I was hoping to use BGP communities with a backup link, to try to get 
certain types of traffic which are prefering the backup, to go to my 

I had hoped to use BGP communities to do this, but I found that BGP 
communities do not support 4 byte ASN, and my backup path provider has a 
4 byte ASN.

Is there a mechanism around this in ROS? Another method? With IOS and 
JUNOS there are some extended community list types that allow this (but 
are apparently not universally supported).

I suspect that the answer is "no, you just can't use 4 bytes with 
communities", hopefully somebody can shine some light?

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