Re: BRAS Options

You have many options for BRAS, each with their pro's and con's.

Cheap option would be buy grey market ASR1K boxes, or scale 7301's
horizontally :D
Mid price option would be Nokia vSR running on x86
High price option would be physical "big box" router, e.g. Nokia 7750,
Juniper MX2/4/9xx

The Nokia vSR is a good option, supports hierarchical queues and has
extensive RADIUS VSA's that allow you to tune almost every aspect of
the subscriber connection.   The other benefit is that in-country
support from the vendor is excellent.

Regards,



Andrew


On Wed, Nov 8, 2017 at 1:05 PM, Sam Silvester <[email protected]> wrote:
> Concur, this works fine.
>
> If you redistribute connected and static on your BRAS, and then use
> aggregate-address statements for your dynamic pools, you'll end up with only
> leaking actual static users - this is done in more than a few networks with
> many tens of thousands of static subscribers. BGP loves it, trust me :)
>
> On Wed, Nov 8, 2017 at 10:30 AM, Peter Lambrechtsen <[email protected]> wrote:
>>
>> I wouldn't have thought Static vs Dynamic should be too much of a problem
>> scaling horizontally depending on how you run your core unless you are
>> intending to statically route from the BRAS to the internet. If you have a
>> core router that you run BGP over a MPLS network to your BRAS, then you can
>> just export each route as a /32 into your MPLS network and it won't matter
>> which BRAS the customer turns up on.
>>
>> Yes that would end up with a reasonably sized route table on your core to
>> the internet but you are still only talking sub 16k subs so that should be
>> doable even with x86 tin.
>>
>> On Wed, Nov 8, 2017 at 12:51 PM, Stan Rivett <[email protected]> wrote:
>>>
>>>
>>> The multiple 7301 track was were I had been heading with one in
>>> Christchurch and one in Auckland. The problem is that most of our clients
>>> are RBI and we have no control over which router they appear on from our
>>> connections to Vodafone. That would be OK if we used dynamic IPs but we
>>> don't and its way too late to go back from that.
>>>
>>> Stan Rivett
>>> ------------------
>>> Netspeed
>>> PO Box 5691
>>> Dunedin
>>> P: +64 3 481 7245
>>> C: +64 21 323 841
>>> ------------------
>>>
>>> On 8 November 2017 at 12:34, Sam Silvester <[email protected]>
>>> wrote:
>>>>
>>>> Hivemind :)
>>>>
>>>> On Wed, Nov 8, 2017 at 9:56 AM, Gavin Tweedie
>>>> <[email protected]> wrote:
>>>>>
>>>>> Can you tell Sam and I used to work at the same company? :)
>>>>>
>>>>> On Wed, Nov 8, 2017 at 8:24 AM, Sam Silvester <[email protected]>
>>>>> wrote:
>>>>>>
>>>>>> To a point, the number of subscribers doesn't matter as much as the
>>>>>> throughput. If you're looking at 16k+ subs on a single box, you probably
>>>>>> need to start being a little careful but otherwise just make sure you've got
>>>>>> a decent RP and you should be right.
>>>>>>
>>>>>> If you simply need to shift (say) 10Gbps of traffic with "more than a
>>>>>> few thousand" but say less than 16k, then anything in the ASR range with an
>>>>>> RP2 and ESP40 will almost certainly be ample.
>>>>>>
>>>>>> Another thought, considering you mention the 7301, is to scale out
>>>>>> horizontally - it's not clear if you're already doing this. The nice bit
>>>>>> about that also is you could have a few 7201s sharing the load 4 ways, which
>>>>>> means your IP pool overhead to cater for a box failure is also much less
>>>>>> than running only two boxes.
>>>>>>
>>>>>> On Wed, Nov 8, 2017 at 9:41 AM, Dave Mill <[email protected]> wrote:
>>>>>>>
>>>>>>> A Juniper MX40 or MX80 seems to meet your needs there - depending on
>>>>>>> exact subscriber figures. From memory if every customer is in QinQ you won't
>>>>>>> be able to have more than 8000 on a MX80 series chassis due to interface
>>>>>>> limits.
>>>>>>>
>>>>>>> Dave
>>>>>>>
>>>>>>> On Wed, Nov 8, 2017 at 12:07 PM, Stan Rivett <[email protected]>
>>>>>>> wrote:
>>>>>>>>
>>>>>>>> Crikey, thanks for all the replies
>>>>>>>>
>>>>>>>> Yes we need 10 Gbit, at least 3 ports and I'd rather not be too
>>>>>>>> specific about numbers but more than a few thousand.
>>>>>>>>
>>>>>>>> Apologies for being a bit of a cheap bugger but you know what its
>>>>>>>> like as an SME, it all comes out of my pocket ;-)
>>>>>>>>
>>>>>>>> Cheers
>>>>>>>>
>>>>>>>> Stan Rivett
>>>>>>>> ------------------
>>>>>>>> Netspeed
>>>>>>>> PO Box 5691
>>>>>>>> Dunedin
>>>>>>>> P: +64 3 481 7245
>>>>>>>> C: +64 21 323 841
>>>>>>>> ------------------
>>>>>>>>
>>>>>>>> On 8 November 2017 at 11:14, Tim Price <[email protected]> wrote:
>>>>>>>>>
>>>>>>>>> Juniper MX5 + licensing shouldn’t cost you more than $30k depending
>>>>>>>>> on your Juniper partner status and where you buy it from.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> From: <[email protected]> on behalf of Stan Rivett
>>>>>>>>> <[email protected]>
>>>>>>>>> Date: Wednesday, 8 November 2017 at 11:02 AM
>>>>>>>>> To: nznog <[email protected]>
>>>>>>>>> Subject: [nznog] BRAS Options
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hi all
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> The time has come to replace my poor old Cisco 7301 and the quote I
>>>>>>>>> got for an ASR1002-HX made my eyes water. Still waiting for a Juniper quote
>>>>>>>>> but the general discussion seemed like similar numbers.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Are there any other reliable options out there that don't cost more
>>>>>>>>> than my first house?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Cheers
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Stan Rivett
>>>>>>>>>
>>>>>>>>> ------------------
>>>>>>>>>
>>>>>>>>> Netspeed
>>>>>>>>>
>>>>>>>>> PO Box 5691
>>>>>>>>>
>>>>>>>>> Dunedin
>>>>>>>>>
>>>>>>>>> P: +64 3 481 7245
>>>>>>>>>
>>>>>>>>> C: +64 21 323 841
>>>>>>>>>
>>>>>>>>> ------------------
>>>>>>>>>
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>>>>>>>>
>>>>>>>>
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>>>>>
>>>>>
>>>>>
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>>>>
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