From: ccie2be (ccie2be@nyc.rr.com)
Date: Thu Jan 13 2005 - 17:52:44 GMT-3
Greetings Mark,
Thanks for your input. I think you're right (even though I was running BSR,
not auto-rp).
Here are the 2 lines again (for anyone just now seeing this thread).
r1#sh ip pim rp
Group: 225.25.25.25, RP: 150.1.1.1, v2, next RP-reachable in 00:00:47
Group: 232.32.32.32, RP: 150.1.2.2, v2, uptime 01:18:09, expires 00:02:09
Could we summarize why these 2 lines of output are different this way?
The 1st line says, "Me, R1, and RP for group X will send out another
rp-announcement in 47 seconds.
While the 2nd line says, "Me, R1 heard that R2 is RP for group Y. If I don't
get a re-confirmation in 2:09 minutes, I'll
throw out the info."
What do ya think?
Tim
----- Original Message -----
From: Mark Lasarko
To: ccielab@groupstudy.com ; ccie2be@nyc.rr.com
Sent: Thursday, January 13, 2005 12:44 PM
Subject: Re: mcast
Greetings Tim,I believe this indicates the time remaining untilthe router will
send an RP-Reachable message(one minute by default), which would make sensein
this example as on r1 it only applies to the150.1.1.1 address. It's seen on a
router only ifthe router is an RP for that multicast group.I was curious about
the default intervaland I stumbled upon this:"R1 receives the RP-reachable
message for group239.255.0.1 and updates its expiration timer for RP.This
exchange repeats itself once a minute by defaultand refreshes its multicast
forwarding state..."http://www.cisco.com/warp/public/105/57.htmlNow how can we
tweak this?3725_Rt(config)#ip pim send-rp-announce fastEthernet 0/0 scope 1
interval ? <1-16383> number of secondsWith a default of 60?Can someone
confirm this is correct??~M >>> "ccie2be" <ccie2be@nyc.rr.com>
1/12/2005 3:53:05 PM >>>Hi guys,
What does this mean, next RP-reachable in 00:00:47, as shown below?
r1#sh ip pim rp
Group: 225.25.25.25, RP: 150.1.1.1, v2, next RP-reachable in 00:00:47
Group: 232.32.32.32, RP: 150.1.2.2, v2, uptime 01:18:09, expires 00:02:09
I've been having massive problems with the mcast config of iewb lab 15, so
I'm
trying to figure out
how to interpret some of the output from various show commands better.
TIA, Tim
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