We use on our live network static binding between IGP routes tag (static
routes) and BGP community using route-maps, and it works fine. I never heard
about an automatic mechanism that convert IGP route tag to BGP community ...


""bergenpeak""  a icrit dans le message de news:
[EMAIL PROTECTED]
> Is it possible to take tag values carried in OSPF external route
> advertisements and automatically map them into the community
> attribute of the respective BGP advertisement?
>
> Consider a router running both OSPF and BGP.  In the BGP config,
> there's a redistribute from OSPF into BGP.  Assume that only
> OSPF external routes, and hence those with tag values, are being
> redistributed into BGP.
>
> Assume that these external routes have different tag values.
>
> Is there a way to automatically get each respective OSPF tag value
> into the community value of the respective BGP route advertisement?
>
> So, if an OSPF external route advertisment has a tag value of 42,
> when the route is redistributed into BGP, the respective BGP community
> value would be 0:42.  If the OSPF tag value was 81, the BGP community
> value would be 0:81.
>
> It looks like it might be IOS possible to statically encode all the
> possible
> OSPF tag values, via a route-map, and then set the BGP community value.
> I've not actually done this yet, so not sure if its possible.  However,
> I'd rather use an automated mechanism for this.  That way, as new OSPF
> external tag types are used in the network, I don't need to update
> route-maps.
>
> Thanks




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