Cannot get NTP correct on 2911 Router or 2960 switch

jasonfaas · ‎03-10-2024

Evening all. I have a project that I am doing and I am trying to get ntp set up but it just wont do it, despite multiple configuration attempts. I have a router (2911) connected to a switch (2960) thats connected to the NTP server. I set the NTP server to on, made the authentication-key 1 with password cisco1234, and set the time correctly. Then went to the switch and router and did the "ntp server 172.16.0.3 key 1" command along with the "ntp authentication-key 1 md5 cisco1234" command, and then did the "ntp authenticate" command. After all that, running the show ntp associations and show ntp status commands, the clock is still unsynchronized, and the router is not showing anything in the "when" field. I turned on "debug ntp packets" on the router and its not showing anything. What would be the reason its not receiving packets? I did find an access list in there, but I removed it completely just to see and nothing. Here are some outputs:

Router ntp associations:

address ref clock st when poll reach delay offset disp

~172.16.0.3 0.0.0.5 16 - 64 0 0.00 0.00 16000.00

Router ntp status

Clock is unsynchronized, stratum 16, no reference clock

nominal freq is 250.0000 Hz, actual freq is 249.9990 Hz, precision is 2**24

reference time is 00000000.00000000 (00:00:00.000 UTC Mon Jan 1 1990)

clock offset is 0.00 msec, root delay is 0.00 msec

root dispersion is 0.00 msec, peer dispersion is 0.00 msec.

loopfilter state is 'FSET' (Drift set from file), drift is - 0.000001193 s/s system poll interval is 4, never updated.

Router show run:

Building configuration...

Current configuration : 1492 bytes

!

version 15.3

service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname LAN_Router

!

login block-for 60 attempts 3 within 120

!

boot system flash c2900-universalk9-mz.SPA.155-3.M4a.bin

!

enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1

!

no ip cef

no ipv6 cef

!

username admin privilege 15 secret 5 $1$mERr$Z2.xxrML0Ex6XfMInGpq/0

!

license udi pid CISCO2911/K9 sn FTX1524IZ6N

license boot module c2900 technology-package FoundationSuiteK9

!

ip ssh version 2

no ip domain-lookup

ip domain-name ttc.com

!

spanning-tree mode pvst

!

interface GigabitEthernet0/0

no ip address

duplex auto

speed auto

shutdown

!

interface GigabitEthernet0/1

ip address 172.16.0.1 255.255.240.0

duplex auto

speed auto

!

interface GigabitEthernet0/2

no ip address

duplex auto

speed auto

shutdown

!

interface Serial0/0/0

description CONNETION TO ISP GATEWAY

ip address 13.13.13.2 255.255.255.252

!

interface Serial0/0/1

no ip address

clock rate 2000000

shutdown

!

interface Vlan1

no ip address

shutdown

!

router rip

!

ip classless

ip route 0.0.0.0 0.0.0.0 Serial0/0/0

!

ip flow-export version 9

line con 0

exec-timeout 20 0

password 7 0822455D0A16

login

!

line aux 0

!

line vty 0 4

login local

line vty 5 15

login local

ntp authentication-key 1 md5 0822455D0A165445415F 7

ntp authenticate

ntp server 172.16.0.3 key 1

!

end

Switch run

Building configuration...

Current configuration : 2005 bytes

!

version 15.0

service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

!

hostname S1

!

enable secret 5 $1$mERr$9cTjUIEqNGurQiFU.ZeCi1

!

ip ssh version 2

no ip domain-lookup

ip domain-name ttc.com

!

username admin privilege 1 password 7 0822455D0A16

!

spanning-tree mode pvst

spanning-tree extend system-id

!

interface FastEthernet0/1