Firepower BGP Route Manipulation

[Solo356]

Hello Team,

How can we manipulate BGP attributes such as MED or AS-Path prepend for BGP routes received before sending them downstream?

Thank You.

[MHM Cisco World]

I will check example of using flexconfig for BGP MED and AS-Prepend. 
update you soon 
thanks 
MHM

[MHM Cisco World]

(Optional) Edit the Best Path Selection section:

1. Enter a value for Default Local Preference between 0 and 4294967295. The default value is 100. Higher values indicate higher preference. This preference is sent to all routers and access servers in the local autonomous system.

2. Check the Allow comparing MED from different neighbors check box to allow the comparison of Multi Exit Discriminator (MED) for paths from neighbors in different autonomous systems. This is disabled by default.

3. Check the Compare Router ID for identical EBGP paths check box to compare similar paths received from external BGP peers during the best path selection process and switch the best path to the route with the lowest router ID. This is disabled by default.

4. Check the Pick the best MED path among paths advertised from the neighboring AS check box to enable MED comparison among paths learned from confederation peers. The comparison between MEDs is made only if no external autonomous systems are there in the path. This is disabled by default.

5. Check the Treat missing MED as the least preferred one check box to consider the missing MED attribute as having a value of infinity, making the path the least desirable; therefore, a path with a missing MED is least preferred. This is disabled by default.

[bmurphree@myemma.com]

"router BGP ASN" is black-listed in FlexConfig, so you couldn't apply the neighbor x.x.x.x route-map name out command there. I have no clue why it's black-listed. Very frustrating.