Hi Experts,
I need your help to understand the logic behind the NTP access restriction. I learned that, NTP access-list as follows:
1. peer - Allows time requests and NTP control queries and allows the switch to synchronize itself to a device whose address passes the access list criteria.
2. serve - Allows time requests and NTP control queries, but does not allow the switch to synchronize itself to a device whose address passes the access list criteria.
3. serve-only - Allows only time requests from a device whose address passes the access list criteria.
4. query-only - Allows only NTP control queries from a device whose address passes the access list criteria.
Okay with this above explanation, I want to know
1. What is NTP control queries
2. When access-group "serve" is configured in ROUTER-A, the defination states that it will "allow time request and control queries but does not allow the switch to synchronize itself to a device". How it is possible to provie time to a device without synchronizing with it?
Can you please help me in clarifying this
Sairam
