Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.

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.

Filter by
Sorted by
Tagged with
0
votes
1answer
6 views

How to differentiate if a Cisco device is a L3 switch or a Router?

I need to check all the L3 switches if they are configured with same ospf ID, As i am doing it in the Cisco prime, there are routers in the inventory too. Is there a show command where i can clearly ...
0
votes
1answer
7 views

How to check the route table on a neighboring router?

I have a router in a network, which use to show list of routes in the route table. Using the command- show ip eigrp topology I see some of the routes are removed after sometime, which were advertised ...
0
votes
0answers
9 views

how does a program detect an ethernet switch change? [on hold]

I am trying to change an ethernet switch on a system.I configured the switch to match the network settings and The network seems to work and data is still transmitted between the other devices via the ...
0
votes
0answers
19 views

Public IP address assigned instead of DHCP ip range address [closed]

I'm using a second router to connect to my main router to create a new wireless SSID. Here's my current setup: First router/main router - Generic branded router is provided by ISP and connected to ...
0
votes
0answers
34 views

Which routers do ISPs use to route data? [closed]

I'm not entirely sure whether I should ask this question here (honestly this was the only place that came in mind) but I'll try nevertheless. I couldn't find a concise website which would explain me ...
0
votes
0answers
15 views

DIY WiFi ap antenna [closed]

I'm looking for some help, i have the isp router inside of the living room and my laptop in my bedroom, the problem is that with the stock router antennas the wifi signal is very poor ant it doesn't ...
1
vote
1answer
38 views

Packet analyze on router does not match client and server

thank you for your time. My (virtual) network has 3 objects : a client, a server and a router between them. I'm sniffing the traffic on the 3 machine with the command tcpdump -i any -s 0 -w [path] ...
0
votes
1answer
48 views

Is 1111::/64 a valid IPv6 address?

As per the rules for shortening IPV6 address given in https://networklessons.com/ipv6/shortening-ipv6-addresses, this IPV6 address is invalid. But still this address gets accepted when configuring a ...
0
votes
1answer
30 views

Does Network segmentation work using different switches connecting to router?

I just learnt basic networking. If I have 2 departments which I do not want them to access each other's networks, does using two layer 2 switches connecting to the router does the job or do I need a ...
0
votes
1answer
40 views

Cisco ASA and a Router?

I'm trying to understand networking and when looking at the different routers, firewalls and switches, I came across Cisco ASA. I've read that these can be used as firewalls and routers but others say ...
0
votes
1answer
32 views

LAN to WAN IPv4 address mapped to LAN server through NAT Rules or other

I need to set a rule that allows me to connect BOTH from OUTSIDE the LAN (from the "internet" to the Internal server at IPv4 address 10.64.0.50 via port 22, by running ssh://1.2.3.4 -p 22; AND From ...
0
votes
3answers
36 views

packet filtering using bridge vs router

I have a question about the bridge vs router packet filtering using firewalls. I know the basics of the router and bridge and on which layers they work. I just wanna know that on bridge how does ...
2
votes
2answers
138 views

How does aggregate routes behave in BGP?

If a router received two BGP updates for the same prefix and both these updates are aggregate paths how do the router decide which one to take? Let us say that it needs to decide based on AS Path ...
0
votes
0answers
20 views

CISCO Packet Tracer

Does Cisco Packet Tracer support config memory and config network command? If no, then do enterprise routers still support it?
0
votes
1answer
92 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 ...
0
votes
2answers
78 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 ...
-1
votes
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 ?
0
votes
1answer
22 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....
0
votes
1answer
11 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 ...
0
votes
2answers
65 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-...
0
votes
1answer
23 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 ...
0
votes
1answer
83 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 ...
0
votes
1answer
31 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 ...
0
votes
0answers
44 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 ...
0
votes
1answer
41 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.
0
votes
0answers
18 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 ...
0
votes
1answer
54 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. ...
1
vote
0answers
22 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. ...
1
vote
2answers
65 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?
0
votes
1answer
30 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: ...
1
vote
1answer
34 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....
0
votes
3answers
70 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 ...
0
votes
2answers
67 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 ...
0
votes
0answers
13 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 ?
0
votes
1answer
28 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 ...
0
votes
2answers
40 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 (...
0
votes
1answer
30 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
2
votes
1answer
58 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 ...
2
votes
2answers
275 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 ...
1
vote
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 ...
0
votes
1answer
65 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 ...
0
votes
1answer
60 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 ...
0
votes
1answer
41 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? ...
0
votes
1answer
34 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 ?
0
votes
1answer
51 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 ...
0
votes
0answers
63 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 ...
3
votes
2answers
263 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-...
1
vote
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 ...
0
votes
1answer
48 views

Cisco SMB Switch Configuration for VOICE VLAN and DATA

I am hoping to get some assistance with a current issue I am facing at the moment... I have 3 Cisco SMB Switches, (2) SG300 Managed Switches and (1) Unmanaged Switch. SWSG1 | 172.16.1.100 | Port 24 ...
0
votes
0answers
49 views

Cisco 1841 stuck on boot?

I found an old Cisco 1841 router and decided to boot it up to play with it a little. Everything seemed to be going ok but I guess something interrupted the boot. Last line is %SYS-6-...