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RV220W built-in DHCP server can't save class B IP address pool

szszsz500
Level 1
Level 1

I was trying to set a DHCP pool with 127.16.0.0/16 with RV220W, however, RV220W UI can't save it. It displays "IP Address Range -"

Firmware 1.0.3.5 (just downloaded from cisco)

Browser: IE 8 and Chrome

Step to reproduce: (it is 100% reproducible)

1. login into RV220W admin web

2. Create a VLAN, id 201

3. Go to "Multiple VLAN subnets", select the VLAN, click edit

4. Enter following info:

IP Address: 172.16.0.1

Subnet Mask: 255.255.0.0

DHCP Mode: DHCP Server

Domain Name: Cisco

Starting IP Address: 172.16.2.100

Ending IP Address: 172.16.10.254

Primary DNS Server: 172.16.0.1

Leave rest of settings with default value.

DNS proxy is enabled

5. Press Save button. The UI shows text "IP Address Range -".

Screenshot is attached (RV220W-DHCP-IP-POOL-ERROR.png)

Expected result: RV220W shall save the setting and make use of 172.16.0.0 subnet in IP pool.

By the way, the error message "IP Address Range -" seems incomplete

I tried same setting on netgear FVS318N (very similar settings to RV220W), it accepts 172.16.0.0/16 as DHCP IP pool and works.

RV220W has great feature set meets my needs. Its UI is slow and sometime dashboard freezes, which I can live with comparing to features. But DHCP server IP pool can't be class B is huge limitation to me. Any firmware could fix it?

1 Reply 1

weslsmit
Level 1
Level 1

Hello Mkkk,

What you are getting here (IP Address Range) is a message showing that your address pool is too large. No matter what class you are choosing to use the router will only allow a pool of approx 254 addresses per subnet. Your address pool range will have to end at 172.16.3.98 or there about.

Thank You,

Wesley S