Here it is – the outline for the final course in the All-In-One Series for CCIE R&S Version 5. Cannot wait to start these Nuggets!!!
- Course Introduction
- Device Management
- SNMP
- Logging
- QoS
- FHRP
- NTP
- DHCP and DHCPv6
- NAT
- IP SLA
- Object Tracking
- NetFlow
- EEM
- Troubleshooting Services
I sure hope you found this post informative, and I would like to thank you for reading!
Dear Anthony,
Thank you again for the series. That would be great if CCIE Security series could be done in CBT Nuggets after R&S. I’m strongly looking forward for it.
Yes – I really want to make that happen! We will see how well this R&S series continues to do!
Dear Anthony,
I saw the NTP nugget.
I did this config in GNS3:
Server:
c#ntp master 1
Client:
c#ntp authentication-key 1 md5 cisco
c#ntp authenticate
c#ntp trusted-key 1
c#ntp server
It worked while server does not have key.
What do you think about it?
Server:
c#ntp master 1
Client:
c#ntp authentication-key 1 md5 cisco
c#ntp authenticate
c#ntp trusted-key 1
c#ntp server IP
Yeah – awesome work – here is a Brian M blog post about it that is killer. http://www.ine.com/resources/ntp-authentication.htm
Dear Anthony,
Thank you for your reply.
Sorry; I missed “key NUMBER” after “ntp server IP” and although I had other authentication commands, ntp formed without authentication. It is odd.
One more thing:
I did the config you suggested but it is not worked.
Here it is:
R2:
c#ntp authentication-key 1 md5 cisco
c#ntp master 1
R1:
c#ntp authentication-key 1 md5 cisco
c#ntp authenticate
c#ntp trusted-key 1
c#ntp server 12.12.12.2 key 1
R1#sh ntp associations detail
12.12.12.2 configured, ipv4, authenticated, insane, invalid, unsynced, stratum 16
I added “ntp trusted-key 1” on the server and then it worked.
I found that without “ntp trusted-key 1” on the server it is not working and with it, it works immediately.
I have tested it many times with three different IOSes.
Here is the working config for me:
R2:
c#ntp authentication-key 1 md5 cisco
c#ntp trusted-key 1
c#ntp master 1
R1:
c#ntp authentication-key 1 md5 cisco
c#ntp authenticate
c#ntp trusted-key 1
c#ntp server 12.12.12.2 key 1
R1#sh ntp associations detail
12.12.12.2 configured, ipv4, authenticated, our_master, sane, valid, stratum 1
What do you think about it?