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flexipsolutions
New Contributor
‎06-09-2014 12:45 PM

Passing IP Addresses in a /29

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Hello,

We are currently using the Total Access 908e 3rd Gen as a PRI hand off for our VOIP customers.

Is there a way to have the Adtran unit be "in front" of all the other equipment, using one of the IP addresses in the /29 statically assigned to the Adtran, while passing the remainder of the addresses in the same subnet to the devices sitting "behind" the Adtran?

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Anonymous
Not applicable
‎07-09-2014 05:09 PM

Re: Passing IP Addresses in a /29

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JayH is correct, bridging isn't supported feature in the IPBG's when voice is enabled ---- (Configurable yes, but not a tested/supported solution with the IPBG's).   That said, I'd recommend you assign an IP Address outside the /29 subnet to the WAN interface of the TA 900e, then configure your provider edge router to forward/route all traffic destined for the /29 subnet to the IP address assigned to the TA 900e WAN interface.  You'd then assign one of the 6 "usable" addresses within the /29 subnet to the LAN side interface of the TA 900e and the remaining addresses to devices/firewall behind the TA 900e..  The end result is that you're now routing the /29 subnet through the TA 900e without NATing or bridging the traffic...

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jayh
Honored Contributor
Honored Contributor
‎06-09-2014 01:19 PM

Re: Passing IP Addresses in a /29

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I just got the latest software for the 908e Gen.3 (waiting on route-map fix) so haven't had a chance to do lab tests on bridging, but bridging on these hasn't been all that well supported in previous generations.

I assume that you want this for QoS purposes.

Two options, one is to NAT the other addresses to the devices "behind" the 908e, the other is to front-end the 908e with a switch with a VLAN on the outside /29 network and configure that switch for QoS. 

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flexipsolutions
New Contributor
‎06-09-2014 01:23 PM

Re: Passing IP Addresses in a /29

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Thank you for the helpful response.

Is bridging available on the latest software version?

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jayh
Honored Contributor
Honored Contributor
‎06-10-2014 10:52 PM

Re: Passing IP Addresses in a /29

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I haven't tested it.  Create a bridge group and see if you can put two Ethernet interfaces in the same one.  No IPs on the Ethernet interfaces, you configure a BVI and do your IP configuration there.

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Anonymous
Not applicable
‎07-09-2014 05:09 PM

Re: Passing IP Addresses in a /29

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JayH is correct, bridging isn't supported feature in the IPBG's when voice is enabled ---- (Configurable yes, but not a tested/supported solution with the IPBG's).   That said, I'd recommend you assign an IP Address outside the /29 subnet to the WAN interface of the TA 900e, then configure your provider edge router to forward/route all traffic destined for the /29 subnet to the IP address assigned to the TA 900e WAN interface.  You'd then assign one of the 6 "usable" addresses within the /29 subnet to the LAN side interface of the TA 900e and the remaining addresses to devices/firewall behind the TA 900e..  The end result is that you're now routing the /29 subnet through the TA 900e without NATing or bridging the traffic...

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Anonymous
Not applicable
‎07-10-2014 12:12 PM

Re: Passing IP Addresses in a /29

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Hello,

I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily.  If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.

Regards,

Geoff

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