s6720EI BGP ipv4 peer advertise-ext-community

Hi guys. 

I'm traying to advertise extended communities to an eBGP peer on a s6720EI (V200R010C00SPC600) with no luck.

The command "peer x.x.x.x  advertise-ext-community" is not available at bgp ipv4-family unicast level nor at bgp configuration level also.

Is this feature available on this device?

thanks in advance.

[testswt-bgp-af-ipv4]peer 9.9.9.9 ?

  advertise-community      Send community attribute to this peer

  allow-as-loop            Configure permit of as-path loop

  as-path-filter           Routes matching certain AS path filter

  default-route-advertise  Advertise default route to this peer

  enable                   Enable peer

  filter-policy            BGP filter list

  group                    Specify a peer-group

  ip-prefix                IP prefix filter

  keep-all-routes          Keep all original route's information from the peer

  next-hop-invariable      Send original next hop for routes advertised to the

                           peer

  next-hop-local           Specify local address as the next hop of routes

                           advertised to the peer

  out-delay                Set the max initial delay for sending update

  preferred-value          Set route PrefVal to this peer

  public-as-only           Remove private AS number from outbound updates

  reflect-client           Configure a peer as a route reflector client

  route-limit              Number of routes limited from this peer

  route-policy             Apply routing policy

  route-update-interval    Route update interval

Thank in advance