ligang/vpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add L3DSR feature in LB plugin

Browse Source 
L3DSR is used to overcome Layer 2 limitations
of Direct Server Return Load Balancing.
It maps VIP to DSCP bits, and reuse TOS bits to transfer it
to server, and then server will get VIP from DSCP-to-VIP mapping.
Please refer to https://www.nanog.org/meetings/nanog51/presentations/Monday/NANOG51.Talk45.nanog51-Schaumann.pdf

Change-Id: I403ffeadfb04ed0265086eb2dc41f2e17f8f34cb
Signed-off-by: Hongjun Ni <hongjun.ni@intel.com>
This commit is contained in:
Hongjun Ni
2018-01-23 19:17:23 +08:00
parent 91389ac2c2
commit 647f609a11
9 changed files with 281 additions and 95 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
test/test_lb.py
View File

@ -15,6 +15,7 @@ from util import ppp
- IP4 to GRE6 encap
- IP6 to GRE4 encap
- IP6 to GRE6 encap
- IP4 to L3DSR encap
As stated in comments below, GRE has issues with IPv6.
All test cases involving IPv6 are executed, but
@ -94,7 +95,7 @@ class TestLB(VppTestCase):
self.assertEqual(payload_info.src, self.pg0.sw_if_index)
self.assertEqual(str(inner), str(self.info.data[IPver]))
def checkCapture(self, gre4, isv4):
def checkCapture(self, encap, isv4):
self.pg0.assert_nothing_captured()
out = self.pg1.get_capture(len(self.packets))
@ -104,7 +105,7 @@ class TestLB(VppTestCase):
try:
asid = 0
gre = None
if gre4:
if (encap == 'gre4'):
ip = p[IP]
asid = int(ip.dst.split(".")[3])
self.assertEqual(ip.version, 4)
@ -115,7 +116,8 @@ class TestLB(VppTestCase):
self.assertEqual(len(ip.options), 0)
self.assertGreaterEqual(ip.ttl, 64)
gre = p[GRE]
else:
self.checkInner(gre, isv4)
elif (encap == 'gre6'):
ip = p[IPv6]
asid = ip.dst.split(":")
asid = asid[len(asid) - 1]
@ -132,7 +134,15 @@ class TestLB(VppTestCase):
self.assertGreaterEqual(ip.hlim, 64)
# self.assertEqual(len(ip.options), 0)
gre = GRE(str(p[IPv6].payload))
self.checkInner(gre, isv4)
self.checkInner(gre, isv4)
if (encap == 'l3dsr'):
ip = p[IP]
asid = int(ip.dst.split(".")[3])
self.assertEqual(ip.version, 4)
self.assertEqual(ip.flags, 0)
self.assertEqual(ip.dst, "10.0.0.%u" % asid)
self.assertEqual(ip.tos, 0x1c)
self.assertEqual(len(ip.options), 0)
load[asid] += 1
except:
self.logger.error(ppp("Unexpected or invalid packet:", p))
@ -156,7 +166,7 @@ class TestLB(VppTestCase):
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(gre4=True, isv4=True)
self.checkCapture(encap='gre4', isv4=True)
finally:
for asid in self.ass:
@ -176,7 +186,7 @@ class TestLB(VppTestCase):
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(gre4=True, isv4=False)
self.checkCapture(encap='gre4', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli("lb as 2001::/16 10.0.0.%u del" % (asid))
@ -194,7 +204,7 @@ class TestLB(VppTestCase):
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(gre4=False, isv4=True)
self.checkCapture(encap='gre6', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli("lb as 90.0.0.0/8 2002::%u del" % (asid))
@ -212,9 +222,27 @@ class TestLB(VppTestCase):
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(gre4=False, isv4=False)
self.checkCapture(encap='gre6', isv4=False)
finally:
for asid in self.ass:
self.vapi.cli("lb as 2001::/16 2002::%u del" % (asid))
self.vapi.cli("lb vip 2001::/16 encap gre6 del")
self.vapi.cli("test lb flowtable flush")
def test_lb_ip4_l3dsr(self):
""" Load Balancer IP4 L3DSR """
try:
self.vapi.cli("lb vip 90.0.0.0/8 encap l3dsr dscp 7")
for asid in self.ass:
self.vapi.cli("lb as 90.0.0.0/8 10.0.0.%u" % (asid))
self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.checkCapture(encap='l3dsr', isv4=True)
finally:
for asid in self.ass:
self.vapi.cli("lb as 90.0.0.0/8 10.0.0.%u del" % (asid))
self.vapi.cli("lb vip 90.0.0.0/8 encap l3dsr dscp 7 del")
self.vapi.cli("test lb flowtable flush")