Bandwidth for Multicast Network Map

[runlikeanantelope]

Wondering what users are configuring for Multicast Bandwidth links? If you are tracking Multicast, it is Packets Per Second, not bits per second, so the bandwidth calculation doesn't compute correctly if you are using the default scale.

I Found this conversion tool and a Cisco web page that discusses:

http://ccievault.net/index.php/articles ... 58-bps2pps

http://www.cisco.com/web/about/security ... trics.html


If you follow the conversion tool, and your interface is configured for JUMBO frames with an MTU of 9216, at a Maximum that is saying that a 1GB link should have the following configured:

BANDWIDTH 14563

Assuming 64 bit frames:

BANDWIDTH 2097152

Since any size in between can be sent, what's the correct setting?

I guess the other way to do it is to watch your Multicast PPS and get a baseline, and then alter your scale to change color to what concerns you....even if its not 80% of your bandwidth being consumed.



BTW - a snippit of my Multicast configuration lis below. I'm using Cricket and my Multicast In and Out Data sources are ds4 and ds5:

KEYPOS DEFAULT 915 34 Packets Per Second

SCALE DEFAULT 0 0 0 0 0
SCALE DEFAULT 0 5 153 255 153 pps
SCALE DEFAULT 5 25 204 255 255
SCALE DEFAULT 25 40 255 0 255
SCALE DEFAULT 40 55 153 0 255
SCALE DEFAULT 55 70 255 255 0
SCALE DEFAULT 70 85 255 102 0
SCALE DEFAULT 85 100 255 0 0

SET key_hidepercent_DEFAULT 1

SET rrd_default_in ds4
SET rrd_default_out ds5

# End of global section

# DEFAULT definitions:
NODE DEFAULT
LABEL {node:this:name} {node:this:bandwidth_in:%.2k}%
LABELFONT 411
OVERLIBWIDTH 600
OVERLIBHEIGHT 200
LABELFONTCOLOR contrast
OVERLIBCAPTION CPU Utilization for {node:this:name}
MAXVALUE 100

LINK DEFAULT
OVERLIBWIDTH 600
OVERLIBHEIGHT 200
BWSTYLE angled
BWFONT 208
INBWFORMAT {link:this:bandwidth_in:%0.2k} pps
OUTBWFORMAT {link:this:bandwidth_out:%0.2k} pps
COMMENTFONT 208
COMMENTPOS 50 50
BANDWIDTH 14563

NODE router1
INFOURL https://stats.com/statistics/cricket/gr ... 1;view=cpu
OVERLIBGRAPH https://stats.com/statistics/cricket/mi ... 200;rand=2
TARGET gauge:/data/cricket-data/routers/router1.rrd:ds0:-
POSITION 850 250
SET router_id router1

LINK router1-router2
WIDTH 2
NODES TB1:W Red1:E
ININFOURL https://stats.com/statistics/cricket/gr ... astPackets
OUTINFOURL https://stats.tns.its.psu.edu/statistic ... astPackets
INOVERLIBCAPTION Daily Graph for Router2 to Router1
OUTOVERLIBCAPTION Daily Graph for Router1 to Router2
INOVERLIBGRAPH https://stats.com/statistics/cricket/mi ... 0;rand=559
OUTOVERLIBGRAPH https://stats.com/statistics/cricket/mi ... 0;rand=158
BWLABELPOS 60 40
TARGET gauge:/data/cricket-data/router-interfaces/router1/gigabitethernet7_6.rrd:ds4:ds5

[Howie]

There isn't really a "correct" setting. Choose what pps value you want to show as red, green etc, and then set the BANDWIDTH appropriately.

Generally, the maximum is super-bad, so once you are past there you don't really care how high the flames are...

That's my feeling anyway. So the baseline method is the way I'd go.