[c-nsp] CEF and multicast on a 3750

[Nick Hilliard]

On 26/06/2012 16:25, Phil Mayers wrote:
> It might be interesting to capture the MPEG data using a "real" tap i.e.
> physical fibre tap, proper copper tap, and look at the inter-packet spacing
> *before* it goes into the switch.

This is pretty good advice.  You can possibly even do this from the host
servers with tshark, e.g.

# tshark -ni eth0 -q \
	-z io,stat,0.01,ip.addr==192.168.1.1,tcp.port==999 \
	-a duration:60

this will collect stats for 60 seconds, with 0.01 second granularity, and
present the numbers in a table.  If you notice a large variance in the
second and third columns then you're probably running into microburst
territory.

Nick