This article explains how to synchronize time with NTP on switch, when the NTP server is reachable through routing-instance.
Goals:
Topology
[EX4200] Ge-0/0/4(99.99.99.98):RI *VRF*------------- NTP-SERVER (99.99.99.99)
Configuration
-
NTP configuration:
set system ntp boot-server 99.99.99.98
set system ntp server 99.99.99.98
set system ntp source-address 99.99.99.99 routing-instance VRF-INSTANCE
-
Configure L3 interfaces
set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.1/30
set interfaces ge-0/0/4 unit 0 family inet address 99.99.99.99/24
set interfaces ge-0/0/10 unit 0 family inet address 20.0.0.1/30
-
Leaking routes from default instance (inet.0) to routing instance (<instance-name>.inet.0)
set routing-options interface-routes rib-group inet MASTER->VRF
set routing-instances VRF-INSTANCE routing-options interface-routes rib-group inet VRF->MASTER
set routing-options rib-groups VRF->MASTER import-rib VRF-INSTANCE.inet.0
set routing-options rib-groups VRF->MASTER import-rib inet.0
set routing-options rib-groups MASTER->VRF import-rib inet.0
set routing-options rib-groups MASTER->VRF import-rib VRF-INSTANCE.inet.0
-
Defining the VRF-INSTANCE Routing instance:
set routing-instances VRF-INSTANCE instance-type vrf
set routing-instances VRF-INSTANCE interface ge-0/0/4.0
set routing-instances VRF-INSTANCE route-distinguisher 11:11
set routing-instances VRF-INSTANCE vrf-target target:11:11
{master:0}[edit]
root@EX4200# run show version
fpc0:
--------------------------------------------------------------------------
Hostname: EX4200
Model: ex4200-48p
JUNOS Base OS boot [12.3R11.2]
JUNOS Base OS Software Suite [12.3R11.2]
JUNOS Kernel Software Suite [12.3R11.2]
JUNOS Crypto Software Suite [12.3R11.2]
JUNOS Online Documentation [12.3R11.2]
JUNOS Enterprise Software Suite [12.3R11.2]
JUNOS Packet Forwarding Engine Enterprise Software Suite [12.3R11.2]
JUNOS Routing Software Suite [12.3R11.2]
JUNOS Web Management [12.3R11.2]
JUNOS FIPS mode utilities [12.3R11.2]
{master:0}[edit]
root@EX4200# run show system uptime
fpc0:
--------------------------------------------------------------------------
Current time: 2016-04-22 10:31:40 UTC
System booted: 2016-04-22 08:33:11 UTC (01:58:29 ago)
Protocols started: 2016-04-22 08:35:25 UTC (01:56:15 ago)
Last configured: 2015-12-12 12:16:10 UTC (18w5d 22:15 ago) by root
10:31AM up 1:58, 1 user, load averages: 0.02, 0.07, 0.07
{master:0}[edit]
root@EX4200# show system ntp
boot-server 99.99.99.98;
server 99.99.99.98;
source-address 99.99.99.99 routing-instance VRF;
{master:0}[edit]
root@EX4200# show routing-instances
VRF {
instance-type vrf;
interface ge-0/0/4.0;
route-distinguisher 11:11;
vrf-target target:11:11;
routing-options {
interface-routes {
rib-group inet VRF->MASTER;
}
}
}
{master:0}[edit]
root@EX4200# show routing-options
interface-routes {
rib-group inet MASTER-VRF;
}
rib-groups {
VRF->MASTER {
import-rib [ VRF.inet.0 inet.0 ];
}
MASTER-VRF {
import-rib [ inet.0 VRF.inet.0 ];
}
}
{master:0}[edit]
root@EX4200# run show interfaces terse | match in
Interface Admin Link Proto Local Remote
ge-0/0/0.0 up up inet 10.0.0.1/30
ge-0/0/4.0 up up inet 99.99.99.99/24
ge-0/0/10.0 up up inet 20.0.0.1/30
bme0.32768 up up inet 128.0.0.1/2
lo0.16384 up up inet 127.0.0.1 --> 0/0
{master:0}[edit]
root@EX4200# run show ntp status
status=06e4 leap_none, sync_ntp, 14 events, event_peer/strat_chg,
version="ntpd 4.2.0-a Thu Sep 24 12:49:59 UTC 2015 (1)",
processor="powerpc", system="JUNOS12.3R11.2", leap=00, stratum=5,
precision=-18, rootdelay=96.126, rootdispersion=218.544, peer=38220,
refid=99.99.99.98,
reftime=dac47be2.6b0f418d Fri, Apr 22 2016 10:30:58.418, poll=6,
clock=dac47c24.655b4814 Fri, Apr 22 2016 10:32:04.395, state=4,
offset=-109.841, frequency=125.585, jitter=28.518, stability=105.175
{master:0}[edit]
root@EX4200# run show ntp associations
remote refid st t when poll reach delay offset jitter
==============================================================================
*99.99.99.98 80.80.83.32 4 - 3 16 377 1.140 -249.95 23.599
{master:0}[edit]
root@EX4200# run show route | no-more
inet.0: 7 destinations, 7 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.0.0.0/30 *[Direct/0] 01:56:32
> via ge-0/0/0.0
10.0.0.1/32 *[Local/0] 01:56:42
Local via ge-0/0/0.0
20.0.0.0/30 *[Direct/0] 01:56:33
> via ge-0/0/10.0
20.0.0.1/32 *[Local/0] 01:56:41
Local via ge-0/0/10.0
99.99.99.0/24 *[Direct/0] 01:56:34
> via ge-0/0/4.0
99.99.99.99/32 *[Local/0] 01:56:34
Local via ge-0/0/4.0
224.0.0.22/32 *[IGMP/0] 01:56:46
MultiRecv
VRF-INSTANCE.inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.0.0.0/30 *[Direct/0] 01:56:32
> via ge-0/0/0.0
10.0.0.1/32 *[Local/0] 01:56:32
Local via ge-0/0/0.0
20.0.0.0/30 *[Direct/0] 01:56:33
> via ge-0/0/10.0
20.0.0.1/32 *[Local/0] 01:56:33
Local via ge-0/0/10.0
99.99.99.0/24 *[Direct/0] 01:56:34
> via ge-0/0/4.0
99.99.99.99/32 *[Local/0] 01:56:41
Local via ge-0/0/4.0
{master:0}[edit]
root@EX4200# delete system ntp
{master:0}[edit]
root@EX4200# commit
configuration check succeeds
root@EX4200# run set date ?
Possible completions:
<time> New date and time (YYYYMMDDhhmm.ss)
ntp Set system date and time using Network Time Protocol servers
{master:0}[edit]
root@EX4200# run set date 201512121212.12
Sat Dec 12 12:12:12 UTC 2015
{master:0}[edit]
root@EX4200# run show system uptime
fpc0:
--------------------------------------------------------------------------
Current time: 2015-12-12 12:12:15 UTC
System booted: 2015-12-12 10:10:10 UTC (02:02:05 ago)
Protocols started: 2015-12-12 10:12:24 UTC (01:59:51 ago)
Last configured: 2016-04-22 10:35:01 UTC (-22:-22:-46 ago) by root
12:12PM up 2:02, 1 user, load averages: 0.07, 0.05, 0.06
{master:0}[edit]
root@EX4200# rollback 1
load complete
{master:0}[edit]
root@EX4200# show | compare
[edit system]
+ ntp {
+ boot-server 99.99.99.98;
+ server 99.99.99.98;
+ source-address 99.99.99.99 routing-instance VRF-INSTANCE;
+ }
{master:0}[edit]
root@EX4200# commit
configuration check succeeds
commit complete
{master:0}[edit]
root@EX4200# run start shell
root@EX4200:RE:0% date
Fri Apr 22 10:35:41 UTC 2016 <<<<----
root@EX4200:RE:0% exit
exit
{master:0}[edit]
root@EX4200# run show system uptime
fpc0:
--------------------------------------------------------------------------
Current time: 2016-04-22 10:35:48 UTC <<<<----
System booted: 2016-04-22 08:33:11 UTC (02:02:37 ago)
Protocols started: 2016-04-22 08:35:26 UTC (02:00:22 ago)
Last configured: 2015-12-12 12:12:27 UTC (18w5d 22:23 ago) by root
10:35AM up 2:03, 1 user, load averages: 0.10, 0.06, 0.06
{master:0}[edit]
root@EX4200# run show ntp status
status=0664 leap_none, sync_ntp, 6 events, event_peer/strat_chg, <<<<----
version="ntpd 4.2.0-a Thu Sep 24 12:49:59 UTC 2015 (1)",
processor="powerpc", system="JUNOS12.3R11.2", leap=00, stratum=5,
precision=-18, rootdelay=95.932, rootdispersion=490.130, peer=50324,
refid=99.99.99.98,
reftime=dac47d42.7ab9df0d Fri, Apr 22 2016 10:36:50.479, poll=6,
clock=dac47d53.a0fc5f83 Fri, Apr 22 2016 10:37:07.628, state=4,
offset=0.074, frequency=-93.191, jitter=0.247, stability=0.000
{master:0}[edit]
root@EX4200# run show ntp associations
remote refid st t when poll reach delay offset jitter
==============================================================================
*99.99.99.98 80.80.83.32 4 - 14 16 1 0.946 0.074 0.374
2021-02-14: Removed unwanted configuration.