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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Why do routing tables and arp tables both require a field of interface?
Routing tables are queried using destination IP of a packet to get the next hop IP and to get the interface to send the packet through.
But since the router will strip the ethernet header first and ...
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Router SNATs incoming connections [closed]
For some reason, my router changes the source IP of incoming connections.
I can't find which setting makes this happen or if this expected behavior.
For example, this connection was initiated by an ...
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Studying networking? [closed]
I have worked as UNIX systems administrator for a long time (30ish years), and I have often enough configured network devices, figured out simple routing tables and all the things you would come ...
user95865
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How did the packets travel from WLAN to Ethernet port on my wireless router? [closed]
Currently, I use an optical modem to perform the functions of a router(Strict meaning) and modem, and it also has a DHCP server.
For my own wireless router, I only connected its LAN port to the LAN ...
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Steps involved for packet transit from Router Ingress to Router Egress interface
I am looking to better understand, what happens within the router when an L3 packet arrives at a router interface and egresses via the exit interface.
For e.g consider the below,
assume Hundred Gig 3/...
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Is the routing table a control plane concept or a data plane concept?
I've always been told that the routing table is a control plane concept. You build this table, collect the routes, the way they were learned, their metrics, and so on.
You then use this information to ...
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Router cannot access LAN with public IP [duplicate]
I have the following setup:
ISP
|
|
external interface (public ip)
/
Router (running OPNsense)
\
internal interface 192.168.0.1
...
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Network scheme based on traceroute commands - is my thinking correct?
I want to create a hypothetical scheme of network containing the 3 routers (R1, R2 and R3) that were listed when running 2 separate traceroute commands.
traceroute 1:
1 ***
(...)
9 R1 (80.249....
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How does the final next-hop router forward a frame to the destination device if the public IP address is that of its router
We know that all device’s connected to the same local network will have the same public IP address as each other, which belongs to their local router.
So, since the IP packet’s destination address is ...
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Computers on different subnets can't talk to each other
I'm teaching an introductory computer engineering course in HS and had students in the lab network together the computers they built in the hardware unit - I appreciate the irony of somebody teaching, ...
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Why MLS2 Doesn't Get ICMP Packet To Where It Should?
This is a Packet Tracer lab from Kieth Barker's website with minor modifications. It is intended to exhibit how can we get to the network 10.10.0.0/24 access to the Web Server 23.1.2.2/24 Using NAT.
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Where is 1.1.1.1 really located? [duplicate]
I'm courious how this works:
When ping-ing 1.1.1.1 I get results of roundabout 15 ms, where 1.1.1.1 is located in California, according to iplocation.net.
When ping-ing a random ISP from California I ...
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VLSM Error on Cisco Distribution Switch [duplicate]
I have created 3 VLANS which should not overlap but somehow are giving me overlapping problems. Any reasons why? Is the switch buggy?
VLAN 10 10.1.1.0/28
255.255.255.240 Usable:10.1.1.0 to 10.1.1.15
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How can a router that can connect to both a TD-LTE network and a mobile phone network determine which type of equipment to connect to?
From what I understand so far, the equipment installed on the BTS that TD-LTE routers receive internet from is different from the equipment that mobile phones receive internet from. I want to know how ...
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Why is there overlap with two interfaces?
I am trying to configure router0, I assigned ip 192.168.26.1 to gigabitEthernet 0/0 and I tried to assign this ip: 192.168.26.33 to interface serial 0/0/0 but this error appears:
192.168.26.0 overlaps ...
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