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.
1,566
questions
0
votes
0
answers
9
views
Voip not working in bridge mode [closed]
First device - Pure ont with voice support and no QoS features.
Second device - Wireless Router with no voice support, but QoS features.
First scenario I can configure Voip in android: If i use ont as ...
1
vote
2
answers
45
views
In router's config, why do I need to advertise the directly connected network?
I have learned that, in routing config, a router must advertise all of its networks.
For example, in this topo:
Router A need to network 192.168.1.1 0.0.0.255 and network 100.1.1.2 0.0.0.255
But why ...
- 111
0
votes
0
answers
18
views
1Gig internet but can’t even watch Youtube [closed]
I have 1Gig internet speed but it usually drops to 1Mbps or lower if I don’t restart the devices at least twice every day. I can’t even stream Youtube properly on my TV. I have tried every combination ...
- 1
0
votes
0
answers
13
views
Does anyone know how to create two vlan on a Askey RTF8115VW router? [closed]
Does anyone know how to create 2 different vlan on a Askey RTF8115VW router?
I would like to be able to create two different vlan, one for the first port and another one for the second one. I would ...
- 101
0
votes
1
answer
40
views
CISCO cellular Router cannot reach network via my PC
I configured the cellular and my router is connected to the internet ping (5/5) Success
but I still cannot access the internet via PC
Here is my running-conf
Current configuration : 2271 bytes
!
! ...
- 1
0
votes
0
answers
6
views
Trace Route RTO in two or more hop but next hop works [duplicate]
Today when I was doing tracert,
in the 2nd & 3rd and also 4th Hop I get RTO but my next hop seems to be reachable. How come it works?
Please answer asap.
- 1
0
votes
0
answers
22
views
How can l block VPN connection on Network [closed]
My router is ZTE h188a I try to block VPN connection on my network
My router has in his settings
IP Filter - IPv4
I tried it but so difficult l should block all IP address to VPN which every one has ...
user88937
0
votes
1
answer
46
views
What is PPP and why does it not have a MAC address?
I just wanted clarification on what exactly PPP is and why it does not have a MAC address due to having seen that under a response to a question of how routers transverse packets to their destinations....
- 3
0
votes
2
answers
34
views
What ways are there to make sure router multicast tables are up to date?
I've been reading on IGMP v3 and think I understand the basics of how to join a multicast group - sending a Membership Report Message.
But I'm not sure what the "best" or even conventional (...
- 115
0
votes
0
answers
18
views
Wireshark filtering, wpa2 handshake type value and other types
I am capturing a wpa2 handshake with wireshark, and there is the type value of 03 which is a key I wonder if this type is constant for wpa2 handshakes, also the value of other types, if there were to ...
- 1
1
vote
5
answers
83
views
Are there any methods of differentiate between a single computer and a NAT router?
As far as I know, a traffic from a NAT router should appear similar to traffic from one computer with a single IP address. If you do not have any access to a network (let's say you are an ISP), can ...
- 113
1
vote
2
answers
76
views
If there's a NAT-capable gateway between WAN and a switch, why is a switch helpful?
To preface this question, my question is somewhat related to what I'm trying to understand as the difference between layer 3 switches and routers. The main difference between the two is that layer 3 ...
- 121
1
vote
1
answer
49
views
If your ISP already has a gateway, why do you need another gateway with NAT to come before a layer 3 switch?
Please bear in mind that I am learning and have never set up a network with routers and switches myself. Also please bear this is sort of going to be loaded question because there are multiple layers ...
- 121
0
votes
1
answer
43
views
Can you have multiple paths in BGP through different ASes?
In a course about networks in my university, we learnt about how in BGP routes, each AS chooses a single route to each IP prefix (though you may have multiple iBGP routes).
Meaning that in the ...
- 101
1
vote
1
answer
90
views
For IPv6, How much processing delay difference between using /64 and /127 for Core network interconnection?
I've question about IPv6 routing processing delay.
Lets assume we've got big Core network with huge traffic and many hops.
All router's p2p interconnection addresses are used /127 network.
In my ...
- 11
0
votes
1
answer
45
views
Sharing same IP address inside LAN? [duplicate]
Q: if 2 devices A and B share same ip address in LAN, can device A retrive all messages whose destination is device B?
I think this depends on how the LAN is configured.
If it's wireless then device A ...
- 1
0
votes
3
answers
76
views
One layer 2 switch in the middle of router network
In general,
The connection should be like
PC---SW---ROUTER---Many ISP router---Router---SW---PC
so the packet will be from
layer 2 ---layer 3---layer 2
What if I put one layer 2 switch in the network
...
- 15
0
votes
2
answers
39
views
Can 2 modems connected to the same router interfere with each other if their web access interface are the same IP address?
Here is information about the network:
I have 2 WAN connections to the same ISP which they provided 2 modems
for and configured them to be in bridge mode.
My MDF router (pfSense) connects both of ...
- 105
0
votes
2
answers
68
views
Customized IPv6 packet with multiple inner data fragments for multiple destinations
I am studying the possibilities of using IPv6 potentialities to design a customized IPv6 data packet that has the following features:
1. Combines many fragments of different data in one packet.
For ...
- 63
0
votes
1
answer
79
views
Cisco IR829GW - Stuck booting into Rommon Mode 2
No confreg commands are recognized. No set variable commands are recognized.
At first I was able to factory reset the router and go into the initial configure boot menu options, then from there I ...
- 1
0
votes
2
answers
72
views
My PCs aren't able to ping each other successfully. Why? I think my Ip route is the problem? I am not sure
I have a topology of PCs A, B, D, and E, 2 routers R1 and R2, and 4 switches A, B, D, and E for each of my PCs respectively.
PC A IP is 201.4.100.1/28 with a default gateway of 201.4.100.2,
PC-B IP ...
0
votes
0
answers
24
views
Is it possible to set maximum 32 PAT translations per global ip address?
So basically I'm trying to configure a cisco router (c7200) to use PAT with a pool of global addresses, and each global address should only support a maximum of 32 private addresses.
I've been ...
0
votes
1
answer
71
views
How to properly configure OSPF protocol?
I have this simple 3 router network that I need to configure the OSPF for, when using two routers every thing works fine and i can ping but when I add the third router nothing works
left router
...
0
votes
1
answer
31
views
GNS3 Router Telnet Configuration
I configured the IP address and telnet for my Cisco router but on GNS3 it shows a different IP address. When I ping the router from my Ubuntu virtual machine using the IP address I configured the ping ...
- 1
2
votes
2
answers
98
views
Is BGP always required when you have multiple ISPs?
I am trying to understand when is Border Gateway Protocol needed and I stumbled upon this question:
When is BGP needed?
The chosen best answer says:
You could peer with your service provider and ...
- 451
0
votes
2
answers
90
views
Public IP Configuration which has a private gateway
I bought a public IP from my ISP and they provided me with the following details.
WAN IP :10.129.69.157
LAN IP : 196.188.173.32/30
How do I configure this on my side ?
The told me to do configure as ...
- 103
1
vote
0
answers
15
views
Does a router need ARP to send data to router in anther netwrk, it already has the IP address of the interface right?why does it need the MAC address? [duplicate]
i am studying off this
https://www.practicalnetworking.net/series/packet-traveling/key-players/#arp
but my question is if ip address is for end to end communication , how is the end to end happening ...
- 11
1
vote
2
answers
53
views
WiFi password: What is the exposure? Is it only local or can WiFi password be used remotely somehow?
(As everyone does) I have a local WiFi password that is used for signing in and using the WiFi for local users.
I have a separate & far stronger (64 char) admin password to gain access to my WiFi ...
- 111
0
votes
1
answer
58
views
How to correctly setup a DHCP server in the following network?
So, I've got the following Network Configuration:
Assume that, on the graph, "PCs" can be any device that needs an IP(apart from a router).
Now, as explained on my title, I want to run a ...
- 1
1
vote
2
answers
69
views
How ARP works [Specific Case]?
After reading about ARP and NAT I'm really confused about putting them to work together.
Let's suppose we have a router A with a public IP of IP(A). Plus, 2 devices behind that router B and C, each ...
- 13
1
vote
1
answer
76
views
What happens if the layer 2 destination MAC address mismatches?
I was wondering, what happens if I send a packet with layer 2 destination (say 1ebf) different that what will receive it, lets say a router (mac 22ff) recieves it. Will it drop the packet? Or ...
- 13
1
vote
2
answers
146
views
Is it okay to not assign an IP address to the physical interface of router when used for "Router on a Stick"?
When setting up "Router on a Stick" interVLAN routing, the steps I have seen only covered creating sub-interfaces for each VLAN and assigning an IP address to each of these sub-interfaces. ...
- 13
1
vote
1
answer
93
views
Does each computer/smart phone use electromagnetic wave with different frequency to communicate when they're connected to a WLAN?
I read some papers about WLAN and Wi-Fi. They say that modern WLAN/Wi-Fi uses a kind of technology called "OFDM(Orthogonal Frequency Division Multiplexing)".
My understanding is: ODFM means ...
1
vote
1
answer
70
views
Is the header of any other layer (other than the Data Link layer) is also removed and re-added when reaching a router?
Based on my understanding, when a packet reaches a router, the Data Link layer header (and trailer if there is a trailer) will be removed from the packet and a new header (and a new trailer if there ...
- 13
1
vote
2
answers
121
views
Does a router need to have an IP address?
Does a router need to have an IP address? if the answer is yes, then what is the router IP address used for (one reason I can think of is NAT, but not all routers are used for NAT)?
- 11
0
votes
3
answers
149
views
Do all routers have two IP addresses?
I know that a home router have a private IP address and a public IP address, but what about the routers that an ISP uses, do these routers also have two IP addresses?
- 229
0
votes
1
answer
68
views
In what situation would normal choke packet be preferred over hop-by-hop choke packets?
When the host is far away, it makes sense to use hop-by-hop choke packets to resolve congestion.
But is there situations where normal choke packet is more appropriate?
And by the 'source' we mean a ...
- 1
0
votes
1
answer
46
views
Why I’m getting overlaps with fast Ethernet 0/1 when assigning an ip
But I have been receiving error code when I want to assist an ip to s1/0
3
votes
3
answers
290
views
Can you send data in LAN without an IP?
From What I know, IPs are used to communicate b/w two different networks say LAN1 and LAN2... and MACs are used to communicate within a LAN.. I think this because my instructor says that Hubs and ...
- 51
2
votes
1
answer
79
views
Do NAT Gateways Need to be the First Address of the Network?
NAT gateways are often given the first usable address in an address space.
Do any protocol specs require this? Or is this just a convention?
I skimmed RFC 1918 and RFC 2663 but didn't see anything ...
- 125
0
votes
1
answer
96
views
Slow internet throughput if servers are connected on 10G. But good when on 1G?
In our datacenter I'm having throughput issues if a server is connected on a 10G port on the switch. For debugging I already removed our router and asked our ISP for a small IP range that I can use ...
0
votes
1
answer
71
views
OSPF area or ABR impact on CPU and RAM consumption
I have two statments on OSPF, are they correct?
1- If I split a single area OSPF to an OSPF domain with area 0 and area 1, and there is just one ABR between area 0 and area 1, The load on CPU will ...
- 551
1
vote
1
answer
58
views
ISR 4331 vs ISR 4331/K9?
We have cisco router. On its box/package ISR 4331/K9 is written. I am watching a youtube video at below link, its title has word ISR 4331
https://www.youtube.com/watch?v=bk-4jkb6Cwo&list=...
- 111
0
votes
1
answer
106
views
Noob: i design a network for 156 computers/4 printers, need help in few things
Sorry if this stupid questions: I just learn networking like a week.
Lets say company xyz have 39 computers and 1 printer in each floor, there are 4 floors, total amount of computers is 156computers ...
1
vote
1
answer
66
views
Why does congestion happen
Imagine a network full of routers . The job of a router is to be able to receive multiple packets from multiple sources then send the packets 1 at a time in each of its outputs.If the routers are able ...
- 113
2
votes
1
answer
157
views
OSPF routes are not advertised
routers with ASBR2 connecting to AREA 0 and 10 and ASBR1 connecting to area 0 and 20, there's no entry of routes in R1's routing table, help me out
R1#sh run
Building configuration...
Current ...
- 61
2
votes
1
answer
179
views
RIP routes are not being advertised
I have 2 routers(R3 and R4 connected with serial links). I have advertised my loopbacks with RIP ver 2. with 192.168.1.1/32 and 192.168.2.1/32 on R3 and 192.168.3.1/32 and 192.168.4.1/32 on R4.
My ...
- 61
0
votes
1
answer
90
views
How router will send ARP resolve packet when it receive ARP request?
How router will send ARP resolve packet when it receive ARP request ??
Router by default enabled with proxy arp configuration?? If then proxy arp is not configured then what will happen if it receives ...
- 127
3
votes
1
answer
72
views
Setting an OSPF router in one area that doesn't see other areas
Could an OSPF router be configured so that it can only see its own area LSAs and does not accept LSAs from other areas? (For example, if it is in area 2, its routing table just shows routes in area 2, ...
- 551
1
vote
0
answers
13
views
Routing correctly mesh + gatewaty [closed]
I have a router modem DSL
I have 2 Aimesh Asus AX XT8
For a reason the node can not talk with the router base over WIFI (long range).
I than connected the lan on the modem(DSL ROUTER) to the NODE - ...
- 11