08-26-2008 08:23 PM - edited 03-06-2019 01:00 AM
Hi There;
Can I use the same layer three switch to act as both a slave to 'get' NTP time from a NTP source and then as a 'master server' to distribute the time it has received from the NTP source to other devices on the network?
Regards
Solved! Go to Solution.
08-26-2008 09:45 PM
Yes it is possible. Have Peer Association of L3 switch with NTP Server & server association of same L3 switch with other network devices ( clients )...
ntp peer ip-address
[normal-sync] [version number]
[key key-id] [source interface]
[prefer]
Forms a peer association
with another system
ntp server ip-address [version
number] [key key-id] [source
interface] [prefer]
Forms a server
association with another
system
----------------------------------------
NTP Global Configuration Commands
!--- For the client:
clock timezone EST -5 ????
ntp source loopback 0 ?????
ntp server ip_address key 1
ntp peer ip_address
!--- This is for a peer association.
ntp authenticate
ntp authentication-key 1 md5 xxxx
ntp trusted-key 1
!--- For the server:
clock timezone EST -5
clock summer-time EDT recurring 1 Sun Apr 3:00 last Sun Oct 3:00
clock calendar-valid
ntp source loopback0
ntp update-calendar
!--- This is optional:
interface vlan_id ntp broadcast
!--- This sends NTP broadcast packets.
ntp broadcast client
!--- This receives NTP broadcast packets.
ntp authenticate
ntp authentication-key 1 md5 xxxxx
ntp trusted-key 1
ntp access-group access-list
!--- This provides further security, if needed.
------------------------------------
HTH...
08-26-2008 09:45 PM
Yes it is possible. Have Peer Association of L3 switch with NTP Server & server association of same L3 switch with other network devices ( clients )...
ntp peer ip-address
[normal-sync] [version number]
[key key-id] [source interface]
[prefer]
Forms a peer association
with another system
ntp server ip-address [version
number] [key key-id] [source
interface] [prefer]
Forms a server
association with another
system
----------------------------------------
NTP Global Configuration Commands
!--- For the client:
clock timezone EST -5 ????
ntp source loopback 0 ?????
ntp server ip_address key 1
ntp peer ip_address
!--- This is for a peer association.
ntp authenticate
ntp authentication-key 1 md5 xxxx
ntp trusted-key 1
!--- For the server:
clock timezone EST -5
clock summer-time EDT recurring 1 Sun Apr 3:00 last Sun Oct 3:00
clock calendar-valid
ntp source loopback0
ntp update-calendar
!--- This is optional:
interface vlan_id ntp broadcast
!--- This sends NTP broadcast packets.
ntp broadcast client
!--- This receives NTP broadcast packets.
ntp authenticate
ntp authentication-key 1 md5 xxxxx
ntp trusted-key 1
ntp access-group access-list
!--- This provides further security, if needed.
------------------------------------
HTH...
08-26-2008 10:39 PM
Ta
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide