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.
1,604
questions
3
votes
2
answers
380
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 ...
- 131
1
vote
1
answer
79
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
!
! ...
- 11
1
vote
1
answer
391
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....
- 13
0
votes
2
answers
62
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 (...
- 125
1
vote
5
answers
103
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
438
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
564
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
180
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
117
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 ...
- 15
0
votes
1
answer
1k
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
176
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
...
- 45
1
vote
2
answers
117
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 ...
- 115
0
votes
2
answers
128
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
423
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
316
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 ...
