From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Wed Jul 05 2006 - 16:29:58 ART
Hello,
QoS Gurus, I need your attention please.
I'm having a hard time to understand the values of Normal Burst and Exceed
Burst. I know that those values are in Bytes and that the Token Bucket (same
as Bc+Be) is used as a metaphor to explain how tokens are removed from the
bucket in a relation to a packet size, and also tokens are added to the
bucket every TC.
Also I think that I understand the logic behind the Policing compound and
actual debt algorithm, BTW in Table 1 of this link
http://www.cisco.com/en/US/products/sw/iosswrel/ps5014/products_feature_guid
e_chapter09186a00800ca4f2.html at Pkt 6 the Actual Debt is wrong, it should
be 3 and not 2 as the description says. Also that the Token measurement
method in Class Based Policing separate token buckets for burst-normal and
burst-max and that in the legacy configuration (car) single token bucket for
burst-normal and burst-max (definitions of RFC 2697 and 2698)
but I got stuck in the implementation and interpretation :S
For example yesterday I lab something really stupid, Running RIP in all
interfaces (so reachability is not a problem here)
Lo0- R3 .. serial .. R1 ----- Ethernet ---- R2
I changed the point-to-point circuit clock rate to different values for
testing, and I did a ping with different packet sizes from R2 to R3 lo0, and
also applied at R1 a rate-limiter with different values, but I could not
interpret the values showed show int XX rate, I saw packets fragmented, I
saw different values for the rate, I got frustrated.
Is there any ordered way to test this and finally understand it
I think that an example using ping with different sizes and with different
policing values would be very helpful, is there any link out there with
that, or I'm asking to much, if so please sorry for the spam
I mean I can not afford to buy more books, because my budget is in 0 now, so
please if you do not mind, shed a light here.
Thanks
Victor.-
PS:
I do not understand well yet what the Word Burst means (in Spanish is
something really different of what you can think, is like killing someone
:D),
This archive was generated by hypermail 2.1.4 : Tue Aug 01 2006 - 07:13:46 ART