Set bgp prepend dont work

i have MT 2.9.27 and a add this filter in

routing filter> add chain=level3-out prefix=89.36.xxx.0/22 prefix-length=22 invert-match=no action=accept set-bgp-prepend=5 comment=“” disabled=no

then i set this filter in out-filter to a peer

after that i do restart to that peer and…nothig happend

i was verify from lg.level3.net and nothings change.

where i do something whrong?

You need to install 2.9.37 version and ‘routing-test’ package, than it should work.