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ip: Router ID included in flow hash

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Type: feature

A device/router needs to have a unique ID which is included in the flow
has so that flows are not polarised through the network, i.e. each deice
in the network chooses the same nth link for the same flow.

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: I963e03674adbb085902b4084fdc4886b88f5734c
This commit is contained in:
Neale Ranns
2021-01-22 16:12:38 +00:00
committed by Ole Tr�an
parent 86c7ff6a4c
commit 3d5f08a825
12 changed files with 122 additions and 29 deletions
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26
test/test_ip6.py
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@ -1943,9 +1943,12 @@ class TestIP6LoadBalance(VppTestCase):
def send_and_expect_load_balancing(self, input, pkts, outputs):
self.pg_send(input, pkts)
rxs = []
for oo in outputs:
rx = oo._get_capture(1)
self.assertNotEqual(0, len(rx))
rxs.append(rx)
return rxs
def send_and_expect_one_itf(self, input, pkts, itf):
self.pg_send(input, pkts)
@ -2044,16 +2047,31 @@ class TestIP6LoadBalance(VppTestCase):
# be guaranteed. But with 64 different packets we do expect some
# balancing. So instead just ensure there is traffic on each link.
#
self.send_and_expect_load_balancing(self.pg0, port_ip_pkts,
[self.pg1, self.pg2])
rx = self.send_and_expect_load_balancing(self.pg0, port_ip_pkts,
[self.pg1, self.pg2])
n_ip_pg0 = len(rx[0])
self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, port_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
[self.pg1, self.pg2])
self.send_and_expect_load_balancing(self.pg0, port_mpls_neos_pkts,
[self.pg1, self.pg2])
rx = self.send_and_expect_load_balancing(self.pg0, port_mpls_neos_pkts,
[self.pg1, self.pg2])
n_mpls_pg0 = len(rx[0])
#
# change the router ID and expect the distribution changes
#
self.vapi.set_ip_flow_hash_router_id(router_id=0x11111111)
rx = self.send_and_expect_load_balancing(self.pg0, port_ip_pkts,
[self.pg1, self.pg2])
self.assertNotEqual(n_ip_pg0, len(rx[0]))
rx = self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
[self.pg1, self.pg2])
self.assertNotEqual(n_mpls_pg0, len(rx[0]))
#
# The packets with Entropy label in should not load-balance,