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Revert "Revert "[config]: Loopback Interface changes for multi ASIC d…
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…evices (sonic-net#4825)""

This reverts commit 5f31842.
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@arlakshm
arlakshm committed Jul 4, 2020
1 parent 405033b commit fc5b2f4
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Showing 6 changed files with 120 additions and 16 deletions.
16 changes: 15 additions & 1 deletion dockers/docker-fpm-frr/frr/bgpd/bgpd.main.conf.j2
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ ipv6 prefix-list PL_LoopbackV6 permit {{ get_ipv6_loopback_address(LOOPBACK_INTE
{% endif %}
!
!
{% if DEVICE_METADATA['localhost']['sub_role'] == 'FrontEnd' %}
{% if multi_asic() %}
route-map HIDE_INTERNAL permit 10
set community local-AS
!
Expand All @@ -38,16 +38,30 @@ router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
{% endif %}
!
{# set router-id #}
{% if multi_asic() %}
bgp router-id {{ get_ipv4_loopback_address(LOOPBACK_INTERFACE, "Loopback4096") | ip }}
{% else %}
bgp router-id {{ get_ipv4_loopback_address(LOOPBACK_INTERFACE, "Loopback0") | ip }}
{% endif %}
!
{# advertise loopback #}
network {{ get_ipv4_loopback_address(LOOPBACK_INTERFACE, "Loopback0") | ip }}/32
{% if multi_asic() %}
network {{ get_ipv4_loopback_address(LOOPBACK_INTERFACE, "Loopback4096") | ip }}/32 route-map HIDE_INTERNAL
{% endif %}
!
{% if get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback0") != 'None' %}
address-family ipv6
network {{ get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback0") | ip }}/64
exit-address-family
{% endif %}
{% if multi_asic() %}
{% if get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback4096") != 'None' %}
address-family ipv6
network {{ get_ipv6_loopback_address(LOOPBACK_INTERFACE, "Loopback4096") | ip }}/64 route-map HIDE_INTERNAL
exit-address-family
{% endif %}
{% endif %}
{% endblock bgp_init %}
!
{% block vlan_advertisement %}
Expand Down
32 changes: 25 additions & 7 deletions src/sonic-config-engine/minigraph.py
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Original file line number Diff line number Diff line change
Expand Up @@ -251,6 +251,15 @@ def parse_asic_png(png, asic_name, hostname):
devices[name] = device_data
return (neighbors, devices, port_speeds)

def parse_loopback_intf(child):
lointfs = child.find(str(QName(ns, "LoopbackIPInterfaces")))
lo_intfs = {}
for lointf in lointfs.findall(str(QName(ns1, "LoopbackIPInterface"))):
intfname = lointf.find(str(QName(ns, "AttachTo"))).text
ipprefix = lointf.find(str(QName(ns1, "PrefixStr"))).text
lo_intfs[(intfname, ipprefix)] = {}
return lo_intfs

def parse_dpg(dpg, hname):
aclintfs = None
mgmtintfs = None
Expand All @@ -269,7 +278,6 @@ def parse_dpg(dpg, hname):
"""
if mgmtintfs is None and child.find(str(QName(ns, "ManagementIPInterfaces"))) is not None:
mgmtintfs = child.find(str(QName(ns, "ManagementIPInterfaces")))

hostname = child.find(str(QName(ns, "Hostname")))
if hostname.text.lower() != hname.lower():
continue
Expand All @@ -290,12 +298,7 @@ def parse_dpg(dpg, hname):
ipprefix = ipintf.find(str(QName(ns, "Prefix"))).text
intfs[(intfname, ipprefix)] = {}

lointfs = child.find(str(QName(ns, "LoopbackIPInterfaces")))
lo_intfs = {}
for lointf in lointfs.findall(str(QName(ns1, "LoopbackIPInterface"))):
intfname = lointf.find(str(QName(ns, "AttachTo"))).text
ipprefix = lointf.find(str(QName(ns1, "PrefixStr"))).text
lo_intfs[(intfname, ipprefix)] = {}
lo_intfs = parse_loopback_intf(child)

mvrfConfigs = child.find(str(QName(ns, "MgmtVrfConfigs")))
mvrf = {}
Expand Down Expand Up @@ -452,6 +455,13 @@ def parse_dpg(dpg, hname):
return intfs, lo_intfs, mvrf, mgmt_intf, vlans, vlan_members, pcs, pc_members, acls, vni
return None, None, None, None, None, None, None, None, None, None

def parse_host_loopback(dpg, hname):
for child in dpg:
hostname = child.find(str(QName(ns, "Hostname")))
if hostname.text.lower() != hname.lower():
continue
lo_intfs = parse_loopback_intf(child)
return lo_intfs

def parse_cpg(cpg, hname):
bgp_sessions = {}
Expand Down Expand Up @@ -826,6 +836,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None, hw
cloudtype = None
hostname = None
linkmetas = {}
host_lo_intfs = None

# hostname is the asic_name, get the asic_id from the asic_name
if asic_name is not None:
Expand Down Expand Up @@ -867,6 +878,7 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None, hw
else:
if child.tag == str(QName(ns, "DpgDec")):
(intfs, lo_intfs, mvrf, mgmt_intf, vlans, vlan_members, pcs, pc_members, acls, vni) = parse_dpg(child, asic_name)
host_lo_intfs = parse_host_loopback(child, hostname)
elif child.tag == str(QName(ns, "CpgDec")):
(bgp_sessions, bgp_asn, bgp_peers_with_range, bgp_monitors) = parse_cpg(child, asic_name)
enable_internal_bgp_session(bgp_sessions, filename, asic_name)
Expand Down Expand Up @@ -930,6 +942,12 @@ def parse_xml(filename, platform=None, port_config_file=None, asic_name=None, hw
for lo_intf in lo_intfs:
results['LOOPBACK_INTERFACE'][lo_intf] = lo_intfs[lo_intf]
results['LOOPBACK_INTERFACE'][lo_intf[0]] = {}

if host_lo_intfs is not None:
for host_lo_intf in host_lo_intfs:
results['LOOPBACK_INTERFACE'][host_lo_intf] = host_lo_intfs[host_lo_intf]
results['LOOPBACK_INTERFACE'][host_lo_intf[0]] = {}

results['MGMT_VRF_CONFIG'] = mvrf

phyport_intfs = {}
Expand Down
3 changes: 3 additions & 0 deletions src/sonic-config-engine/sonic-cfggen
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,7 @@ from sonic_device_util import get_machine_info
from sonic_device_util import get_platform_info
from sonic_device_util import get_system_mac
from sonic_device_util import get_npu_id_from_name
from sonic_device_util import is_multi_npu
from config_samples import generate_sample_config
from config_samples import get_available_config
from swsssdk import SonicV2Connector, ConfigDBConnector, SonicDBConfig
Expand Down Expand Up @@ -344,6 +345,8 @@ def main():
env.filters['ip_network'] = ip_network
for attr in ['ip', 'network', 'prefixlen', 'netmask', 'broadcast']:
env.filters[attr] = partial(prefix_attr, attr)
# Pass the is_multi_npu function as global
env.globals['multi_asic'] = is_multi_npu
template = env.get_template(template_file)
print(template.render(sort_data(data)))

Expand Down
16 changes: 12 additions & 4 deletions src/sonic-config-engine/sonic_device_util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -44,12 +44,20 @@ def get_npu_id_from_name(npu_name):
else:
return None

def get_asic_conf_file_path(platform):
asic_conf_path_candidates = []
asic_conf_path_candidates.append(os.path.join('/usr/share/sonic/platform', ASIC_CONF_FILENAME))
if platform is not None:
asic_conf_path_candidates.append(os.path.join(SONIC_DEVICE_PATH, platform, ASIC_CONF_FILENAME))
for asic_conf_file_path in asic_conf_path_candidates:
if os.path.isfile(asic_conf_file_path):
return asic_conf_file_path
return None

def get_num_npus():
platform = get_platform_info(get_machine_info())
if not platform:
return 1
asic_conf_file_path = os.path.join(SONIC_DEVICE_PATH, platform, ASIC_CONF_FILENAME)
if not os.path.isfile(asic_conf_file_path):
asic_conf_file_path = get_asic_conf_file_path(platform)
if asic_conf_file_path is None:
return 1
with open(asic_conf_file_path) as asic_conf_file:
for line in asic_conf_file:
Expand Down
40 changes: 36 additions & 4 deletions src/sonic-config-engine/tests/multi_npu_data/sample-minigraph.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -387,12 +387,20 @@
<a:LoopbackIPInterface>
<ElementType>LoopbackInterface</ElementType>
<Name>HostIP</Name>
<AttachTo>Loopback0</AttachTo>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
<b:IPPrefix>8.0.0.0/32</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>8.0.0.0/32</a:PrefixStr>
</a:LoopbackIPInterface>
<a:LoopbackIPInterface>
<Name>HostIP1</Name>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.Evolution">
<b:IPPrefix>FD00:1::32/128</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>FD00:1::32/128</a:PrefixStr>
</a:LoopbackIPInterface>
</LoopbackIPInterfaces>
<ManagementIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
<ManagementVIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
Expand Down Expand Up @@ -457,12 +465,20 @@
<a:LoopbackIPInterface>
<ElementType>LoopbackInterface</ElementType>
<Name>HostIP</Name>
<AttachTo>Loopback0</AttachTo>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
<b:IPPrefix>8.0.0.1/32</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>8.0.0.1/32</a:PrefixStr>
</a:LoopbackIPInterface>
<a:LoopbackIPInterface>
<Name>HostIP1</Name>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.Evolution">
<b:IPPrefix>FD00:2::32/128</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>FD00:2::32/128</a:PrefixStr>
</a:LoopbackIPInterface>
</LoopbackIPInterfaces>
<ManagementIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
<ManagementVIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
Expand Down Expand Up @@ -526,12 +542,20 @@
<a:LoopbackIPInterface>
<ElementType>LoopbackInterface</ElementType>
<Name>HostIP</Name>
<AttachTo>Loopback0</AttachTo>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
<b:IPPrefix>8.0.0.4/32</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>8.0.0.4/32</a:PrefixStr>
</a:LoopbackIPInterface>
<a:LoopbackIPInterface>
<Name>HostIP1</Name>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.Evolution">
<b:IPPrefix>FD00:3::32/128</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>FD00:3::32/128</a:PrefixStr>
</a:LoopbackIPInterface>
</LoopbackIPInterfaces>
<ManagementIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
<ManagementVIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
Expand Down Expand Up @@ -580,12 +604,20 @@
<a:LoopbackIPInterface>
<ElementType>LoopbackInterface</ElementType>
<Name>HostIP</Name>
<AttachTo>Loopback0</AttachTo>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.NetMux">
<b:IPPrefix>8.0.0.5/32</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>8.0.0.5/32</a:PrefixStr>
</a:LoopbackIPInterface>
<a:LoopbackIPInterface>
<Name>HostIP1</Name>
<AttachTo>Loopback4096</AttachTo>
<a:Prefix xmlns:b="Microsoft.Search.Autopilot.Evolution">
<b:IPPrefix>FD00:4::32/128</b:IPPrefix>
</a:Prefix>
<a:PrefixStr>FD00:4::32/128</a:PrefixStr>
</a:LoopbackIPInterface>
</LoopbackIPInterfaces>
<ManagementIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
<ManagementVIPInterfaces xmlns:a="http://schemas.datacontract.org/2004/07/Microsoft.Search.Autopilot.Evolution"/>
Expand Down
29 changes: 29 additions & 0 deletions src/sonic-config-engine/tests/test_multinpu_cfggen.py
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Original file line number Diff line number Diff line change
Expand Up @@ -245,3 +245,32 @@ def test_back_end_asic_acl(self):
argument = "-m {} -p {} -n asic3 --var-json \"ACL_TABLE\"".format(self.sample_graph, self.port_config[3])
output = json.loads(self.run_script(argument))
self.assertDictEqual(output, {})

def test_loopback_intfs(self):
argument = "-m {} --var-json \"LOOPBACK_INTERFACE\"".format(self.sample_graph)
output = json.loads(self.run_script(argument))
self.assertDictEqual(output, {\
"Loopback0": {},
"Loopback0|10.1.0.32/32": {},
"Loopback0|FC00:1::32/128": {}})

# The asic configuration should have 2 loopback interfaces
argument = "-m {} -n asic0 --var-json \"LOOPBACK_INTERFACE\"".format(self.sample_graph)
output = json.loads(self.run_script(argument))
self.assertDictEqual(output, { \
"Loopback0": {},
"Loopback4096": {},
"Loopback0|10.1.0.32/32": {},
"Loopback0|FC00:1::32/128": {},
"Loopback4096|8.0.0.0/32": {},
"Loopback4096|FD00:1::32/128": {}})

argument = "-m {} -n asic3 --var-json \"LOOPBACK_INTERFACE\"".format(self.sample_graph)
output = json.loads(self.run_script(argument))
self.assertDictEqual(output, {\
"Loopback0": {},
"Loopback4096": {},
"Loopback0|10.1.0.32/32": {},
"Loopback0|FC00:1::32/128": {},
"Loopback4096|8.0.0.5/32": {},
"Loopback4096|FD00:4::32/128": {}})

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