From: Bob Sinclair (bsin@erols.com)
Date: Tue Sep 24 2002 - 17:28:35 GMT-3
Guys:
My custom queueing config works beautifully over hdlc, but when I make the link Frame and use a map-class with the same queue-list, things don't come out so neatly.
I am using the built-in ttcp program to generate traffic. It will fill-out as much bandwidth as it is offered (within limits). ttcp appears to send packets of size 556 bytes.
I have two sources, one on network 172.16.6.0, and one on network 172.16.11.0. former on 10Mbit Ethernet, latter on 16Mbit Token Ring, into R1. R1 has a serial link that is the path to the two destination routers, R3 and R5.
Here is my Queue-list:
queue-list 1 protocol ip 2 list 2
queue-list 1 protocol ip 1 list 1
queue-list 1 default 3
queue-list 1 queue 1 byte-count 1112
queue-list 1 queue 2 byte-count 556
List 1 defines a source address of 172.16.11.0/24 (R4 traffic) and List 2 defines a source address of 172.16.6.0/24 (R6 traffic).
Both streams have to go across R1 S1/0 to get to their destinations. Clockrate on this link is 64000, bandwidth is 64. With HDLC on this link, sho int on R6 E0 shows ouput rate of 22000, and R4 to0 shows ouput rate of 44000, which is exactly what I would hope.
But when the R1 S1/0 link is frame, with one dlci, cir 64000, mincir 64000, bc 8000 and be 0, R4 has output of about 36000 and R6 has an output of 28000, which is not the 2:1 I would hope for.
Could the frame-relay byte-increment be an issue??. I tried a Bc of 4448, to get a byte increment of 556, but to no avail.
Any thoughts appreciated
-Bob
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