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dhcp, multi inerface

This is in my Home and for home use...

My setup
UTM9 10.10.50.1
eth0 - Cisco 1140 Access point. 2 vlans. Home WiFi (vlan2 10.10.50.100), Guest WiFi (vlan3 10.10.20.1) (I cant get native vlan1 to work so I used 2 & 3)
eth1 - Cable modem
eth2 - DSL modem
eth3 - Internal LAN

What I am trying to do is to setup DHCP on eth3 as 10.10.50.151-200 and DHCP on eth0(vlan2) as 10.10.50.101-149

I connect to each interface and I do get an appropriate IP from each DHCP.
I get internet access on eth0(vlan3) and eth3

I do not get internet access on Home wifi eth0(vlan2)

I think it has something to do with the gateway address but I cant figure it out.

I tried 10.10.50.1 and 10.10.50.100 with no luck.
Any pointers?
Thanks.

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0 BarryG over 12 years ago

Hi,
Why are you using the same addressing (10.10.50.0/24 apparently) on both NICs?

Barry
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0 yabasoya over 12 years ago in reply to BarryG

Mainly because my family gets confused when I start using different subnets for things. "Why is my wireless xbox 10.10.10.111 when the other wired one is 10.10.50.112?" type of thing.

It's not really a necessity, it just keeps everything consistent.

Can you suggest a better way?
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0 BAlfson over 12 years ago

Hi, yabasoya, and welcome to the User BB!

The UTM can't route correctly if you have overlapping ranges on two interfaces. You could make them 10.10.50.0/25 and 10.10.50.128/25, for example.

Cheers - Bob
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0 yabasoya over 12 years ago

You're awesome. I never thought of doing it that way. It works perfectly!
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0 yabasoya over 12 years ago

To be honest, I never knew what /24 /25 meant until you pointed that out.
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0 BAlfson over 12 years ago

It's easy when you understand that, in IPv4, there are 32 address bits = four octets(bytes). The CIDR "/" notation is just the number of leading "1" bits in the netmask. 255.255.255.128 = 11111111 11111111 11111111 10000000 = /25

I usually check my work at Online IP CIDR / VLSM Supernet Calculator

Cheers - Bob
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