[afnog] Bridged Access Network

[Mark Tinka]

On Wednesday, October 09, 2013 04:11:10 PM Vincent Mwamba 
wrote:

> 1. How will the DHCP be relayed over a layer 3 network
> without MPLS or PPPoE?

With DHCP for subscriber management, there are two typical 
options:

	1. Run DHCP as a local service on the BRAS.

	2. Run DHCP Relay from the BRAS toward a DHCP server
	   located somewhere in your core network.

Unless you're providing walled-garden services (like VoIP, 
IPTv, VoD, e.t.c.), MPLS is not necessary for subscriber 
management.

> 2. when we migrate to Layer 3, do we have to have a
> gateway for each service we terminating at the high
> sites? the reason am asking is we have about 30 high
> sites in a city offering all our various services. How
> should we manage the IP addressing per high site or per
> service and where do the customers terminate as their
> gateway.

If by "per service" you mean per customer, then the quickest 
win will be to break each customer down to a VLAN, and offer 
IP services to them on individual VLAN's at the nearest IP 
router sitting on the back of the trunk to the site.

If you can afford 30x routers, one for each site, your life 
will be simple. If you can't, you can deploy a handful of 
routers as far as your budget permits, and aggregate the 
sites across those routers accordingly.

All that said, you'd still do well to look at features on 
the WiMAX network that can help control broadcasts and 
broadcast storms, as well as implementing storm control 
where possible.

Mark.
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