From: Stefan Grey (examplebrain@hotmail.com)
Date: Sun Aug 28 2005 - 15:11:14 GMT-3
Hello group,
The question is next. Below is two tasks which sound very similar for me.
Why for the first one the GTS is choosed and for second the police cir (two
rate policer).
1. Recently an Ethernet drophas been installed in your network as a new
connection to the Internet. this link terminates at a public peering point,
and is used to connect to both BB2 and BB3. Although the interface that R5
is using to connect to these upstream peers is a 10Mbps Ehternet connection,
the provisioned rates for these circuits are much lower. BB2 will only allow
R5 to send traffic across this link at a maximum of 2.5 Mbps. BB3 will only
allow R5 to send traffic into its network at a maximum rate of 3Mbps.
Configure R5 to conform to these provisioned rates.
part of the sollution:
policy 2.5 Mbps
class class-default
shape average 2500000
2. As preventative maintenance agains DoS attacks being launched from your
network, your security team has requested that you limit all Icmp traffic to
a max 16Kbps when implementing your QoS policy out to BB2 and BB3.
Configure R5 to reflect this policy.
part of the sollution:
policy-map POLICE_ICMP
class ICMP
police cir 16000
The question is very general indeed. Whe I and probably candidates read such
Qos questions to Identify which solution should be choosed only couple of
words is critical:
Traffic should be limited to 16 Mbps for example. Which solution should be
choosed.
What is the difference in action of GTS and two rate policer??? Sure this
are different features?? But do they differ when the task is to limit the
traffic to some Mbps.
HOw differ the following commands??
police cir 16000
and shape average 250000.
Thanks to everyone who will contiribute to this questions. I really already
read many about this features. But still can't get the difference
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