NTP on ISR4431 sending src addr 0.0.0.0

[Netmart]

Hello,

I am wondering, why ISR4331 send ntp packes with src address 0.0.0.0, though loopback interface is used as src:

ntp source Loopback0
ntp access-group peer 20
ntp server 10.0.0.1
ntp server 10.0.0.2

debugging:
006301: .Mar 6 21:22:29.247: NTP: ntpio_send_ipv4: dst 10.0.0.1, src 0.0.0.0, if_out Loopback0

Please advise.

Thanks,

[AshSe]

Hello @Netmart 

The issue you're experiencing, where the ISR4331 router is sending NTP packets with a source address of 0.0.0.0 despite having configured the ntp source Loopback0 command, is likely due to the fact that the Loopback0 interface does not have an IP address assigned to it or the interface is in a down state.

Hope This Helps!!!

AshSe

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[balaji.bandi]

Can you post show run interface loopback0? (Does this have an IP address, and is it routable ?)

If not, select any other interface with a valid IP address that is routable to reach the NTP Server.

[Netmart]

Thank for your feedback..

The loopback is configured with IP.

And shows up as connected route.

Loopback0              172.17.240.18   YES NVRAM  up                    up  

C        172.17.240.18 is directly connected, Loopback0

interface Loopback0
ip address 172.17.240.18 255.255.255.255