[afnog] Bridged Access Network

[Vincent Mwamba]

Hi Mark,

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

Thanks

./Vinny


On Wed, Oct 9, 2013 at 3:26 PM, Mark Tinka <mark.tinka at seacom.mu> wrote:

> On Wednesday, October 09, 2013 03:17:22 PM Chris Wilson
> wrote:
>
> > Beware PPPoE MTU issues. Maximum MTU for pppoe is 1492
> > bytes unless you can enable jumbo frames.
> >
> > If you deploy anything with MTU < 1500, you will have
> > weird issues outside your control (due to remote
> > firewalls blocking ICMP TTL-exceeded messages, which is
> > against the spec but they do it anyway) and that will
> > give you support headaches, and you can only deploy
> > additional hacks such as MSS clamping to work around
> > them, which will give you more headaches, and you end up
> > with one of these:
> > https://en.wikipedia.org/wiki/Operation_Cat_Drop
>
> Like I said, DHCP is just simpler :-). No need to play MTU
> games, e.t.c.
>
> Similarly, on the backhaul side, one can replace L2TP with
> MPLS (using VPLS or my new favorite, EoMPLS) when running
> centralized BRAS topologies. Obviously, all this is
> unnecessary if you have equally distributed BRAS topologies,
> whether for PPPoE or DHCP.
>
> Mark.
>



-- 
*$$= *Vincent Mwamba

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*Skype: *    davince24

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