Re: [cobalt-users] [OT] Dual Homing... How?

[Allan Liska <priz@xxxxxxxx>]

Answers in-line


On Thu, 2 Nov 2000 rpaiz@xxxxxxxxxxxxxx wrote:

You didn't say way you were located, so I am assuming the US.

> 
> I *think* I need the following:
> 
> * Buy a router 
    Your provider may give you a router as part of the service.  Since you 
    are doing this for redundancy, I would buy two routers...otherwise you 
    have a single point of failure.

> * Contact ??? and get my own block of IP addresses
    ARIN (www.arin.net) -- you have no chance of getting your own block 
    from ARIN right now, because you can't justify it and they won't give 
    IP addresses to web hosts.  You ISPs should assign you IP blocks, use 
    those until you grow.

> * Contact ??? and register as an Autonomous System
    ARIN $500 a year, they will assign you an ASN number which you can use
    in conjunction with your ISPs to set up the proper routing.

> * Inform both ISP's of my addresses and set up routes
    Yup

> * Use BGP or ??? to route and load-balance
    You will probably use EBGP:
    http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/icsbgp4.htm
    But you may want to think about OSPF instead:
    http://www.ietf.org/html.charters/ospf-charter.html
    WARNING: Both BGP and OSPF require a lot of overhead, make sure the 
    router/routers you have can support the protocl and still have spare 
    cycles to route.


Hope this helps.

allan "Bottom posting sucks"
    
--
Allan Liska
allan@xxxxxxxx  
www.priz.net
703-443-6754