I only prepended it once....here is a look at what Im doing without posting too much info.
Router 1 (HSRP Primary)
router bgp 1234
no synchronization
bgp log-neighbor-changes
network z.z.z.z mask 255.255.255.0
network v.v.v.v mask 255.255.255.0
network n.n.n.n mask 255.255.255.0
neighbor x.x.x.x remote-as 1234 <---Secondary Router
neighbor 1.1.1.1 remote-as 1111
neighbor 1.1.1.1 soft-reconfiguration inbound
neighbor 1.1.1.1 filter-list 1 out
neighbor 2.2.2.2 remote-as 2222
neighbor 2.2.2.2 soft-reconfiguration inbound
neighbor 2.2.2.2 route-map SETASPATH out
neighbor 2.2.2.2 filter-list 1 out
no auto-summary
route-map SETASPATH permit 10
set as-path prepend 1234
ip as-path access-list 1 permit ^$
Router 2 (HSRP Secondary)
router bgp 1234
no synchronization
bgp log-neighbor-changes
network z.z.z.z mask 255.255.255.0
network v.v.v.v mask 255.255.255.0
network n.n.n.n mask 255.255.255.0
neighbor x.x.x.x remote-as 1234 <---Primary Router
neighbor 3.3.3.3 remote-as 3333
neighbor 3.3.3.3 soft-reconfiguration inbound
neighbor 3.3.3.3 route-map SETASPATH out
neighbor 3.3.3.3 filter-list 1 out
no auto-summary
route-map SETASPATH permit 10
set as-path prepend 1234
ip as-path access-list 1 permit ^$
The secondary router prepended and populated the routes correctly to the internet but the primary router did not advertise the prepended route to the internet after I implemented this. ***UPDATED*** To be more clear it only advertised the route the was not prepended and the other route was removed from other bgp internet routing tables.
