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[dualtor] Let T0 delay 10 seconds before sending BGP updates (#13082)

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Why I did it
To ensure, that after a BGP startup, dualtor T0 receives BGP updates before sending out BGP updates.
Please refer to sonic-net/SONiC#1161 for more details.

How I did it
add coalesce-time 10000 to the frr bgp startup config.

Signed-off-by: Longxiang Lyu <lolv@microsoft.com>

Signed-off-by: Longxiang Lyu <lolv@microsoft.com>
This commit is contained in:
Longxiang Lyu 2022-12-17 01:57:04 +08:00 committed by GitHub
parent 0dcc7e4651
commit ac5cb4acd9
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 168 additions and 2 deletions
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3
dockers/docker-fpm-frr/frr/bgpd/bgpd.main.conf.j2
View File

@ -62,6 +62,9 @@ router bgp {{ DEVICE_METADATA['localhost']['bgp_asn'] }}
bgp log-neighbor-changes
no bgp default ipv4-unicast
no bgp ebgp-requires-policy
{% if (DEVICE_METADATA is defined) and ('localhost' in DEVICE_METADATA) and ('subtype' in DEVICE_METADATA['localhost']) and (DEVICE_METADATA['localhost']['subtype'].lower() == 'dualtor') %}
coalesce-time 10000
{% endif %}
!
{% if constants.bgp.multipath_relax.enabled is defined and constants.bgp.multipath_relax.enabled %}
bgp bestpath as-path multipath-relax

79
src/sonic-config-engine/tests/sample_output/py2/bgpd_frr_dualtor.conf Normal file
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@ -0,0 +1,79 @@
!
! template: bgpd/bgpd.conf.j2
!
!
! =========== Managed by sonic-cfggen DO NOT edit manually! ====================
! generated by templates/quagga/bgpd.conf.j2 with config DB data
! file: bgpd.conf
!
!
! template: common/daemons.common.conf.j2
!
hostname switch-t0
password zebra
enable password zebra
!
log syslog informational
log facility local4
!
! end of template: common/daemons.common.conf.j2!
agentx
!
!
!
! template: bgpd/bgpd.main.conf.j2
!
! bgp multiple-instance
!
! BGP configuration
!
! TSA configuration
!
ip prefix-list PL_LoopbackV4 permit 10.1.0.32/32
!
ipv6 prefix-list PL_LoopbackV6 permit fc00:1::/64
!
ip prefix-list LOCAL_VLAN_IPV4_PREFIX seq 5 permit 192.168.200.0/27
!
ip prefix-list LOCAL_VLAN_IPV4_PREFIX seq 10 permit 192.168.0.0/27
!
!
!
router bgp 65100
!
bgp log-neighbor-changes
no bgp default ipv4-unicast
no bgp ebgp-requires-policy
coalesce-time 10000
!
bgp bestpath as-path multipath-relax
!
bgp graceful-restart restart-time 240
bgp graceful-restart
bgp graceful-restart preserve-fw-state
bgp graceful-restart select-defer-time 45
!
bgp router-id 10.1.0.32
!
network 10.1.0.32/32
!
address-family ipv6
network fc00:1::32/64
exit-address-family
!
network 192.168.200.1/27
network 192.168.0.1/27
!
!
!
address-family ipv4
maximum-paths 64
exit-address-family
address-family ipv6
maximum-paths 64
exit-address-family
!
! end of template: bgpd/bgpd.main.conf.j2
!!
! end of template: bgpd/bgpd.conf.j2
!

79
src/sonic-config-engine/tests/sample_output/py3/bgpd_frr_dualtor.conf Normal file
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@ -0,0 +1,79 @@
!
! template: bgpd/bgpd.conf.j2
!
!
! =========== Managed by sonic-cfggen DO NOT edit manually! ====================
! generated by templates/quagga/bgpd.conf.j2 with config DB data
! file: bgpd.conf
!
!
! template: common/daemons.common.conf.j2
!
hostname switch-t0
password zebra
enable password zebra
!
log syslog informational
log facility local4
!
! end of template: common/daemons.common.conf.j2!
agentx
!
!
!
! template: bgpd/bgpd.main.conf.j2
!
! bgp multiple-instance
!
! BGP configuration
!
! TSA configuration
!
ip prefix-list PL_LoopbackV4 permit 10.1.0.32/32
!
ipv6 prefix-list PL_LoopbackV6 permit fc00:1::/64
!
ip prefix-list LOCAL_VLAN_IPV4_PREFIX seq 5 permit 192.168.0.0/27
!
ip prefix-list LOCAL_VLAN_IPV4_PREFIX seq 10 permit 192.168.200.0/27
!
!
!
router bgp 65100
!
bgp log-neighbor-changes
no bgp default ipv4-unicast
no bgp ebgp-requires-policy
coalesce-time 10000
!
bgp bestpath as-path multipath-relax
!
bgp graceful-restart restart-time 240
bgp graceful-restart
bgp graceful-restart preserve-fw-state
bgp graceful-restart select-defer-time 45
!
bgp router-id 10.1.0.32
!
network 10.1.0.32/32
!
address-family ipv6
network fc00:1::32/64
exit-address-family
!
network 192.168.0.1/27
network 192.168.200.1/27
!
!
!
address-family ipv4
maximum-paths 64
exit-address-family
address-family ipv6
maximum-paths 64
exit-address-family
!
! end of template: bgpd/bgpd.main.conf.j2
!!
! end of template: bgpd/bgpd.conf.j2
!

9
src/sonic-config-engine/tests/test_frr.py
View File

@ -1,4 +1,5 @@
import filecmp
import json
import os
import subprocess
@ -46,12 +47,14 @@ class TestCfgGen(TestCase):
return output
def run_case(self, template, target):
def run_case(self, template, target, extra_data=None):
template_dir = os.path.join(self.test_dir, '..', '..', '..', 'dockers', 'docker-fpm-frr', "frr")
conf_template = os.path.join(template_dir, template)
constants = os.path.join(self.test_dir, '..', '..', '..', 'files', 'image_config', 'constants', 'constants.yml')
cmd_args = self.t0_minigraph, self.t0_port_config, constants, conf_template, template_dir, self.output_file
cmd = "-m %s -p %s -y %s -t %s -T %s > %s" % cmd_args
if extra_data:
cmd = ("-a '%s' " % json.dumps(extra_data)) + cmd
self.run_script(cmd)
original_filename = os.path.join(self.test_dir, 'sample_output', utils.PYvX_DIR, target)
@ -69,4 +72,6 @@ class TestCfgGen(TestCase):
def test_zebra_frr(self):
self.assertTrue(*self.run_case('zebra/zebra.conf.j2', 'zebra_frr.conf'))
def test_bgpd_frr_dualtor(self):
extra_data = {"DEVICE_METADATA": {"localhost": {"subtype": "DualToR"}}}
self.assertTrue(*self.run_case('bgpd/bgpd.conf.j2', 'bgpd_frr_dualtor.conf', extra_data=extra_data))