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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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Cannot change channels on University's WiFi [on hold]

*I'm really sorry if this isn't the place to have a question like this. Since like a week, I've been experiencing extremely poor speed (cannot load even presentations). Speedtest shows 0.5mpbps/...
3
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1answer
28 views

Is there any problem with using wifi to continuously signal numerous sensors?

The company I work for is developing a sensor network that will require roughly 1 sensor per every 6 m2 or about 160 sensors for a 10,000 sq ft building. They need to synchronize them by sending a ...
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0answers
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403 Forbidden when trying to access Tp-link Archer C5 V4 admin interface via OpenVPN [on hold]

What i try to do is to access the administrator GUI when connected via OpenVPN. The other way is to enable remote management but that also meant to have it open over the internet. Right now i have ...
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0answers
24 views

Accessing OpenVPN server from client on a home network [on hold]

I'm trying to access the OpenVPN server at my job from home. If I connect my home laptop to the wifi hotspot on my Huawei P20 Pro, it works fine. However, when I try the same on my home wifi, the ...
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0answers
11 views

Telnet to GNS router from bash [closed]

I have GNS3 and am just starting out trying to learn a bit about networking. I did the tutorial here: https://docs.gns3.com/1d1huu6z9-wWGD_ipTSQZqy2mpaxiqzymu-YQo6at_Jg/index.html and have the ...
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0answers
34 views

Why do the tunnel protocol on these two router show different values

Two routers R1 and R2 have a tunnel built between them in the 103.103.103.0/24 network. The end point of the tunnel are 75.75.75.2(on R1) and 76.76.76.2(on R2). Can anyone explain why does the Tunnel ...
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0answers
18 views

Router recommendation [closed]

I'm trying to find a low-budget Cisco router that has WiFi, VPN, Gigabit WAN and Ethernet, and maybe 3G/4G connectivity. It will be used for a small home server and normal Home WiFi usage. Most of the ...
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2answers
52 views

In OSPF does a DR consume more resources than a BDR?

What is the best practice in conserving router resources? Should a single ABR router be the DR for all areas? Will that have a negative impact on the resources, or would it be better to let other ...
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0answers
25 views

Unable to SSH into switch: Key exchange or Algorithm Negotiation failed [closed]

I am having a D-link 1510-28 switch to which I am trying to SSH into. Upon trying the command: srajan@srajan-Virtual-Machine:~$ ssh admin@10.82.64.5 Unable to negotiate with 10.82.64.5 port 22: no ...
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0answers
14 views

Why might my router and AP (via cat-5) start behaving oddly after several years? [closed]

I am in a low wifi density area, only a few channels ever show activity. To get a good throughput to my garden office, about 120 feet and a few thick brick walls from my router, I have a cat-5 wire to ...
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1answer
23 views

Can a VPN tunnel between routers be built with different tunnel protocol on both ends?

I have two routers and the tunnel between them is up and working well. Router1 has GRE/IP as the protocol on its tunnel interface, and as for Router2 the tunnel interface is working with IPSEC/IP. Can ...
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0answers
30 views

How should I interpret the results of a WiFi site survey? [closed]

I originally posted this question on SuperUser to determine how I might improve the WiFi signal in my house. Since it's been put on hold for being too subjective, and I'd really appreciate an answer ...
2
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2answers
51 views

How does a router know the destination mac?

so if I send a packet from a host to another from the same network we know the mac address of both the source and destination. However if the receiver is in a remote network the destination mac ...
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0answers
43 views

Cisco ISR Zone Based Firewall dual stack not matching returning traffic for ipv6

I have a bit of a problem with my Cisco 1921 ISR config. I have ipv4 (obviously) and also native ipv6 connectivity in my home lab. I am trying to set up the zone based firewall. With ipv4 traffic, the ...
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1answer
34 views

Difference between PEM 'Not OK' and PEM 'Input Failure' in Juniper

I have one query with regard to PEM (Power Entity Modules) in Juniper routers. On MX series routers, 4 x PEM Modules are installed. However in case 1 x PEM is not receiving power (like Input Power ...
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2answers
49 views

Which parts cost most of CPU and Memory resources in Router or Switch

I'm a new guy of enterprise network traffic optimization. I'm very curious why the enterprise Router or Switch so expensive. As in my mind the Router just look up route table (I guess it should be a ...
2
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3answers
407 views

Does a router send frames or packets?

Perhaps it's a novice question, but does a router send/receive frames? When I read about this subject, it seems that routers decapsulate the frame on arrival, and encapsulate the packet in a frame in ...
2
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2answers
59 views

Why isn't web traffic blocked by router?

(A naive/stupid question which I couldn't find answer to on the web.) Why is the internet traffic reaching me even if I haven't set up port forwarding. (For example, I can view websites). What I ...
1
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1answer
35 views

One Fiber Optic Line 24 Cores for Multiple Services Transmission

Hello we have a construction project for building a compound of 50+ villas. The aim is build and connect the villas all together transmitting all services through the fiber optic. The services ...
1
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2answers
67 views

What's the role of Default Gateway?

It acts as the "gateway" to the Internet,but also from what i have read,it's the last thing a packet would be sent to while trying to route (when checking the senders' route table). Maybe it's the ...
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1answer
39 views

If a router doesn't know where to send data what 2 options does the router have?

Looking back at some notes i've been making while going along trying to learn for ICND1 (still very early days), I have this question which I found while trying to quiz myself "If a router doesn’t ...
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1answer
50 views

Can i capture 127.0.0.0 and 0.0.0.0 network using wireshark?

Yeah, I've done capturing 127.0.0.1 ( loopback address ) using GNS . But it is possible to capture 127.0.0.0/8 and 0.0.0.0 direclty from any adapter on our device? Here is a network route of my ...
2
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1answer
41 views

Security Advisory: Cisco RV320 or RV325 Routers are Hackable World Wide

If the connectivity and security of your organization rely on Cisco RV320 or RV325 Dual Gigabit WAN VPN routers, then you need to immediately install the latest firmware update released by the ...
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1answer
21 views

WAP power profile?

Context The company I work for provides for its workers an ethernet and, for temporary visitors, a limited bandwidth/time wifi. There is a new trend in France: Wifi and RF are the devil. Question ...
4
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1answer
42 views

How can I retrieve a configuration programmatically on a JunOS device?

this is a part of the configuration of Juniper Router, it stands the vlans: family inet { address 3.189.239.238/29; address 3.189.239.254/28; } ...
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1answer
39 views

Private IP vs MAC

What I know is that when we connect to another IP, our Public IP gets shared to the outside world, and when they address us they use our Public IP (gateway), and then the gateway directs the ...
3
votes
1answer
50 views

Cisco Router IOS update

I am facing problem in update the IOS of Cisco 7304 router. I am upgrading from 12.4(24)T2, to 15.2(4)S7 this. but I was boot from this version 15.2(4)S7 it booted proper from flash. But when I put ...
1
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1answer
35 views

How can I configure link aggregation/bonded LAN for my simple Ubuntu router build? [closed]

I'm spinning out on this one...! Someone please help! I followed this fab tutorial below to make my own Ubuntu based router: How to build a simple router Ubuntu Server 18.04 Which works great using ...
0
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0answers
35 views

Migrate from Zyxel Firewall to Next-Gen Firewall

we have a ZyWall 1100 in our office, managing all our Zyxel access points and functions as a router. We now decided to swap to a Sonicwall NSA 4650. To do so, we configured the SonicWall 1:1 like the ...
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0answers
24 views

Cisco IP SLA HTTP request with frontdoor VRF

I am trying to use a IP SLA for HTTP on my Cisco ISR 4321 router to check if a website is reachable. The challenge is that I need to do that in a frontdoor VRF. I have configured ip name-server vrf ...
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1answer
23 views

How to see full description, When issuing “display ip interface description” ?? on huawei router

I have a router with many interfaces when I issue the command display ip interface description I get something similar to this Eth-Trunk1.444 10.2.2.2/28 U U <= Gige E To ...
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1answer
39 views

How to understand the juniper's chassis concept?

I searched a chassis article which is introducing the Chassis. MX960 Chassis It's a physical concept there, but I think the chassis is far more than this. because if we in the commands: there shows ...
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1answer
48 views

missing Packet tracer physical Tab

hello I am using packet tracer for a while.I use in my college computer. but recently I installed in my pc. when ever I try to add extra ports in my rouer or switch the physical tab is missing
20
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6answers
5k views

What stops someone from configuring their network with IP addresses they do not own?

Here's the scenario. I was picturing a university that bought a range of IP addresses. I think they'd still be inside a ISP (right?), but they'd have freedom to configure stuff the way they wanted. ...
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1answer
50 views

will wireless devices' MAC address be saved on layer 2 switch?

So I know that basically switches work like this (assuming 2 PCs are connected via Ethernet port) - the switch will store the mapping of the 2 PCs' MAC address and the switch ports in which they ...
0
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1answer
38 views

Routing a packet for directly connected network

We have a 3rd party Router code for our networking product. I am a novice networking developer and do not have much idea on routing. However we are facing a scenario for which we seek solution. The ...
0
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1answer
27 views

Connectivity from DHCP-based machines to servers with static IP addresses on the same gateway

I have Comcast service with 5 static IP addresses, using a Cisco DPC3939B as the cable modem. In addition to the 5 machines with static IP addresses, there are additional devices that get their IP ...
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1answer
43 views

Finding the network address for given host IP?

Answer provides the procedure to find the network address when a packet with destination IP(198.51.100.223/21) is reached at a router. But a network packet has the destination IP 198.51.100.223 in ...
3
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2answers
341 views

can we use Cisco 4900M switch for converting single mode (1G) to multi mode (10G) interface

can we use Cisco 4900M switch for converting single mode (1G) to multi mode (10G) interface. Please let me know other possible solutions.
2
votes
1answer
49 views

Switch 2960, Router 2901, Layer 3 switch 3560 manual reboot query

I'm learning networking. I had however a doubt is there a way to manually reboot the above switches and routers besides the command line? By maybe unplugging and plugging the equipment quickly or a ...
4
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2answers
334 views

With respect to Juniper Networks , what is the difference between 'Fabric Plane and 'Switch Fabric'?

I am struggling with the concept of 'Fabric Plane' and 'Switch Fabric'? I haven't found any clear cut difference between them? Why fabric planes are different in MX960 compared with MX240 and MX480. ...
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1answer
51 views

hsrp on both side of router

i tried to create a simple network topology to test the Hot standby router protocol gateway for "server2" and "server3", and the architecture is shown in the figure below. i would like to clarify ...
5
votes
2answers
882 views

How does a router know the MTU of a network?

I've done several exercises where you're given the MTU of a net or subnet, but I wonder how routers know the MTU of the nets they're connected. I've learnt that in OSPF protocol this information is ...
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1answer
34 views

License question on router cisco

Could anyone help me on license question on router cisco. Is ADV IP SERVICES LIC the license on router Cisco that all I need if I want to run these features on my router Cisco : L3VPN, L2VPN, VPLS and ...
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2answers
469 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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1answer
30 views

How cable connects to server if routers and switches are virtualized

Looking here for an example, I see: Spine Device Interface Summary As previously stated, the validated design includes up to 4 spine devices and up to 96 leaf devices that are interconnected by ...
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1answer
31 views

If all corporate (large scale) networks require routers

Wondering if all large-scale networks require routers or if there are other devices or things that are used in practice in some corporations instead of routers that solve the same or similar problems ...
0
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1answer
42 views

If physical switches are necessary in a SDN

Exploring how to implement a Software Defined Network and here it explains that an SDN switch is only dealing with the data layer. But then: Do We Need Special SDN Switches for SDN Networking? ...
6
votes
1answer
61 views

Two boot system images in cisco router

on my router I have two boot lines: boot-start-marker boot system flash c1900-universalk9-mz.SPA.157-3.M3.bin boot system usbflash0:c1900-universalk9-mz.SPA.157-3.M3.bin boot-end-marker I have a ...
2
votes
1answer
28 views

Need help to replicate the results of a tutorial on Frame Relay Configuration on Router. What do I need to change/add?

I'm having trouble getting the output shown at 03:14 here: Frame Relay configuration by Kevin Wallace My Network is 3 routers, each connected to the frame relay switch via Serial2/0 interface, with ...