Alasdair McWilliam wrote:
Hello,
Apologies if this is a duplicate post, the original message went wrong and
unsure if the list actually forwarded it on or not!
This is a bit of an extension from the original post, but what would be
considered best practice for outbound routing, if you had one link to two
ISPs?
For example, if you were downloading a full BGP table from both ISPs and
assigned local preference to some routes, traffic from a customer could
arrive on ISP1 and return traffic be sent via ISP2. Is this generally
considered to be acceptable or is it preferential for return traffic to be
routed the same ISP from which it came into your network?
It is completely normal and common for traffic to take different paths
in and out especially when both endpoints have different paths
available. There is no reason to be concerned about this from a
technical perspective.
- Kevin
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