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Portal Page Access Speed for Layer 3 Web Users Connecting to ME60 V6R1 Was Slow

Publication Date:  2013-09-30 Views:  105 Downloads:  0

Issue Description

If more than 300 web users connecting to an ME60 V6R1 accessed web portal, the access speed was low.

Mar  9 2011 00:16:05 JSYC-PC-BAS01-ME60 %%01DEFEND/6/HOSTCARDROPLOG(l)[4976]:Slot=2;DEFEND HOSTCAR drop packets  Slot=2, Carid:1710, Discard_Bytes Low:1084885, Discard_Bytes High:0,discard-threshold:1024

Handling Process

After a Layer 3 web user logged in to the ME60, the ME60 sent all HTTP packets to the CPU. Some PC software, such as 360 and ppstream sent HTTP packets periodically requesting corresponding services. This caused a large number of HTTP packets sent to the CPU. The ME60 had a policy to limit the maximum number of user-side CPU-destined packets in a specified period. The policy was implemented by allocating a HOST-CAR bandwidth by user MAC address. Because the source MAC addresses of Layer 3 web users were the same, over 300 Layer 3 web users shared the same HOST-CAR (128 kbit/s by default). The HTTP packets destined for the CPU exceeded the HOST-CAR bandwidth, and the ME60 discarded some of them, which contained HTTP packets for web authentication. As a result, the portal page access speed was low.

Root Cause



The HOST-CAR was changed to 512 kbit/s.

slot 2

 hostcar cir 512

 undo hostcar drop-rate enable ------Disable the function that the HOST-CAR is automatically changed to 32 kbit/s upon discarding of packets.


It is recommended that a 1.5 kbit/s HOST-CAR bandwidth be deployed for each user. The HOST-CAR bandwidth may be increased based on actual conditions.

This problem is resolved in V6R2C06, which allocates host-car by source MAC+IP, preventing multiple users sharing the same host-car bandwidth.