Questions tagged [router]

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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13 views

Can one access data generated in a Wi-Fi network from the modem? [on hold]

I find this question is best phrased with a scenario, so here goes nothing. Scenario Tom owns a modem and a router, and gets internet service from Comcast. Tom uses his router to broadcast his own ...
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1answer
29 views

SSID active but not connecting to internet [on hold]

I have a modem which is connected to a 24 port Ethernet switch, which intern is connected to a wifi router on different level of the building. It was working fine yesterday but I need to have ...
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3answers
834 views

OSPF LSA type 3

This is what I know about LSA types from what I've learnt. LSA type 1 is circulated inside an area and doesn't get to other areas. LSA type 3 is sent from one area(From backbone to non-backbone and ...
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13 views

Issue disabling DHCP and preserving Internet connection [on hold]

I have a problem with the router ASUS DSL-N16. Actually I want to pre-assign and IP to each device I have using the MAC of each device, no problem with this step. Now I put the IPv4, DNS and submask ...
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13 views

Hostname resolution on cisco packet tracer [on hold]

I was configuring hostname resolution with DNS server on cisco packet tracer. I created the records and assigned ip to them then I configured everything on Router with ip domain command but the ...
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14 views

CISCO Packet Tracer

Does Cisco Packet Tracer support config memory and config network command? If no, then do enterprise routers still support it?
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1answer
71 views

How does NAT ensure that every machine has a unique public IP?

I am trying to understand the distinction between public and private IP addresses in IPv4 networking. The picture I've been told has some problems with it, so I would like to present it here and ask ...
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2answers
66 views

How BGP guarantees same route for a forwarded packet?

In BGP all routers choose the best route to a single destination. So for Router A and destination D, A will forward the packet to the next-hop router (let us say router R) after knowing the best route ...
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0answers
17 views

How can I change my IPv4 address? [closed]

Specifically the one that shows up when visiting https://www.whatismyip.com/. It looks something like this: 75.37.58.xxx. I am using AT&T Uverse. I have tried unplugging the router overnight and ...
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1answer
36 views

How does a router settings page work? [closed]

When we enter the routers address 192.168.x.x into our browser we get a page containing the setting for the router. How does this page work ? Is the page stored in the router ?
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18 views

Lan Routing / Ping From Router to Subnet [closed]

i would like to setup a cascading Router setup as Follow : Router "A" with Internet on Wan , and Devices "A" on Lan . Another Router "B" which is a Device "A" on Router "A" Lan port . Router "B" wan ...
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1answer
25 views

How public key is given to user by Cisco Switch/Router while using SSH? [closed]

The command crypto key generate rsa generates public key and private key. But How public key is distributed to the client. Since the client only requires an IP address/domain name, username, and ...
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1answer
20 views

Question On Route Aggregation [duplicate]

Suppose I have these 3 IP Prefixes : 190.154.27.0/26 190.154.27.64/26 190.154.27.192/26 and I want find the aggregate prefix. I convert each address to its' binary equivalent: 10111110....
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1answer
9 views

Parameter Map vs IP SLA

What is the difference between parameter map and ip sla? In both we can specify that if threshold of something is crossed then a log is generated and based on that some action can be taken. Has one ...
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2answers
61 views

How does a router route traffic on a LAN, in detail?

Electrical engineer here trying to understand things. So I guess this might be simple or very complex, but how exactly does a router route traffic between say 2 PCs that are on a LAN? eg. PC-1 and PC-...
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1answer
21 views

Strict source routing using my own scattered PCs/ routers

I would like to completely control my network transportation by defining the packages path. According to this I can't do it unless I have control over all the PCs/ routers in its way. Suppose, I can ...
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1answer
38 views

how to factory reset ASR 1001-X

So I was setting up/testing this router. While using auto-secure during the auto-configuration. {Router#setup...} Once I get through auto setup and reloaded. I was not able to login. I did some ...
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1answer
30 views

Why doesn't traffic go through router on LAN? [duplicate]

So I thought that when two devices are connected to a router, and if they wanted to communicate with each other, then all the traffic will go through the router(AP). I tried running a traceroute and ...
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43 views

Limited bandwidth only when switch is connected to router

I have a very strange problem in my network. My computer is connected to a switch (Cisco SF300-08, 100Mbit). This switch is connected to a dual wan router (Cisco RV320, 1Gbit) and this router is ...
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1answer
40 views

Is there a way to determine my network transportation to specific path?

How can I determine my network transportation to specific path. I would like to determine that my data packages will go through specific routers.
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0answers
15 views

Why won't Cisco Catalyst 1760 Router enter rommon?

I have purchased a Cisco Catalyst 1760 Router. It has the password recovery turned off and there is no reset button. I am using ctrl+break in putty on windows to break and it has given me the question ...
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1answer
5k views

How do I delete all OSFP settings on a router?

I'm using packet tracer. I want to delete all OSPF setting on a router. I used clear ip osfp process but after that when I do show ip ospf I can still see the process, its area and all interfaces of ...
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1answer
50 views

How do VLANs Work? Some Basic Questions:

I've recently started looking into VLANs. I am a network novice so bear with me please:). I have a few questions regarding VLANs. I understand that certain managed switches allow you to create VLANs. ...
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2answers
62 views

Why are there so many more dual-band (2.4 & 5 GHz) Wi-Fi APs than single-band, 5GHz-only ones?

Why are so many more dual band (802.11n 2.4GHz & 802.11ac 5 GHz) APs than single-band, 5GHz-only ones? Is this for backwards compatibility?
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0answers
16 views

How to set up secondary home WiFi network [closed]

I have a Google WiFi Mesh system at home. It's powered by my Xfinity modem/router combo in which I disable the WiFi on. Everything works great. I have lightning-fast speeds across my entire house. ...
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3answers
68 views

Does a router send its own mac address or the mac address of the user?

When a request is made, does the router send its own mac address or the mac address of its user? Does it send the mac address at all? My specific case is the following: I am getting a 4g sim card to ...
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1answer
28 views

Does every router in public network knows all the other public interconnected networks in the world?

I am reading this article https://www.practicalnetworking.net/series/packet-traveling/host-to-host-through-a-router/ , trying to learn how a packet is delivered between different networks. It says: ...
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1answer
30 views

Hide SSID to block probe requests from clients

According to this Answer clients are sending probe requests to discover wifi networks. If I hide the SSID the AP wouldn't need to handle these probe requests and therefore the workload would be lower....
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2answers
19k views

The VPN connection failed due to unsuccessful domain name resolution

We are having trouble when test the VPN remote-access with the above error. It returned domain name successfully when we run nslookup "router_IP" in window CMD but it keeps prompting the error window ...
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2answers
47 views

Can a router route 2 switches with multiple vlans and subnets

Good afternoon/evening, Today on my Cisco Packet Tracer, I made two layer 2 switches and 2 PCs on each switch. I created a vlan 10 on the switches. I trunked the switches together so they can see ...
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2answers
680 views

How many pps (64Byte each) i can receive in 1Gbps throughput modem / firewall

I need help with this: If i have 1Gb/s throughput. I can receive how many pps in 64Byte each packet / s? Let's say I can send (Packet / Second - 64Byte) 450,000, meaning I would not only have 230.4 ...
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2answers
362 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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12 views

Why we need routers when there is layer 3 switches [duplicate]

I know that routers only do routing but layer 3 switches can do both switching and routing. my question is why we still need routers when we have layer 3 switches ?
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1answer
26 views

Modern routers: number of NICs, ports and mac addresses

I read that NICs in modern routers are responsible handling of multiple ports. Is it true to say that every port has a different MAC and IP address, and thus a NIC might have multiple different MAC ...
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1answer
44 views

Upgrading Cisco 819 to 809, can I connect devices to 2 routed ports and be on same subnet?

The company I work for has multiple remote "IoT" style sites connected back to the datacenter via a Cisco 819 cellular router. We are in the process of upgrading these to the newer Cisco IR809 routers ...
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2answers
39 views

Using 2 different ISP In case one dies

It's my first ever post in here and I hope not the last. I'm looking for some advice. I'm trying to reduce my internet downtime for a local network. My setup. Mix and match computer environment (...
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1answer
26 views

Router RIPv2 displaying subnets not directly connected

Is there a way to show subnets on "Show IP route" that aren't directly connected, but are a hop or 2 away? Is this with Router RIPv2 "redistribute" or is there another way? Thanks
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2answers
270 views

Router on a stick not connecting 2 different VLANs

I have a setup which requires two different VLANs to be able to ping one another. I have a setup with 2 - layer 2 switches and a router that has defined sub-interfaces, and for the life of me, I ...
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0answers
13 views

Small Network Router Recommendation [closed]

I'm looking for some thoughts from those of you with some expertise on small-network design. My home / business network consists of: Two 16 port switches (TP-Link TL-SG1016) One 8 port powered ...
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1answer
64 views

If you're behind a firewall and all the ports are blocked, how is your browser able to access the internet?

I'm behind a router and I'm able to run game servers on my home computer after forwarding ports or using the DMZ feature on the router. However, I still don't understand the underlying technology as ...
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1answer
53 views

Reasons for buying ASN for organisation that are located at single place

I see here that even some organisation/universities have bought ASN which are located at single location. What benefit they will get by buying ASN ? Is it compulsory to buy ASN if I have to buy some ...
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1answer
39 views

802.1ad (QinQ) and router

I am a little bit confused. Is router aware of VLAN tag? What happen when tagged frame comes to router? (without any extra setting like encapsulation) Or what happen when QinQ frame comes to router? ...
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1answer
32 views

What is benefit of allocating ASN to edge routers and not Ip addresses

What is benefit of allocating ASN to edge routers and not Ip addresses ? I mean we could have given these edge routers unique public ip addresses too ?
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5answers
41k views

Reset admin password on Fortinet FortiWiFi 60D

I've tried to log in to this device by doing the following. Default credentials username: admin password: <none> Maintainer credentials in the FortiExplorer console interface. username: ...
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1answer
48 views

I need help in creating OSPF between MultiLayerSwitch and Routers in packet tracer

I know we cannot create OSPF with different subnets. What network addresses should I put in the MLS and R1 to make it adjacent? Here's the configuration for MLS: interface FastEthernet0/15 no ...
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2answers
507 views

TCP connection dropped and each endpoint points at the other one as responsible of closing it

In my company we have a software system used to transmit thousands of files of different sizes through a WAN. Senders and receivers are in different countries or even continents, and most of the ...
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4answers
30k views

Difference between control plane, data plane and management plane?

I think I understand these concepts but I'm a little rusty. Can someone give a concise, easy-to-understand explanation of these concepts? The planes are logical concepts, correct? Is this a cisco only ...
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0answers
47 views

How to change Default Gateway on Hitron (Virgin Media) router?

Our office is having connection issues with Slack. Our internet provider is Virgin (UK) and the router is the Hitron CGNV4, and Virgin suggested that a reset using the button on the back of the router ...
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2answers
262 views

Why ip nat {in,out}side?

Although I understand how NAT is configured on Cisco, a broader question came up about the why behind it. When configuring e.g. NAT overload, you specify a few items: An access list ... ip access-...
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0answers
42 views

Trying to understand how SSH works [closed]

Hi I have a network diagram as shown in here both Router0 and Access Point0 have DHCP servers on It I am thinking about How to open SSH to my Access Point0 from Server0 , Only IP address I could get ...