From: Pang Gery (pang_gery@yahoo.com.hk)
Date: Thu Feb 13 2003 - 09:43:29 GMT-3
Hi Group,
I have just reviewed the QoS part and make the following brief notes. My focus is on whether the feature take effect with and without congestioin. Could you please help to review and correct me if my concept is wrong?
1.1 Policy-based routing and QoS via BGP
They just classify packets, will not drop packet, and take effect with and w/o congestion.
1.2 CAR
It can classify and drop packet, and take effect with and w/o congestion.
2.1 Priority Queue / Custom Queue Ip RTP / FR RTP / CBWFQ / LLQ
Take effect only when congestion.
2.2 Question: is the bandwidth command used in policy-map of CBWFQ same as the priority command used in LLQ?
My feeling is the bandwidth is used for data and priority is used for real-time traffic like voice. Also, bandwidth sets the minimum amount allocated for 'that traffic' at congestion, when there is no congestion, 'that traffic' can use more available bandwidth.
However, the priority command guarantee the maximum resources for specific traffic whether there is congestion or not.
3. GTS / FRTS
They are not congestion management and will do the shapping with or without congestion.
Am I right?
Thank you very much.
Gery Pang
Yahoo! =l)G/d(%+H=c .I$U<i,y$h&V
http://voicemail.yahoo.com.hk
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