Re: [ph-isp] Cisco load-balancing/failover

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Author: PH-ISP Mailing List
Date:  
To: PH-ISP Mailing List
Subject: Re: [ph-isp] Cisco load-balancing/failover
rpb@??? wrote:

> Hi,
>
> Joshua L. San Juan wrote:
>
>> Hi,
>>
>> I'm thinking of implementing load-balancing/fail-over on our Cisco
>> router. What I'm thinking of is to multi-home to two different ISPs:
>>
>>                            ISP A
>>              |
>>              |                |          -------------
>>           Router    -------------- ISP B
>>          -------------

>>
>> Questions:
>>
>> 1. From my research (I've never done this setup before), I would need
>> to get an AS and also run BGP on our router, correct?
>
>
> Yes, you do need your own AS.


I've tried a much less complicated approach....

Using 2 IPs provided by different ISPs, I OBSD CARP'd the internal
interfaces but not the external interfaces.


>
>> 2. I would be running BGP on our router - do we need a more powerful
>> router (currently using Cisco 1751 with 1 serial line), or just add
>> more memory?
>
>
> According to its specs, it supports BGP4, but I'm not sure if it can
> handle all the routes. Maybe a 3600 series router will do.
>
> If you have limited budget, you can try setting up OpenBGPD on a
> server and do multihop BGP. Haven't tried this yet though.
>
> ----- OpenBGPD server ----- Cisco 1751 se0 ----- ISP A
>                                        se1 ----- ISP B

>
>> 3. Should one of the serial links go down, how fast is the switchover
>> to the other link? We are doing video streaming - so switchover
>> should be as fast as possible.
>
>
> The failover is fast provided the down link is fully down (not
> intermittent). You can advertise half of your subnet on one link, and
> the other half to the other link, so as to have an ad hoc load balancing.
>
>> 4. Any tips / pitfalls to avoid / comments / suggestions on the
>> setup above?
>
>
> Paging Mr. Mar Loreto "Maloy" Apuhin. :D
>
>>
>> Thanks in advance.
>>
>>
>>
>> Regards,
>> Joshua L. San Juan
>
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