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bgp: enable nexthop_self for locally generated routes

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Signed-off-by: ISHIDA Wataru <ishida.wataru@lab.ntt.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
ISHIDA Wataru 2015-09-08 21:12:43 +09:00 committed by FUJITA Tomonori
parent 969b4b6837
commit 66eeb5b1fe
1 changed files with 7 additions and 13 deletions
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20
ryu/services/protocols/bgp/peer.py
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@ -851,24 +851,18 @@ class Peer(Source, Sink, NeighborConfListener, Activity):
nlri_list = [path.nlri]
# By default we use BGPS's interface IP with this peer as next_hop.
next_hop = self._session_next_hop(path)
if path.is_local() and path.has_nexthop():
if self.is_ebgp_peer():
next_hop = self._session_next_hop(path)
if path.is_local() and path.has_nexthop():
next_hop = path.nexthop
else:
next_hop = path.nexthop
# If this is a iBGP peer.
if not self.is_ebgp_peer() and not path.is_local():
# If the path came from a bgp peer and not from NC, according
# to RFC 4271 we should not modify next_hop.
# However RFC 4271 allows us to change next_hop
# RFC 4271 allows us to change next_hop
# if configured to announce its own ip address.
if self._neigh_conf.is_next_hop_self:
next_hop = self.host_bind_ip
if path.route_family == RF_IPv6_VPN:
next_hop = self._ipv4_mapped_ipv6(next_hop)
next_hop = self._session_next_hop(path)
LOG.debug('using %s as a next_hop address instead'
' of path.nexthop %s', next_hop, path.nexthop)
else:
next_hop = path.nexthop
nexthop_attr = BGPPathAttributeNextHop(next_hop)
assert nexthop_attr, 'Missing NEXTHOP mandatory attribute.'