Keep in mind that Weight is Cisco proprietary. Most routers begin with local pref as
the first tie break.
*********** REPLY SEPARATOR ***********
On 11/27/2000 at 8:18 AM Frank Wells wrote:
>This is the BGP attribute decision process:
>
>1 BGP Path Selection starts; if the next hop is inaccessible, do not
>consider it.
>
>2 Consider larger BGP administrative weights first.
>
>3 If the routers have the same weight, consider the route with higher local
>preference.
>
>4 If the routes have the same local preference, prefer the route that the
>specified router originated.
>
>5 If no route was originated, prefer the shorter AS path.
>
>6 If the AS paths are of the same length, prefer external paths over
>internal paths.
>
>7 If all paths are external, prefer the lowest origin code (IGP [Interior
>Gateway Protocol] <EGP <INCOMPLETE).
>
>8 If origin codes are the same, prefer the path with the lowest
>MULTI_EXIT_DISC (MED). A missing metric is treated as zero.
>
>9 If IGP synchronization is disabled and only an internal path remains,
>prefer the path through the closest IGP neighbor.
>
>10 Prefer the route with the lowest IP address value for the BGP router ID.
>
>
>>From: "Yee, Jason" <[EMAIL PROTECTED]>
>>Reply-To: "Yee, Jason" <[EMAIL PROTECTED]>
>>To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]>
>>Subject: bgp path selection criteria
>>Date: Tue, 21 Nov 2000 03:38:56 -0500
>>
>>
>>
>>hi ,
>>
>>
>>Anyone here knows which BGP path criteria takes precedence ? AS_PATH or
>>local preference
>>
>>
>>From what I read it is local preference , but in actual fact it is not so ,
>>why I said this is because I have a customer who prepends their prefixes
>>many times then advertise them to us but on our side we set local
>>preference
>>to customers' routes to 90 which in fact will always come back to us if we
>>do this but this is not happening
>>
>>Instead the prefixes go to another providers' link because their AS-PATH is
>>shorter
>>
>>why is that so?
>>
>>
>>Jason
>>
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