> From: "Mark E. Mallett" <mem@mv.mv.com>
> Subject: Re: [nsp] Bridging DSL to 7206
> To: svalliap@cisco.com (Siva Valliappan)
> Date: Fri, 8 Sep 2000 17:34:07 -0400 (EDT)
> Cc: mem@mv.mv.com, cisco-nsp@puck.nether.net
>
> > is your DSL provider BA?
> nope
>
>
> > BA uses mac filters and blocks mac addresses.
> > you will need to contact the relevant DSL circuit providers to open up the
> > appropriate MAC filters. then hard code the mac address on your BVI
> > interface. otherwise everytime the router reboots, it will calculate a
> > new MAC address for the BVI interface. it is possible other DSL
> > service providers are using similar MAC filters as well.
>
> Yeah, my thinking was that they were blocking the broadcast address
> at least- but they swear that they have no layer 2 filters at all.
If they're using something like a Redback, there's a provision for setting
up sticky MAC addresses as a security thing, which also fits the scenario.
You should have the provider see if they're seeing a MAC address for you
on the bridge and whether that corresponds to what's currently on your BVI.
Anyway glad for the reminder, BA had asked us about our MAC address when
they finally got our residential DSL up (about a year after we'd gotten
in the backhaul) and I hadn't gotten around to hard-coding it in.
About the only good thing about BA's residential DSL is that you can
usually set up peering with other local ISP's over the excess capacity
on your back-hauls and and do frame->ATM aggravation. 8-)
George
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