[afnog] Bridged Access Network
Mark Tinka
mark.tinka at seacom.mu
Wed Oct 9 22:51:45 UTC 2013
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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