def synthesize_vif_bgp_route(self,
mac_address,
ip_prefix,
plen,
label,
lb_consistent_hash_order,
route_distinguisher=None,
local_pref=None):
rd = route_distinguisher if route_distinguisher else self.instance_rd
route_entry = self.generate_vif_bgp_route(mac_address, ip_prefix, plen,
label, rd)
assert isinstance(route_entry, engine.RouteEntry)
route_entry.attributes.add(self._gen_encap_extended_communities())
route_entry.set_route_targets(self.export_rts)
ecommunities = exa.ExtendedCommunities()
ecommunities.communities.append(
exa.ConsistentHashSortOrder(lb_consistent_hash_order))
route_entry.attributes.add(ecommunities)
route_entry.attributes.add(
exa.LocalPreference(local_pref or DEFAULT_LOCAL_PREF))
self.log.debug("Synthesized Vif route entry: %s", route_entry)
return route_entry
def _route_for_readvertisement(self, route, label, rd,
lb_consistent_hash_order,
do_default=False):
prefix = "0.0.0.0/0" if do_default else route.nlri.cidr.prefix()
nlri = self._nlri_from(prefix, label, rd)
attributes = exa.Attributes()
# new RTRecord = original RTRecord (if any) + orig RTs converted into
# RTRecord attributes
orig_rtrecords = route.ecoms(exa.RTRecord)
rts = route.ecoms(exa.RTExtCom)
add_rtrecords = [exa.RTRecord.from_rt(rt) for rt in rts]
final_rtrecords = list(set(orig_rtrecords) | set(add_rtrecords))
ecoms = self._gen_encap_extended_communities()
ecoms.communities += final_rtrecords
ecoms.communities.append(
exa.ConsistentHashSortOrder(lb_consistent_hash_order))
attributes.add(ecoms)
entry = engine.RouteEntry(nlri, self.readvertise_to_rts, attributes)
self.log.debug("RouteEntry for (re-)advertisement: %s", entry)
return entry
def _default_route_for_advertisement(self, endpoint):
label, rd, lb_consistent_hash_order = (
self._get_route_params_for_endpoint(endpoint))
self.log.debug(
"Default route (re-)advertisement with label %s and "
"route distinguisher %s", label, rd)
nlri = self._nlri_from(DEFAULT_ADDR_PREFIX, label, rd)
attributes = exa.Attributes()
ecoms = self._gen_encap_extended_communities()
ecoms.communities.append(
exa.ConsistentHashSortOrder(lb_consistent_hash_order))
attributes.add(ecoms)
entry = engine.RouteEntry(nlri, self.readvertise_to_rts, attributes)
self.log.debug("RouteEntry for default prefix advertisement: %s",
entry)
return entry
def _route_for_readvertisement(self, route, endpoint):
label, rd, lb_consistent_hash_order = (
self._get_route_params_for_endpoint(endpoint))
self.log.debug(
"Prefix %s (re-)advertisement with label %s and route "
"distinguisher %s", route.nlri.cidr.prefix(), label, rd)
nlri = self._nlri_from(route.nlri.cidr.prefix(), label, rd)
attributes = exa.Attributes()
ecoms = self._gen_encap_extended_communities()
ecoms.communities += (self._gen_rtrecords_extended_community(
route.ecoms))
ecoms.communities.append(
exa.ConsistentHashSortOrder(lb_consistent_hash_order))
attributes.add(ecoms)
entry = engine.RouteEntry(nlri, self.readvertise_to_rts, attributes)
self.log.debug("RouteEntry for (re-)advertisement: %s", entry)
return entry