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fib: fib api updates

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Enhance the route add/del APIs to take a set of paths rather than just one.
Most unicast routing protocols calcualte all the available paths in one
run of the algorithm so updating all the paths at once is beneficial for the client.
two knobs control the behaviour:
  is_multipath - if set the the set of paths passed will be added to those
                 that already exist, otherwise the set will replace them.
  is_add - add or remove the set

is_add=0, is_multipath=1 and an empty set, results in deleting the route.

It is also considerably faster to add multiple paths at once, than one at a time:

vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.11
100000 routes in .572240 secs, 174751.80 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.12
100000 routes in .528383 secs, 189256.54 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.13
100000 routes in .757131 secs, 132077.52 routes/sec
vat# ip_add_del_route 1.1.1.1/32 count 100000 multipath via 10.10.10.14
100000 routes in .878317 secs, 113854.12 routes/sec

vat# ip_route_add_del 1.1.1.1/32 count 100000 multipath via 10.10.10.11 via 10.10.10.12 via 10.10.10.13 via 10.10.10.14
100000 routes in .900212 secs, 111084.93 routes/sec

Change-Id: I416b93f7684745099c1adb0b33edac58c9339c1a
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Signed-off-by: Ole Troan <ot@cisco.com>
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
This commit is contained in:
Neale Ranns
2018-05-01 05:17:55 -07:00
committed by Ole Trøan
parent 39baa32186
commit 097fa66b98
133 changed files with 4883 additions and 5081 deletions
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20
test/test_vxlan_gpe.py
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@ -10,6 +10,8 @@ from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP
from scapy.layers.vxlan import VXLAN
from scapy.utils import atol
from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_ip import INVALID_INDEX
@unittest.skipUnless(running_extended_tests, "part of extended tests")
@ -80,16 +82,20 @@ class TestVxlanGpe(BridgeDomain, VppTestCase):
@classmethod
def create_vxlan_gpe_flood_test_bd(cls, vni, n_ucast_tunnels):
# Create 10 ucast vxlan_gpe tunnels under bd
# Create 10 ucast vxlan tunnels under bd
ip_range_start = 10
ip_range_end = ip_range_start + n_ucast_tunnels
next_hop_address = cls.pg0.remote_ip4n
for dest_ip4n in ip4n_range(next_hop_address, ip_range_start,
ip_range_end):
next_hop_address = cls.pg0.remote_ip4
for dest_ip4 in ip4_range(next_hop_address, ip_range_start,
ip_range_end):
# add host route so dest_ip4n will not be resolved
cls.vapi.ip_add_del_route(dst_address=dest_ip4n,
dst_address_length=32,
next_hop_address=next_hop_address)
rip = VppIpRoute(cls, dest_ip4, 32,
[VppRoutePath(next_hop_address,
INVALID_INDEX)],
register=False)
rip.add_vpp_config()
dest_ip4n = socket.inet_pton(socket.AF_INET, dest_ip4)
r = cls.vapi.vxlan_gpe_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=dest_ip4n,