CCIE Pursuit Blog

August 13, 2008

Internetwork Expert Volume II: Lab 12 – Section 10

Section 10 – System Management – 10 Points

10.1 Logging

“Configure r6 to send its logged access-list hits to this device [129.x.46.100].”
“A log message should only be generated once 10 access-list hits have been accumulated.”

The first bit is easy:

Rack16R6(config)#logging 129.16.46.100

The second bit mindfucked me.  I looked through all of the logging option and couldn’t find a match.  That’s because the configuration is a global level ip access-list command.  😦

ip access-list log-update

To set the threshold number of packets that generate a log message if they match an access list, use the ip access-list log-update command in global configuration mode.

Rack16R6(config)#ip access-list log-update threshold ?
<0-2147483647>  Access list log-update threshold (number of hits)

Rack16R6(config)#ip access-list log-update threshold 10

10.2 NTP

Basic NTP task.  r4 and r6 get time from BB1.  r1-3 and sw1 from BB2. r5 and sw2 from BB3.

Don’t overthink this one.  🙂

ntp server

To allow the software clock to be synchronized by a Network Time Protocol (NTP) time server, use the ntp server command in global configuration mode.

Rack16R2#sh ntp status
Clock is synchronized, stratum 5, reference is 192.10.16.254
nominal freq is 249.5901 Hz, actual freq is 249.5901 Hz, precision is 2**18
reference time is CC4DEE0D.A71E36DD (23:34:37.652 UTC Wed Aug 13 2008)
clock offset is 1.0901 msec, root delay is 7.06 msec
root dispersion is 1.63 msec, peer dispersion is 0.52 msec

Rack16R2#sh ntp ass

address         ref clock     st  when  poll reach  delay  offset    disp
*~192.10.16.254 127.127.7.1       4    49    64  377     7.1    1.09     0.5
* master (synced),# master (unsynced), + selected, – candidate, ~ configured

10.3 NTP

Configure devices in BGP AS 100 for CST -6 (Chicago – Brian McGahan) and devices in AS 200 for PST -8 (Reno – Brian Dennis). 🙂

clock timezone

Rack16R2(config)#clock timezone PST -8
Aug 13 23:38:00.742: %SYS-6-CLOCKUPDATE: System clock has been updated from 23:38:00 UTC Wed Aug 13 2008 to 15:38:00 PST Wed Aug 13 2008, configured from console by console.

Rack16R4(config)#clock timezone CST -6
Aug 13 16:39:06.862: %SYS-6-CLOCKUPDATE: System clock has been updated from 16:39:06 UTC Wed Aug 13 2008 to 10:39:06 CST Wed Aug 13 2008, configured from console by console.

Beware of this bit:

“Configure these devices to reflect the appropriate time zone and daylight savings time configuration.”

That daylight savings time needs to be configured:

clock summer-time

To configure the system to automatically switch to summer time (daylight saving time), use one of the formats of the clock summer-time command in global configuration mode.

Since I’m configuring this in August, the clocks will change to Daylight Savings Time:

Rack16R4(config)#clock summer-time CDT recurring
Aug 13 16:44:06.414: %SYS-6-CLOCKUPDATE: System clock has been updated from 10:44:06 CST Wed Aug 13 2008 to 11:44:06 CDT Wed Aug 13 2008, configured from console by console.

10.4 General Management

“Configure sw3 and sw4 in such a way that they will display the exact time and date of the last restart using the ‘show version’ command.”

One thing to note when addressing this task is that sw3 and sw4 are NOT configured for NTP. Does this task require turning NTP on for these devices?  Yes.

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