table Router: Destination IP, Gateway IP and Public IP are different, something unusual? [closed]

I am currently studying my home network router Sys Routing Table and attempting to resolve WHY my Public IP (assigned by my ISP), Gateway IP (WAN) and Destination Network (WAN) are all different. I ...
0
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1answer
49 views

Load balancing between two routers [closed]

I have the following network: On LAN A, I have several hosts connected with two routers to LAN B. My goal is to use R1 and R2 to route traffic to LAN B/R3. For that, there are two solutions: 50% of ...
0
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1answer
29 views

Router - can I remotely force a router to send my packets through a specific route? (in packet/network layer) [closed]

I'm a newbie in network programming in C/C++ and I'm working on raw sockets to program a simple ping or traceroute application as they are written in common network programming books. Programs like ...
2
votes
1answer
109 views

At which layer does router operate?

I have studied from various sources that router is a layer 3 device. It does routing based on Network layer (layer 3) header, but I have a doubt. Network address translation (NAT) is a feature of ...
0
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1answer
59 views

How to authenticate logins to Ericsson(IPSO) routers without password from shell server

I am very new at networks. I am attempting to automate the health check process of a system network from the main server being a shell OS. I have been successful for some network nodes which are ...
0
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1answer
77 views

Which MAC should be used: device MAC or Interface MAC?

My L3 switch has ~30 interfaces. If you look at the output below there are two MAC addresses showing in the results of the show interface command. The hardware address is the same for all interfaces. ...
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1answer
41 views

Router IP between networks of different classes

I have 2 networks that I want to ping each other, one of the networks uses class B 172.16.16.0/19 and the other network is class C 192.168.0.0/26. Both networks have their own subnets and vlans, and ...
3
votes
1answer
55 views

Multiple access lists on same vlan

I have 5 departments each with it's own vlan and i want some of them to ping some of them, and only want some of them to ping some of them back. Basically creating a hierarchy of vlans. Concretely, ...
3
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1answer
66 views

Access lists on vlans possible?

I have a building with some departments and each department has it's own vlan and subnet. so now all departments can communicate with each other, but i only want some of them to communicate with some. ...
3
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1answer
46 views

How do I permit only specific types of ICMP unreachable packets to be sent out from a Cisco IOS router? [closed]

I have a Cisco IOS router and want to permit only types of ICMP packets to be sent (type 8, code 0 and type 3, code 4). I tried putting an outbound ACL on the interface connecting to the Internet, but ...
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3answers
342 views

What are the reasons for seeing an incomplete ARP?

As was mentioned in this post: The reason for seeing an incomplete ARP is that "An ARP request was sent for that address, but the host with that address is not up and running on the LAN, so there is ...
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1answer
55 views

HP MSR2004 router is not processing udp through nat

I set up a new HP MSR2004 router for a corporate network. The network uses an internal private net and has one static public ip address. Surfing the web and all tcp related things seem to work fine. ...
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0answers
80 views

Slow performance with Cisco Comcast Business router with static IP address

20I have a server with a static IP address connected to a Comcast Business router (Cisco DPC3941B). I also have a second machine directly connected to the same router. It gets assigned a NAT address ...
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4answers
125 views

What is the purpose of 3 or more LAN ports on routers?

what is the typical purpose of 3 LAN ports on a router ? What kind of usage require more than 3 ports ? Are LAN ports on routers similar to the capability of a managed switch ?
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19 views

Certificate Path Validation in PKI

I've been trying to learn PKI and making various scenarios to understand the concepts properly. I considered a scenario with multiple sub CA and one trusted root CA. So, one thing that i can't figure ...