multicast helper-map & using sla on 3560/3550

From: Joseph Brunner (joe@affirmedsystems.com)
Date: Mon Nov 05 2007 - 20:32:45 ART


For those of you like me who love to play with this puppy I found that

A 3560 and a 3550 do a nice job of sending both broadcast and multicast
sla's.

 

As many of you know different IOS versions seem to be a tard doing
multicast/broadcast ios sla's, but the Lab Cats work like a champ!

 

Here is a 3560 sending multicast sla's

 

ip sla 1

 udp-echo 224.2.2.2 2000 source-ip 1.1.11.11 source-port 2000 control
disable

 timeout 6

 frequency 2

ip sla schedule 1 life forever start-time now

 

 

And a 3550 doing broadcast sla's

 

ip sla 1

 udp-echo 255.255.255.255 2000 source-ip 1.1.13.3 source-port 2000 control
disable

 timeout 6

 frequency 2

ip sla schedule 1 life forever start-time now

 

and yeah, its working.

 

(another switch)

 

rack1sw2#

08:40:56: FIBipv4-packet-proc: route packet from FastEthernet0/22 src
1.1.11.11 dst 255.255.255.255

08:40:56: FIBfwd-proc: Default:255.255.255.255/32 receive entry

08:40:56: FIBipv4-packet-proc: packet routing failed

08:40:56: IP: s=1.1.11.11 (FastEthernet0/22), d=255.255.255.255, len 44,
rcvd 2

08:40:56: UDP src=2000, dst=2000

08:40:56: IP: s=1.1.11.11 (FastEthernet0/22), d=255.255.255.255, len 44,
stop process pak for forus packet

08:40:56: UDP src=2000, dst=2000

 

So my little router's get to change these broadcasts to multicasts and
multicasts to broadcast all they want without turning on rip broadcasts,
etc.

I did one of each sla on each type of switch. good all around.

 

-Joe



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