From: Michy Eika (cciemaster@shingor.net)
Date: Sat Apr 22 2006 - 22:05:42 GMT-3
Hi folks!
Hello again. And I wanna supplement my question with network topology.
I'm planning to use NTP. But if I want to configure routers to make it more
robust and secure, I think I should implement authentication and redundant
path to connect NTP server(ntp master router). In this case, do I need to
make loopback interface as source interface on both routers(client and
server router)?
I'm concerned about one of redundant link failure's impact. I wonder what
happens if redundant link failure occurs on NTP server or client. I wonder
the authentication is affected...(and etc...) . I think ntp ACL will be
affected by this circumstance.
|--lo0[R1]s0/0-----[R2]------s0/1[R3]lo0--|
|e0/0 e0/1|
|-----------[R4]-----------|
R1 lo:1.1.1.1
R3 lo:3.3.3.3
* R1 can reach R3 and vice versa.
[R1]
ntp master 3
ntp source Loopback0
ntp authenticate
ntp authentication-key 1234 md5 cisco
ntp trusted-key 1234
[R3]
ntp server 1.1.1.1 key 1234
ntp source Loopback0
ntp authenticate
ntp authentication-key 1234 md5 cisco
ntp trusted-key 1234
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