Thanks for the feedback! I'm not familiar with RSPL (obviously); I'll read
up on it.
As far as the soft reconfiguration goes, I assume I'll need to add the line
'neighbor <neighbor ip> soft-reconfiguration inbound' command to enable soft
reconfiguration.
To load balance outbound, I assume I'll need to do the following:
! 6509A - connected to genuity
route-map genuity-preference permit 10
match as-path 20
set local preference 10
ip as-path access-list 20 ^1$
neighbor <Genuity IP address> route-map genuity-preference out
route-map sprint-preference permit 10
match as-path 30
set local preference 100
ip as-path access-list 30 ^<sprint AS>$
neighbor <6509B ip address> route-map sprint-preference out
(And add the similiar statements to the 6509B)
----- Original Message -----
From: "Howard C. Berkowitz" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, October 29, 2000 4:35 PM
Subject: Re: BGP Challenge
> At 3:35 PM -0800 10/29/2000, whitaker wrote:
> >ok, so I'm trying to implement some BGP routing for the first time.
> >I've read through the advanced IP network design, Internet Routing
> >Architectures, the RFCs, and a couple other books on BGP. But as we
> >all know, none of this compares to good experience. So, before I
> >attempt to implement BGP in mission critical datacenter, I thought
> >I'd run it by the experts (that's you!) to make sure I'm
> >understanding this right.
>
> While your comments are informative, I strongly suggest you write out
> your routing policy in RPSL. It's good practice, in any case, to
> write the policy and register it with an appropriate routing
> registry. see http://www.radb.net. There are some tutorials at this
> site, there's the RPSL and the "Using RPSL in Practice" RFCs, my BGP
> series at CertificationZone, etc. Lots of material at
> http://www.nanog.org -- in particular, look for Avi Friedman's BGP
> 102 tutorial for more about filters.
>
> AS path prepend, as you point out, will influence traffic coming
> towards you. Do you want to try for some load balancing in your
> outgoing direction? One reasonable way to do that is to assign a
> higher (i.e., more preferred) local preference to customer/direct
> connected routes from each ISP (i.e., ASprovider +).
>
> >[snip]
>
>
>
> >
> >Here's my questions:
> >* Networks are going to be added once a week, not all at once. To
> >add a network, it is my understanding that I type 'clear
> >ip bgp * soft-reconfiguration outbound' to reset the bgp connection.
> >Is this correct?
>
> You need to predefine soft reconfiguration.
>
> As far as adding networks, I really would want to know more about
> your addressing.
>
> >
> >* Does this configuration effectively make my network non-transitive?
> >
> >* I've read about peer groups - would this be an effective way of
> >maintaining the configuration between the two 6509s? Or
> >would it just be adding an additional level of complexity?
>
> Peer groups are helpful for multiple interfaces on the same router.
>
> >
> >* Will this configuration help to balance out the traffic some
> >across the two 6509s?
> >
> >
> >
> >
>
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