10-03-2015 03:01 AM - edited 03-05-2019 02:26 AM
Does it make any difference in the application performance over the customer end , when the CE end router has got the mpls link with a static route pointing towards the PE end instead of bgp path ?
10-03-2015 05:09 AM
if they only have a single path out, it makes no difference if they have a single static default route vs a bgp learned default route. The bgp process in itself takes up memory to run on the router, so having just a static route advertised may be overkill to run bgp for. If they have multipaths out, it may make sense depending on what your customer is needing to do....
HTH,
John
10-03-2015 02:58 PM
The original poster has asked a pretty broad question about performance without supplying any specifics about the issue or the environment. But I absolutely do agree with John that when there is only a single path out then it makes no difference how that route was learned (static vs BGP makes no difference).
HTH
Rick
10-05-2015 05:25 AM
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One difference between having a static route vs. a dynamically learned route, the latter adds additional processing overhead. Normally this isn't much of an issue, but, for example, I have seen the BGP scanner process load up the CPU on smaller routers when dealing with full Internet route tables.
10-07-2015 10:55 AM
I interpreted the original question to be about the behavior in forwarding traffic and whether there is a difference between static routes and dynamically learned BGP routers. And in that context I continue to agree with John that there is no difference when there is a single path. But Joseph does make an interesting point that if you take a broader view and include the effort to learn and maintain the route then there is some performance cost in learning dynamic protocol routes as compared to static routes.
HTH
Rick
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