RIP v2 SLEEP TIMERS

According to the Cisco Field Manual: Router configuration page 198

" The sleeptime parameter sets the interval in milliseconds for postponing
routing updates in the event of a Flash update."

I have labed it up. It does not seem to work .....

============ THE CONFIG SNIPPET ===============
router rip
  timers basic 30 180 180 30000 ! Sleep timer set to 30 seconds

============ THE DEBUG ======================

000412: *Jun 17 08:41:30.827: RIP: sending v2 update to 10.12.0.1 via
Ethernet3/0 (10.12.0.2)

000413: *Jun 17 08:41:30.831: RIP: build update entries

000414: *Jun 17 08:41:30.831: 10.255.255.2/32 via 0.0.0.0, metric 16, tag
0

000415: *Jun 17 08:41:43.739: %SYS-5-CONFIG_I: Configured from console by
console

000416: *Jun 17 08:41:44.663: %LINK-3-UPDOWN: Interface Loopback0, changed
state to up

000417: *Jun 17 08:41:44.683: RIP: sending v2 flash update to 10.12.0.1 via
Ethernet3/0 (10.12.0.2)

000418: *Jun 17 08:41:44.683: RIP: build flash update entries

000419: *Jun 17 08:41:44.683: 10.255.255.2/32 via 0.0.0.0, metric 1, tag 0

000420: *Jun 17 08:41:45.663: %LINEPROTO-5-UPDOWN: Line protocol on
Interface Loopback0, changed state to up

000421: *Jun 17 08:41:58.551: RIP: received v2 update from 10.12.0.1 on
Ethernet3/0

000422: *Jun 17 08:41:58.551: 10.255.255.0/24 via 0.0.0.0 in 1 hops

000423: *Jun 17 08:41:58.911: RIP: sending v2 update to 10.12.0.1 via
Ethernet3/0 (10.12.0.2)

000424: *Jun 17 08:41:58.915: RIP: build update entries

000425: *Jun 17 08:41:58.915: 10.255.255.2/32 via 0.0.0.0, metric 1, tag 0

============ OBSERVATIONS =========================

The first update SEQ 00412 is sent at 8:41:30 so the next update would be
expected at 8:42:00 plus or minus 5 seconds as per RFC. At 08.41:44 I bring
up a loopback, which create a flash update (SEQ 000417). I would expect the
regular update to be postponed till around 08:42:14 because of the sleep
timer set to 30 seconds But looking at SEQ 000423 it is clear that the
setting does nothing ...

===================== THE QUESTIONS ==============================

Note that the "sleeptime" option is not documented in the command reference
for RIP, but it is there for IGRP.

Also Doyle (Routing TCP/IP vol 1) indicates that it is an IGRP timer only
... but the option is available on the command line and one Cisco book
mention it as a valid RIP timer...

Not sure what to make of it...

The question has already been asked before but does not seem to have been
answered:

http://www.groupstudy.com/archives/ccielab/200209/msg00712.html

Thanks

Pierrea

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Received on Thu Jun 17 2010 - 09:47:58 ART