Re: GNS3 ntp master crashing my PC

Thanks Hammer! I don't understand why yours is working and mine is not, our
configs look exactly the same. I played around with this again some more
this morning. I was able to insert my 2500 access server into my lab
topology and use it as an ntp master. If I use my real 2500 as an ntp master
and one of my real 3560 switches as ntp client, everything works great. I
then try to use one of my virtual routers from GNS3 as an ntp client to my
real ntp master and my virtual ntp client router locks up. I had thought
originally it was just the virtual ntp master that would lock up, but it is
also a virtual ntp client that will lock up as well, it just seems to take
longer.

I really don't get this. I have tried this in Windows and Ubuntu on
two different computers with several diffrent ios versions. Unless somebody
has any idea on how to fix this, I am just going to have to move forward
doing all my ntp with real hardware. Obviously this is not the best
situation, but at least I can play around with it. I was starting to loose
my confidence in my ability to do ntp. :(

I also messed up one of my 2500 routers doing an ios upgrade for this, but
that is for a different thread.

On Wed, Sep 8, 2010 at 11:47 AM, --Hammer-- <bhmccie_at_gmail.com> wrote:

> Nathan,
> I didn't get to test this last night on the home system but I
> checked it today on a junk server with a few routers and had no issues.
> I'm running less than 20% utilization on my server without tuning or
> anything. This server is an Ubuntu 10.04 LTS workstation.
>
> RTR1(config)#
> RTR1(config)#do sho ver | in IOS
> Cisco IOS Software, 7200 Software (C7200-JK9O3S-M), Version 12.4(25),
> RELEASE SOFTWARE (fc2)
> RTR1(config)#
> RTR1(config)#
> RTR1(config)#do sho ip int br | ex un
> Interface IP-Address OK? Method
> Status Protocol
> FastEthernet0/0 1.1.1.1 YES manual
> up up
> Loopback0 11.11.11.11 YES manual
> up up
> RTR1(config)#
> RTR1(config)#
> RTR1(config)#do sho run | in ntp
> ntp master 1
> ntp update-calendar
> RTR1(config)#
> RTR1(config)#do sho ntp asso
>
> address ref clock st when poll reach delay
> offset disp
> *~127.127.7.1 .LOCL. 0 59 64 377 0.0
> 0.00 0.0
> * master (synced), # master (unsynced), + selected, - candidate, ~
> configured
> RTR1(config)#
> RTR1(config)#do sho ntp statu
> Clock is synchronized, stratum 1, reference is .LOCL.
> nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**18
> reference time is D0320CD1.D9DE88F2 (13:23:29.851 UTC Wed Sep 8 2010)
> clock offset is 0.0000 msec, root delay is 0.00 msec
> root dispersion is 0.02 msec, peer dispersion is 0.02 msec
> RTR1(config)#
> RTR1(config)#do sho run | s ospf
> router ospf 5
> log-adjacency-changes
> network 1.1.1.0 0.0.0.255 area 5
> network 11.11.11.11 0.0.0.0 area 5
> RTR1(config)#do sho ip ospf ne
>
> Neighbor ID Pri State Dead Time Address Interface
> 22.22.22.22 1 FULL/DR 00:00:36 1.1.1.2
> FastEthernet0/0
> RTR1(config)#
>
>
> ----------------------------------------------------------------------------------------------------------------
>
> RTR2(config)#
> RTR2(config)#do sho ver | in IOS
> Cisco IOS Software, 7200 Software (C7200-JK9O3S-M), Version 12.4(25),
> RELEASE SOFTWARE (fc2)
> RTR2(config)#
> RTR2(config)#do sho ip int br | ex un
> Interface IP-Address OK? Method
> Status Protocol
> FastEthernet1/0 1.1.1.2 YES manual
> up up
> Loopback0 22.22.22.22 YES manual
> up up
> RTR2(config)#
> RTR2(config)#do sho run | in ntp
> ntp clock-period 17179867
> ntp server 1.1.1.1
> RTR2(config)#
> RTR2(config)#do sho ntp asso
>
> address ref clock st when poll reach delay
> offset disp
> *~1.1.1.1 .LOCL. 1 57 64 377 5.4
> -1.38 3.8
> * master (synced), # master (unsynced), + selected, - candidate, ~
> configured
> RTR2(config)#
> RTR2(config)#do sho ntp statu
> Clock is synchronized, stratum 2, reference is 1.1.1.1
> nominal freq is 250.0000 Hz, actual freq is 250.0000 Hz, precision is 2**18
> reference time is D0320D11.1EC62020 (13:24:33.120 UTC Wed Sep 8 2010)
> clock offset is -1.3847 msec, root delay is 5.43 msec
> root dispersion is 5.17 msec, peer dispersion is 3.75 msec
> RTR2(config)#
> RTR2(config)#do sho run | s ospf
> router ospf 5
> log-adjacency-changes
> network 1.1.1.0 0.0.0.255 area 5
> network 22.22.22.22 0.0.0.0 area 5
> RTR2(config)#
> RTR2(config)#do sho ip ospf ne
>
> Neighbor ID Pri State Dead Time Address Interface
> 11.11.11.11 1 FULL/BDR 00:00:35 1.1.1.1
> FastEthernet1/0
> RTR2(config)#
>
> --Hammer--
>
>
> On 9/7/2010 9:57 AM, Nathan Pease wrote:
> > Thanks for looking at this for me. I just confirmed that it will also
> > happen when running eigrp or no routing protocol at all.
> >
> > On Tue, Sep 7, 2010 at 7:28 AM, --Hammer-- <bhmccie_at_gmail.com
> > <mailto:bhmccie_at_gmail.com>> wrote:
> >
> > I can't get to my Ubuntu setup today but I have a Debian setup at
> > home and I will try it out this evening and get back with you.
> >
> > Debian server
> > |
> > .1q
> > |
> > breakout 3750
> > |
> > 4x 3560s
> >
> >
> > --Hammer--
> >
> >
> > On 9/7/2010 9:22 AM, Nathan Pease wrote:
> >> Thanks Hammer! Are you running ntp master and ospf on the same
> >> router? I have tried this on my server and my laptop in both
> >> Windows and Ubuntu. I just
> >> downloaded c7200-adventerprisek9-mz.150-1.M3.bin thinking that
> >> going to 15.0 ios would help, but I get the same result every time.
> >>
> >> The only thing they all have in common is that I run ntp master
> >> and have ospf adjacencies. I have tried this on a very simple
> >> three router ospf network. Those were the only two protocols
> >> running, but my ospf adjacencies begin flapping as soon as I do
> >> ntp master on one of my routers.
> >>
> >> On Tue, Sep 7, 2010 at 6:44 AM, --Hammer-- <bhmccie_at_gmail.com
> >> <mailto:bhmccie_at_gmail.com>> wrote:
> >>
> >> Running NTP labs on my Ubuntu install has no issues.
> >>
> >> --Hammer--
> >>
> >>
> >>
> >> On 9/6/2010 4:54 PM, Matthew George wrote:
> >>
> >> I think this may be just a Windows issue.
> >>
> >> -Matt George
> >>
> >> -----Original Message-----
> >> From: nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>
> >> [mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>] On Behalf Of
> >> garry baker
> >> Sent: Monday, September 06, 2010 5:25 PM
> >> To: Nadeem Rafi
> >> Cc: Cisco certification
> >> Subject: Re: GNS3 ntp master crashing my PC
> >>
> >> running 3725 12.4(15)T12 on Ubuntu and do not see any
> >> issues with this with
> >> GNS3 0.6.1 and dynamips 0.2.8-RC2...
> >>
> >> thanks..
> >> garry..
> >>
> >> --
> >> Garry L. Baker
> >>
> >> "There is no 'patch' for stupidity." -
> >> www.sqlsecurity.com <http://www.sqlsecurity.com>
> >>
> >>
> >> On Mon, Sep 6, 2010 at 11:58 AM, Nadeem
> >> Rafi<nrafia_at_gmail.com <mailto:nrafia_at_gmail.com>> wrote:
> >>
> >> never seen such issue on my GNS3/Dynamips.........
> >>
> >> On Mon, Sep 6, 2010 at 8:00 PM, Matthew
> >> George<mgeorge_at_geores.net
> >> <mailto:mgeorge_at_geores.net>> wrote:
> >>
> >> When writing the NTP labs for my website I
> >> noticed the same issue.
> >>
> >> Anytime
> >>
> >> I
> >> attempted to configure an NTP master on dynamips
> >> the processor
> >>
> >> utilization
> >>
> >> maxes out and the router freezes up.
> >>
> >> When trying to change the idle pc value the only
> >> one available was
> >>
> >> 0x000000
> >>
> >> [1000]
> >>
> >> The only way around this seems to be to use real
> >> hardware or skip
> >> the NTP labs.
> >>
> >> -Matt George
> >>
> >> -----Original Message-----
> >> From: nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>
> >> [mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>] On Behalf
> >> Of Radioactive Frog
> >> Sent: Monday, September 06, 2010 7:51 AM
> >> To: Nathan Pease
> >> Cc: ccielab_at_groupstudy.com
> >> <mailto:ccielab_at_groupstudy.com>
> >> Subject: Re: GNS3 ntp master crashing my PC
> >>
> >> Does your PC CPU utilization goes high when you
> >> turn NTP master on?
> >>
> >>
> >> On Mon, Sep 6, 2010 at 7:58 AM, Nathan Pease
> >> <pease.nathan_at_gmail.com
> >> <mailto:pease.nathan_at_gmail.com>>
> >> wrote:
> >>
> >> Does anyone have issues when using GNS3 to do
> >> ntp labs? As soon as
> >> I put ntp master on a router in GNS3, it
> >> starts freezing up and
> >> loosing adjacencies.
> >> I
> >> have tried this on windows and Ubuntu as well
> >> as several different
> >> IOS versions and routers in GNS3. Has anyone
> >> had this same experience?
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >>
> __________________________________________________________________
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Received on Thu Sep 09 2010 - 09:20:58 ART