bgpd: fix aggregate route best path select

In ebgp+ ibgp deployment aggregate summary-only route
selected path should always be locally originated
summary route.
When aggregate route summary-only config is removed
The selected path is iBGP peer as its lower cost
Upon reconfiguring aggregate route summary-only,
the locally originated is not selected due to
always choosing first path attribute and bailing
out as no change in route update.

Ticket:#3467890
Issue:3467890
Testing Done:

Config:
------
TORC11(config-router)#router bgp
TORC11(config-router)# address-family ipv4 unicast
TORC11(config-router-af)# aggregate-address 184.123.0.0/16
        summary-only
TORC11(config-router-af)# no aggregate-address 184.123.0.0/16
        summary-only
TORC11(config-router-af)# aggregate-address 184.123.0.0/16
        summary-only

Before fix:
-----------
*> 184.123.0.0/16   ::(TORC11)               0         32768 i
*                   uplink1                                0 4435 5546 i
*                   uplink2                                0 4435 5546 i
* i                 peerlink-3               0    100      0 i

After fix:
----------
*> 184.123.0.0/16   ::(TORC11)               0         32768 i
* i                 peerlink-3               0    100      0 i
*                   uplink2                                0 4435 5546 i
*                   uplink1                                0 4435 5546 i

Signed-off-by: Chirag Shah <chirag@nvidia.com>

0 files changed, 0 insertions, 0 deletions