From: Kenneth Wygand (KWygand@customonline.com)
Date: Tue May 25 2004 - 17:52:19 GMT-3
If your traffic is periodically bursty, you may be sending at the line
rate (or way above your CIR) for individual Tc's and then not sending
anything for other Tc's while your Bc bucket is overflowing with tokens.
The value you are seeing on your HSSI interface is a statistical average
over time (30 seconds by default I believe)... try increasing your Tc
value and seeing if your drops decrease. Make your Tc value a VERY high
value (like 30 x CIR so a time interval is truly 30 seconds which is the
same interval as per your interface speed output)... note though that if
you hit your maximum allowed at any time during that 30 second interval,
all traffic will wait until the next Tc interval (up to 30 seconds)
before more traffic can be sent (which should not happen based on your
findings of the counters on the HSSI interface)... just make sure you
don't test this while the environment is in production!!!
Good luck,
Kenneth E. Wygand
Systems Engineer, Project Services
CISSP #37102, CCNP, CCDP, ACSP, Cisco IPT Design Specialist, MCP, CNA,
Network+, A+
Custom Computer Specialists, Inc.
"The only unattainable goal is the one not attempted."
-Anonymous
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Vazman@aol.com
Sent: Tuesday, May 25, 2004 4:33 PM
To: ccielab@groupstudy.com
Subject: Frame-relay bytes delayed
I am seeing a lot of bytes delayed and packets delayed when I do a "sh
traffic-shape stat"
Topology is as follows:
Hub (hssi)--FR--(serial) Remote
Hub side has a 6 Mb port speed and remote side has a port speed of 1536K
There are 10 remote sites connected to the FR cloud, either directly to
the Nortel passports or via a T1.
All PVC's have a guaranteed rate of 1536K with no bursting.
I have FRTS configured only on the hub side as follows:
int hssi1/0.1
ip add x.x.x.x 255.255.255.252
bandwidth 1536
frame-relay class T1
frame-relay interface-dlci 200
map-class frame-relay T1
frame-relay adaptive-shaping becn
frame-relay cir 1536000
frame-relay bc 192000
frame-relay be 0
frame-relay mincir 1536000
Sh int hssi1/0 showa input rate as 1160K and output rate as 600K but the
bytes/packets delay are still incrementing.
Any suggestions?
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