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  • Network Time Protocol (Cisco)

    Design & Configure

    Network Time Protocol (Cisco)

    Technology: Network Services

    Area: Network Time Protocol (NTP)

    Vendor: Cisco

    Software: IOS 12.X , 15.X

    Platform: Catalyst Switches, Routers

     

    The Network Time Protocol (NTP) is able to synchronize the time of day between time servers and clients which are distributed so that the events can correlate when receiving system logs and other time-specific events from multiple network devices. NTP uses the User Datagram Protocol (UDP) as its transport protocol.

     

    To configure an NTP server of IP 192.0.2.10 as a time reference:

    switch# configure terminal
    switch(config)# ntp server 192.0.2.10

     

    If NTP server supports authentication, use key command:

    switch(config)# ntp server 192.0.2.10 key Cisco

     

    To configure ntp in ipv6 environment:

    switch(config)# ntp peer 2001:0db8::4101

     

    To verify ntp settings:

     

    switch(config)# show ntp peers
    --------------------------------------------------
    Peer IP Address Serv/Peer
    --------------------------------------------------
    2001:0db8::4101 Peer (configured)
    192.0.2.10 Server (configured)

     

    Use also:

    switch(config)# show ntp association
    switch(config)# show ntp status

     

    Author: Marcin Bialy
     
    Grandmetric