Help with ATT SB67030 Deskset/SB67010 PSTN Gateway

[Senbonzakura]

Alright, so the problem I'm having right now is the AT&T SB67030 Deskset/SB67010 PSTN Gateway is not getting an IP address assigned to it. When I plug into that port in which is going to the device I get an address assigned it it. It's going from a ASA 5516-X Series Firewall to a Catalyst 2960-X Series Switch in which I have VLANS configured. Anyone have any ideas why this is happening? If I take the ATT device and plug it into the modem it gets assigned no problem.

[Giuseppe Larosa]

Hello @Senbonzakura 

my understanding of your topology is the following:

Internet modem ----- ASA5516-X ----- C2960X-switch -----  SB67030 Deskset/SB67010 PSTN Gateway

You need to be aware that the Firewall ASA5516-X is likely configured as a L3 device with an outside and an inside interface with different IP subnets and with NAT enabled between them.

In order for the PSTN gateway to get an IP address when connected downstream the C2960X and downstream the firewall a DHCP server has to be available on the internal network.

So you can try to enable a DHCP server on the C2960X.

Only if the FW is used in transparent/bridged  mode you could expect the modem to be able to serve an IP address via DHCP downstream of the firewall.

Hope to help

Giuseppe

[Senbonzakura]

Right now the Firewall's outside has "ip address dhcp setroute" then I haved NAT/PAT configured so the addresses get translated. Now for each inside interface, has it's own DHCP pool that has addresses being handed out. The VOIP phones are getting an IP address assigned but no dial tone because the ATT device even though on DHCP won't get assigned an address. The port doesn't even light up and it's not shutdown at all.

So it goes from a 10.1.10.1 -> 10.0.0.1 - 10.0.0.254 /24 out of the port feeding the switch with the voice VLAN. The pool is working just fine that the FW has running but just for some reason the ATT wont get an address. Even when configured statically it won't work.

Is there a way, lets say G1/1 is the outside and G1/2 is the inside that's feeding the phones. The G1/1 has the IP ADDRESS DHCP SETROUTE, to allow port G1/1 to assign G1/2 an address from the modem but not all the rest so they can run their own pools? Also if so, what would be the commands?