Appropriate router for managed office space

[coxhaus]

My thinking is if your are saying the modem is a layer 2 device then we are talking bridging not routing. Routing happens at layer 3. Bridging happens at layer 2.

 

[sfx2000]

My thinking is if your are saying the modem is a layer 2 device then we are talking bridging not routing. Routing happens at layer 3. Bridging happens at layer 2.

Yes, most CM's are bridges...

A combined CM/Router/AP is another story...

 

[coxhaus]

I just heard pfsense has support for the /31 bit mask. I may try it. I am switching out my layer 3 switch for another one. It would be a good time to try it.

 

[sfx2000]

I just heard pfsense has support for the /31 bit mask. I may try it. I am switching out my layer 3 switch for another one. It would be a good time to try it.

I dunno - give it a try, but the /31 is a corner case

 

[sfx2000]

Just wanted to close the loop on the Cox thingy with the broadcast and GW being outside of the /30, and also perhaps clarify things - and hope this helps OP with his issue...

Again - they assign /30's to residential customers - and they supernet for the GW and Broadcast

This should clear up the confusion - yes, there are 2 hosts available to use, and the network IP and broadcast IP bookend the range for the assigned IP/netmask

ipcalc 68.7.113.144/30 255.255.255.0
Address:   68.7.113.144         01000100.00000111.01110001.100100 00
Netmask:   255.255.255.252 = 30 11111111.11111111.11111111.111111 00
Wildcard:  0.0.0.3              00000000.00000000.00000000.000000 11
=>
Network:   68.7.113.144/30      01000100.00000111.01110001.100100 00
HostMin:   68.7.113.145         01000100.00000111.01110001.100100 01
HostMax:   68.7.113.146         01000100.00000111.01110001.100100 10
Broadcast: 68.7.113.147         01000100.00000111.01110001.100100 11
Hosts/Net: 2                     Class A

Supernet

Netmask:   255.255.255.0 = 24   11111111.11111111.11111111. 00000000
Wildcard:  0.0.0.255            00000000.00000000.00000000. 11111111

Network:   68.7.113.0/24        01000100.00000111.01110001. 00000000
HostMin:   68.7.113.1           01000100.00000111.01110001. 00000001
HostMax:   68.7.113.254         01000100.00000111.01110001. 11111110
Broadcast: 68.7.113.255         01000100.00000111.01110001. 11111111

Hosts/Net: 254                   Class A

ipcalc is in most repo's - very handy tool for network folks...

 

[coxhaus]

So I guess they are actually chewing up 4 IP addresses out of the superscope?

 

[XeoNoX]

So I guess they are actually chewing up 4 IP addresses out of the superscope?

i say we need to analyze the situation with microscope