a VLAN maps several subnet?
i've read this post: Multiple Subnets in a VLAN
and am wondering about the possible conflicts when using several subnets in a VLAN.
the recommended design is of course put a IP subnet in a vlan.
if i configure several ip subnets in a vlan, e.g. some hosts in 10.1.1.0/24, some hosts in 10.2.2.0/24 and both under a vlan, will these two networks interrupt each other? if there's actually no impact then why is such design not prefered?
vlan subnet
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i've read this post: Multiple Subnets in a VLAN
and am wondering about the possible conflicts when using several subnets in a VLAN.
the recommended design is of course put a IP subnet in a vlan.
if i configure several ip subnets in a vlan, e.g. some hosts in 10.1.1.0/24, some hosts in 10.2.2.0/24 and both under a vlan, will these two networks interrupt each other? if there's actually no impact then why is such design not prefered?
vlan subnet
asked 2 hours ago
user53815
212
New contributor
user53815 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
i've read this post: Multiple Subnets in a VLAN
and am wondering about the possible conflicts when using several subnets in a VLAN.
the recommended design is of course put a IP subnet in a vlan.
if i configure several ip subnets in a vlan, e.g. some hosts in 10.1.1.0/24, some hosts in 10.2.2.0/24 and both under a vlan, will these two networks interrupt each other? if there's actually no impact then why is such design not prefered?
vlan subnet
asked 2 hours ago
user53815
212
New contributor
user53815 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
i've read this post: Multiple Subnets in a VLAN
and am wondering about the possible conflicts when using several subnets in a VLAN.
the recommended design is of course put a IP subnet in a vlan.
if i configure several ip subnets in a vlan, e.g. some hosts in 10.1.1.0/24, some hosts in 10.2.2.0/24 and both under a vlan, will these two networks interrupt each other? if there's actually no impact then why is such design not prefered?
vlan subnet
vlan subnet
asked 2 hours ago
user53815
212
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user53815 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 2 hours ago
user53815
212
New contributor
user53815 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
user53815
212
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user53815 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 2 hours ago
user53815
212
asked 2 hours ago
user53815
212
212
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user53815 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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1 Answer
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This is possible however:
- you still need a router to have the hosts from one subnet to communicate with the hosts in the other subnet
- in a modern switched environment there's no collision, so this is not a issue, but you still have broadcast. All hosts will see the broadcasts from both domains which take some part of the bandwidth.
- Access Control Lists are bounded to interfaces. So to use ACL to limit traffic between the subnets you are limited to a single interface to place ingress / outgress rules; this is stil doable but more limited
- any host can potentially hear some traffic pertaining to the other subnet. That's a security issue.
- when troubleshooting a network issue, you may have to sniff traffic (with utility like tcpdump or wireshark), having several IP networks mixed render this or other troubleshooting more difficult
- overall, this is more complex to maintain and less scalable than having one subnet per vlan.
Basically there's just no benefit in doing so.
answered 53 mins ago
JFL
10.5k11235
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1 Answer
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1 Answer
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This is possible however:
- you still need a router to have the hosts from one subnet to communicate with the hosts in the other subnet
- in a modern switched environment there's no collision, so this is not a issue, but you still have broadcast. All hosts will see the broadcasts from both domains which take some part of the bandwidth.
- Access Control Lists are bounded to interfaces. So to use ACL to limit traffic between the subnets you are limited to a single interface to place ingress / outgress rules; this is stil doable but more limited
- any host can potentially hear some traffic pertaining to the other subnet. That's a security issue.
- when troubleshooting a network issue, you may have to sniff traffic (with utility like tcpdump or wireshark), having several IP networks mixed render this or other troubleshooting more difficult
- overall, this is more complex to maintain and less scalable than having one subnet per vlan.
Basically there's just no benefit in doing so.
answered 53 mins ago
JFL
10.5k11235
add a comment |
This is possible however:
- you still need a router to have the hosts from one subnet to communicate with the hosts in the other subnet
- in a modern switched environment there's no collision, so this is not a issue, but you still have broadcast. All hosts will see the broadcasts from both domains which take some part of the bandwidth.
- Access Control Lists are bounded to interfaces. So to use ACL to limit traffic between the subnets you are limited to a single interface to place ingress / outgress rules; this is stil doable but more limited
- any host can potentially hear some traffic pertaining to the other subnet. That's a security issue.
- when troubleshooting a network issue, you may have to sniff traffic (with utility like tcpdump or wireshark), having several IP networks mixed render this or other troubleshooting more difficult
- overall, this is more complex to maintain and less scalable than having one subnet per vlan.
Basically there's just no benefit in doing so.
answered 53 mins ago
JFL
10.5k11235
add a comment |
This is possible however:
- you still need a router to have the hosts from one subnet to communicate with the hosts in the other subnet
- in a modern switched environment there's no collision, so this is not a issue, but you still have broadcast. All hosts will see the broadcasts from both domains which take some part of the bandwidth.
- Access Control Lists are bounded to interfaces. So to use ACL to limit traffic between the subnets you are limited to a single interface to place ingress / outgress rules; this is stil doable but more limited
- any host can potentially hear some traffic pertaining to the other subnet. That's a security issue.
- when troubleshooting a network issue, you may have to sniff traffic (with utility like tcpdump or wireshark), having several IP networks mixed render this or other troubleshooting more difficult
- overall, this is more complex to maintain and less scalable than having one subnet per vlan.
Basically there's just no benefit in doing so.
answered 53 mins ago
JFL
10.5k11235
This is possible however:
- you still need a router to have the hosts from one subnet to communicate with the hosts in the other subnet
- in a modern switched environment there's no collision, so this is not a issue, but you still have broadcast. All hosts will see the broadcasts from both domains which take some part of the bandwidth.
- Access Control Lists are bounded to interfaces. So to use ACL to limit traffic between the subnets you are limited to a single interface to place ingress / outgress rules; this is stil doable but more limited
- any host can potentially hear some traffic pertaining to the other subnet. That's a security issue.
- when troubleshooting a network issue, you may have to sniff traffic (with utility like tcpdump or wireshark), having several IP networks mixed render this or other troubleshooting more difficult
- overall, this is more complex to maintain and less scalable than having one subnet per vlan.
Basically there's just no benefit in doing so.
answered 53 mins ago
JFL
10.5k11235
edited 2 mins ago
answered 53 mins ago
JFL
10.5k11235
answered 53 mins ago
JFL
10.5k11235
answered 53 mins ago
JFL
10.5k11235
10.5k11235
add a comment |
add a comment |
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