Re: NTP Question

limtohsoon · ‎03-31-2005

Hi Sir,

I have the following NTP config on the MSFC of a Catalyst 6509 switch:

------------------------

clock timezone CCT 8

ntp clock-period 17179861

ntp source Vlan179

ntp master 4

ntp server 10.230.4.5

------------------------

The following are outputs of several commands:

switch#sh clock detail

13:23:21.821 CCT Fri Apr 1 2005

Time source is NTP

switch#sh ntp status

Clock is synchronized, stratum 4, reference is 127.127.7.1

nominal freq is 250.0000 Hz, actual freq is 250.0001 Hz, precision is 2**24

reference time is C5F75961.430E0270 (13:23:45.261 CCT Fri Apr 1 2005)

clock offset is 0.0000 msec, root delay is 0.00 msec

root dispersion is 0.02 msec, peer dispersion is 0.02 msec

switch#sh ntp associations detail

10.230.4.5 configured, insane, invalid, stratum 2

ref ID 133.100.9.2, time C5EE8A30.9318BAC7 (21:01:36.574 CCT Fri Mar 25 2005)

our mode client, peer mode server, our poll intvl 64, peer poll intvl 256

root delay 125.29 msec, root disp 3.92, reach 0, sync dist 8879.425

delay 0.61 msec, offset 1.4675 msec, dispersion 16000.00

precision 2**18, version 3

org time 00000000.00000000 (08:00:00.000 CCT Mon Jan 1 1900)

rcv time 00000000.00000000 (08:00:00.000 CCT Mon Jan 1 1900)

xmt time C5F75C65.43029AB5 (13:36:37.261 CCT Fri Apr 1 2005)

filtdelay = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

filtoffset = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

filterror = 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0

127.127.7.1 configured, our_master, sane, valid, stratum 3

ref ID 127.127.7.1, time C5F75C61.42FC15EA (13:36:33.261 CCT Fri Apr 1 2005)

our mode active, peer mode passive, our poll intvl 64, peer poll intvl 64

root delay 0.00 msec, root disp 0.00, reach 377, sync dist 0.015

delay 0.00 msec, offset 0.0000 msec, dispersion 0.02

precision 2**18, version 3

org time C5F75C61.42FC15EA (13:36:33.261 CCT Fri Apr 1 2005)

rcv time C5F75C61.42FC15EA (13:36:33.261 CCT Fri Apr 1 2005)

xmt time C5F75C61.42FB9D02 (13:36:33.261 CCT Fri Apr 1 2005)

filtdelay = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

filtoffset = 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

filterror = 0.02 0.99 1.97 2.94 3.92 4.90 5.87 6.85

Reference clock status: Running normally

Timecode:

My question is, why is it not referencing 10.230.4.5? I could ping 10.230.4.5, sourced from interface Vlan179 IP address.

Please help.

B.Rgds,

Lim TS

drussell · ‎03-31-2005

Take out the "ntp master 4" command. it is setting your MSFC as the master clock.

sbhadrav@cisco.com · ‎04-13-2018

These are the different types of configurations available for MSFC redundancy on a single Catalyst 6500 and 6000 chassis operating in hybrid mode. This runs Catalyst OS (CatOS) on the Supervisor and Cisco IOS Software on the MSFC:

Dual router mode redundancy makes use of HSRP. Both the MSFCs can be active at the same time and establish routing protocol peer relationships with other routers. If one MSFC fails, the other MSFC takes over using the HSRP mechanism. This method can also be used to provide load sharing of VLAN traffic by using a single chassis.

In single router mode redundancy, only one of the MSFCs is active and it establishes routing protocol peer relationships with other routers. The other MSFC takes over if the active MSFC fails. This method cannot provide load sharing capability using a single chassis.
Apart from the redundancy options available for MSFC on the same chassis, HSRP can also be used to provide MSFC redundancy and load sharing. This occurs when HSRP is available on Supervisors on a multiple chassis, just like a normal router-based network.

Certain requirements must be met for single chassis MSFC redundancy. Both the MSFCs must have identical configuration, except for HSRP and other network layer parameters like IP and Internetwork Packet Exchange (IPX) addresses, which have to be unique. This condition is due to the concept of designated MSFC, which programs the ASIC on the active Supervisor Engine for forwarding traffic. The designated MSFC is the one that comes up first (or has been up the longest), and it can either be the one in slot 1 or slot 2.