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Solved
Internal IP maxed out
Posted on 2016-08-25
I have internal IP maxed out with lot of wireless devices
My network has
internal wired and wifi with 10.0.x.0 (vlan 100)
guest wifi with 192.168.x.x
phone VLAN with 10.0.x2.0
I would need to add more IP on internal VLAN. Would it be advisiable to create another vlan scope to allow same traffic as 100 and merge them on DHCP with superscope?
My network has
internal wired and wifi with 10.0.x.0 (vlan 100)
guest wifi with 192.168.x.x
phone VLAN with 10.0.x2.0
I would need to add more IP on internal VLAN. Would it be advisiable to create another vlan scope to allow same traffic as 100 and merge them on DHCP with superscope?
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8 Comments
Active 4 days ago
It may be easier to just expand the scope to /23 and modify your dhcp scope as well
10.0.x.0 255.255.254.0
If you have a lot of statically assigned IP (eg printers, this may be a little tedious
I personally use multiple vlans
eg
servers (no DHCP)
Printers (no DHCP)
Users (DCHP). I also split users into several vlans based on location.
Of course, your network has to be very big for that to be beneficial
Public Wifi (DHCP)
Vendors (DHCP)
My recommendation is to design the network on paper before you start to implement or make changes.
10.0.x.0 255.255.254.0
If you have a lot of statically assigned IP (eg printers, this may be a little tedious
I personally use multiple vlans
eg
servers (no DHCP)
Printers (no DHCP)
Users (DCHP). I also split users into several vlans based on location.
Of course, your network has to be very big for that to be beneficial
Public Wifi (DHCP)
Vendors (DHCP)
My recommendation is to design the network on paper before you start to implement or make changes.
Active today
Is there a step-wise migration step I could follow for /23 implementation ? Should I create vlan and Ve interface for that vlan and gradually tag each port that vlan while existing one is still working? Do I need to create scope on DHCP without using super-scope and let existing and new on run separately.
For me wired and wireless vlan has to be the same, as it allows airplay on apple devices, if it is on the same network.
For me wired and wireless vlan has to be the same, as it allows airplay on apple devices, if it is on the same network.
Active 4 days ago
Yeah, you could create a new vlan and migrate your network
On the router or switch that acts as the gateway
interface vlan 10
ip address 10.0.10.1 255.255.254.0
If access list exist, create a new one and apply as needed. Do the same for routes
On DHCP
Create a scope for vlan 10
Set exclusions, reservations, and options as desired
On the Access switches
Switch the interface to vlan 10 and toggle the ports
eg assuming ports 10 to 48 is what you intend to migrate
int range gi1/0/10 - 48
switchport access vlan 10
shut
no shut
For Wireless
You can either create a new SSID or modify the IP scheme for the existing one
Modify IP and subnet mask of statically assigned devices
If modifying existing vlan
modify the subnet mask of DHCP scope and extend the range
modify the subnet mask of the vlan interface on the distribution switch
modify access list and routes
Then modify the subnet mask of statically assigned IPs
On the router or switch that acts as the gateway
interface vlan 10
ip address 10.0.10.1 255.255.254.0
If access list exist, create a new one and apply as needed. Do the same for routes
On DHCP
Create a scope for vlan 10
Set exclusions, reservations, and options as desired
On the Access switches
Switch the interface to vlan 10 and toggle the ports
eg assuming ports 10 to 48 is what you intend to migrate
int range gi1/0/10 - 48
switchport access vlan 10
shut
no shut
For Wireless
You can either create a new SSID or modify the IP scheme for the existing one
Modify IP and subnet mask of statically assigned devices
If modifying existing vlan
modify the subnet mask of DHCP scope and extend the range
modify the subnet mask of the vlan interface on the distribution switch
modify access list and routes
Then modify the subnet mask of statically assigned IPs
Active 4 days ago
Yes, you could if you want to go that route
It's still a separate network, similar to creating a separate vlan. You may need to manually disable IPv6 on other wired devices if your desire is to limit IPv6 to WiFi only.
It's still a separate network, similar to creating a separate vlan. You may need to manually disable IPv6 on other wired devices if your desire is to limit IPv6 to WiFi only.
Active today
the only thing I am worried about /23 is subnet mask on servers with static IP addresses. Would still work along with old /24, so I do not have to change subnet mask on server immediately after creating new dhcp scope option for dynamic devices and old server would still work on same network address with different subnet
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