NTP Issues

[Kaushik Ray]

Hello 

I had a switch which had the configuration as 

ntp server 1.1.1.1

I have to restrict this so did the following --

no ntp server 1.1.1.1

switch(config)#access-list 20 remark NTP-ACL
switch(config)#access-list 20 permit 1.1.1.1
switch(config)#access-list 20 deny any

switch(config)#ntp access-group gr
switch(config)#ntp access-group pe
switch(config)#ntp access-group peer ?
<1-99> Standard IP access list
<1300-1999> Standard IP access list (expanded range)

switch(config)#ntp access-group peer 20

But since then show ntp status comes back as follows--

sh ntp status
Clock is unsynchronized, stratum 16, no reference clock

anything else i need to do?

Thanks in advance.

[douglas.hall · Accepted solution]

You still need to have a configuration entry for the ntp server, e.g.

access-list 20 remark NTP-ACL

access-list 20 permit 1.1.1.1

ntp server 1.1.1.1

ntp access-group peer 20