All Questions
38
questions
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 ...
- 419
11
votes
2
answers
303
views
IPv6 Subnetting - Block RA on Switches?
I'm currently planning a v6 only small datacenter network.
Imagine for now one deployment consisting of 6 racks with 12 servers per rack.
Each server has 2 NICs for two physically separate networks (...
- 113
9
votes
3
answers
7k
views
Generate list of subnets on switch using SNMP?
Is anyone familiar with an approach to generate a list of subnets on a particular switch (let's pick a more popular one - Cisco) using SNMP? How about a list of VLANs? If so, can you point me to the ...
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?
- 430
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 ...
- 877
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 ...
5
votes
3
answers
3k
views
Is a router always necessary to link two subnets?
I am thinking especially of VLANs, which represent separate subnets that may need only one switch.
- 1,071
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 ...
- 53
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 ...
4
votes
2
answers
18k
views
VLANs and IP addressing
I have been tasked with setting up some VLANs on 10 HP 2520 switches. This is a departure from my normal IT support area so thought I'd seek out a little advice from more knowledgable people.
These ...
- 41
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 ...
- 158
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). ...
- 231
3
votes
2
answers
849
views
How to utilize multiple IP addresses from IP pool given by ISP
I'm still a student so please forgive me for my ignorance. I'm still learning. So I got a T1 line to practice and learn with and they gave me 5 IPs to play with. For example,8.8.8.0/29 8.8.8.[1-5]....
2
votes
3
answers
7k
views
Can 2 seperate lans share an unmanaged switch
Can i have two process networks using the same unmanaged switch?
- 293
2
votes
1
answer
2k
views
How does Watchguard's Secondary Network work?
am a bit confused on how this "Secondary network IP address on a different subnet" work.
http://www.watchguard.com/help/docs/wsm/xtm_11/en-US/index.html#cshid=en-US/networksetup/second_net_config_c....
- 121