Emerging Member
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Registered: ‎11-22-2013
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DHCP and static IP addrs on WAN port.

ATT Gigapower actively markets their static ip blocks but sadly the ERL doesn't allow for DHCP and static ips on the same interface.   You still have to use DHCP to keep the connection alive so you can't just use the statics and ignore DHCP.

 

I've searched and see that people have asked about this over the past few years but as of 1.9.1.1 it is not allowed.

 

Is this on your radar?

SuperUser
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Re: DHCP and static IP addrs on WAN port.

Huh?

 

To keep a connection alive, why not a continuous

ping from somewhere?   Dav


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Emerging Member
Posts: 45
Registered: ‎11-22-2013
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Solutions: 2

Re: DHCP and static IP addrs on WAN port.

I'm not privy to their internal network configs so I can't be sure  but I think they use the dhcp requests and the periodic EAPOL 802.x exchange to keep your connection active.  if you don't renew then they block you.

 

perhaps what I could do is only configure the statics on the interface and then manually run dhclient on that same interface. 

 

Thanks!

Rob.

SuperUser
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Re: DHCP and static IP addrs on WAN port.


@freyder wrote:

ATT Gigapower actively markets their static ip blocks but sadly the ERL doesn't allow for DHCP and static ips on the same interface. 


Most devices don't Man Wink

 

Last I looked, AT&T still required you use their pace box as your modem (i.e. you couldn't just connect the ER directly to their ONT).  Sure, scrapping that brick would be better than "DMZ+", but oh well.

Veteran Member
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Re: DHCP and static IP addrs on WAN port.

If DHCP is up, do they already route packets for your subnet to you?

If so, then you can just use NAT rules , and don't have to bother about assigning addresses to WAN interface.

 

And when you need addresses locally on router itself (for instance VPN endpoint),  assign the address to loopback interface.