All Questions
38
questions
-1
votes
1
answer
27
views
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
...
0
votes
1
answer
144
views
Switch ping to router with trunk port
If I have a switch port trunk directly connect to a router with the follow scenario below:
-------- g1/0/1 (Trunk) g1/0/1 |------|
|switch| Native VLAN 1 SVI=...
0
votes
1
answer
713
views
Access multiple networks via one managed switch
We have a kind of granulated network structure. At the moment I have two network adapter connected to my system for two of the network areas. The Systems in network A and network B should not ...
0
votes
1
answer
245
views
Make printer in different subnet accessible to other subnet
i am creating a network and i want the printer which is in a different subnet to be accessible by all other subnets. The router network is 192.168.10.0/24 further subdivided into /28 subnets.
The ...
6
votes
5
answers
5k
views
Dividing a network into subnets using a router
I am learning about how L3 and IPv4 addressing works and I need some clarity on certain things.
I've encountered the following topology
So in this topology, the router stands in the center and ...
1
vote
2
answers
265
views
Can a host from different subnet bypass the network mask validation of destination host and communicate on layer 2?
I am aware that a host will always check the subnet of the destination node before the transmission in order known if it has to send it to the gatewey for different subnet.
However, would it be ...
6
votes
2
answers
3k
views
Can a single subnet work across several switches?
New to networking and studying hard but limited access to a kit to try things at the moment...
My question is - if I had, for example, two Layer-2 switches cable connected, could I have devices on ...
0
votes
3
answers
518
views
Bridges, hubs, switches and repeaters in subnetting
I'm learning to subnet and I'm constantly doing exercises on paper about this topic. I'm trying to breakdown a network into smaller subnets, given the number of hosts for each one. For now, I only ...
4
votes
1
answer
1k
views
Same Vlan Name / ID on different switches network subnet same or different?
I have several switches (some on same floor and another on other floors) all connected to core layer 3 switches through trunk links.
One of the vlan id / name is repeated along the switches. May I ...
27
votes
9
answers
31k
views
Why can't devices on different VLANs, but on the same subnet, communicate?
I have a question about switching. I have two devices connected to a switch with IP addresses 192.168.5.20 and 192.168.5.10. Both devices have the same prefix, /24. That means they are on the same ...
1
vote
3
answers
1k
views
how to do inter vlan for same subnet
I configure two same subnet network(ip:192.168.0.2 & ip:192.168.0.3) into VLAN...so they wont communicating with each other...but now i want them to communicate with each other...
For that i ...
1
vote
1
answer
3k
views
Can a VLAN have hosts with IP addresses outside it Subnet IP range scope?
I have 3 entities in my network.
A server,switch and an appliance which acts as a DHCP/PXE server.
When the server starts up, the DHCP server has to PXE boot the server. A seperate VLAN(1234) is ...
2
votes
1
answer
335
views
VLSM Determining Switch IP
i was given a network 130.4.0.0/16 that i needed to use vlsm on. which i did and got these vaules:
Address | Mask| Assignable Range | Broadcast
130.4.0.0 | /22 | 130.4.0.1 - 130.4.3.254 | ...
1
vote
2
answers
304
views
Overlapping IP addresses in CISCO 3650
I have overlapping also, but, my config is different.
Vlan 1 is 192.168.0.36/255.255.0.0 and Vlan 2 is 192.168.11.15/255.255.0.0.
Since the third octet is different, how is overlapping possible?
1
vote
3
answers
462
views
Vlan tips? New switches (hp 2920s), single subnet or multiple subnet per vlan?
we have a series of old switches that have been failing at the company for sonme time.. i've since purchased 6 hp2920's which are layer 3 (the old ones are layer 2).. we previously didnt use vlans... ...
5
votes
2
answers
15k
views
Routing Between 2 different vlans but same subnet
I have a basic doubt understanding vlan communication.
Scenario:
Let's say a single switch and has been configured with 2 vlans (vlan 100 and vlan 200). Vlan 100 connects to lets say 192.168.100.0 ...
1
vote
1
answer
348
views
Subnetting a network for VLANs
Real beginner here, struggling with my first real life network problem, existing kit, and almost no budget.
Two departments, which have to remain private from each other, are to be linked to main ...
8
votes
3
answers
56k
views
Why can't devices in different subnets talk with each other?
I know that the layer 2 doesn't understand IP, and the broadcast domain is same.
Why can't devices talk, how does it happen?
2
votes
1
answer
743
views
VLAN vs Subnet in switch
For VLAN communication we need a layer 3 device. For internetwork communication, we also need a layer 3 device. Then why did concept of VLAN emerge?
0
votes
2
answers
202
views
Separate Subnet for Each Vlan? [duplicate]
Thoughts and Query
I was tring to understand Inter-vlan routing and realised, that each exsisting vlan in the switch is configured with a different subnet.
Is this is a good practice or is there any ...
1
vote
2
answers
399
views
Packet transfer from one host to another
I was reading about how a packet is send from one host to another. I am confused about entries that will be made in layer-3 switch routing table. Does it contain the entries for layer two switches or ...
0
votes
2
answers
255
views
IP connectivity between hosts with differing subnet masks?
For instance, if switch A has hosts with mask /25 and switch B has hosts with /26. Will a ping from Host A to host B be successful?
How does the situation change if:
Both switches are connected to a ...
3
votes
1
answer
3k
views
What is the point of a subnet mask on a local network?
I have a question regarding subnet masks and my understanding (or misunderstanding of them).
So when a subnet mask is used, a bitwise AND is performed using the subnet mask and the IP address(es). ...
1
vote
4
answers
4k
views
Accessing devices on different subnets using a switch
I have two devices which come up with default IP addresses:
Device 1 - 192.168.168.168 mask 255.255.255.0
Device 2 - 192.168.1.254 mask 255.255.255.0
I can commonly deduce that both the devices ...
2
votes
2
answers
297
views
What are the differences between a private network and a subnetwork?
And what are the advantages of creating subnetworks if computers are assigned different IP addresses from the same range and can communicate with each other also with switches?
1
vote
1
answer
632
views
VLAN and Subnet relationship with 2 offices sharing a switch
I appreciate there is an answer here already. As well as reading this and seeing this video I am still slightly confused...
If a company has 2 offices (on the same floor in close proximity of each ...
3
votes
2
answers
3k
views
VLAN tagging, routing, and general pain
To everyone who takes the time to read below, thank you very much.
I want to start this off with the very general question and then give my exact situation. I really don't understand the terminology ...
1
vote
1
answer
6k
views
Creating an isolated subnet [closed]
First off; I'm not a networking expert so forgive me if anything I ask here is blindingly obvious, or I use the terminology incorrectly :)
My company has recently moved office to a new building where ...
1
vote
1
answer
95
views
Tradeoffs of an 'access network' with 30 bit subnet mask
I've got fiber lines coming into my office, with IP setup like so:
Access Network 123.123.123.20/30
Our Router: 123.123.123.21
ISP Router: 123.123.123.22
At the moment the router is taking the fiber ...
1
vote
2
answers
365
views
Multiple IP ranges at DC, how do I set this up?
I have been tasked with a DC installation of ten servers. I myself, am a software engineer and not a network engineer (welcome to enterprise!), so I am a bit puzzled over this. I have been assigned ...