[c-nsp] interesting ASR 9k bgp multipath issue
Oliver Boehmer (oboehmer)
oboehmer at cisco.com
Mon Mar 31 14:26:20 EDT 2014
>so, I have some internally anycasted prefixes (DNS resolvers) as well as
>bgp maximum paths set to allow both ibgp and ebgp multipath. Oddly, as
>you can see below the multipath appears to think two paths are identical
>even when they have different IGP metrics (path #1 and path #2), any idea
>if this is a bug or how to fix it? Obviously if the IGP cost is the
>same it should load share, but if not it really should not be doing what
>is shown below since the paths are not equal.
John, what exactly did you configure in your BGP address-family? It looks
like you enabled "maximum-paths eibgp <n>", which also considers paths
with different metrics as multipath candidates.
oli
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