Chapter 14 xDSL Profiles Setup
SAM1316-22 User’s Guide
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at time B. If the next cell arrives earlier than time C, it is discarded or tagged for
not complying with the TAT. Time C is calculated based on the CDVT or BT.
Figure 54
TAT, CDVT and BT in Traffic Shaping
14.6 Upstream Policing
Upstream policing is an agreement between the carrier and the subscriber to
regulate the average rate and fluctuations of data transmission coming from the
subscriber's device to the SAM1316-22.
Note: Upstream policing controls incoming (upstream) traffic, not outgoing
(downstream).
The ATM traffic classes and parameters are identical with downstream shaping.
Upstream policing can control the upstream incoming traffic rate on specific PVCs.
Upstream ATM cell traffic that violates the policing profile will be discarded. Traffic
shaping must also be enabled on the subscriber's device in order to use upstream
policing. If a subscriber attempts to enlarge his device's PVC shaping parameters
in order to get more upstream traffic bandwidth, it will violate the SAM1316-22's
upstream policing profile and the traffic will be discarded. Operators can use this
feature to prevent subscribers from changing their device settings.
Note: Traffic shaping must also be enabled on the subscriber's device in order to use
upstream policing.
Note that since the SAM1316-22 uses ATM QoS, if the subscriber device's
upstream shaping rate is larger than the SAM1316-22's upstream policing rate,
some ATM cells will be discarded. In the worst case, none of the Ethernet packets
from the CPE will be able to be reassembled from AAL5, so no packets from the
subscriber's device can be received by the SAM1316-22.
The upstream policing feature can be enabled/disabled per PVC. No matter which
ATM traffic class is used for the PVC's upstream traffic (CBR, VBR, or UBR), the
SAM1316-22 will drop any upstream traffic that violates the specified ATM VC
profile.
Содержание SAM1316-22
Страница 2: ......
Страница 8: ...SAM1316 22 User s Guide 8...
Страница 26: ...SAM1316 22 User s Guide 26 Index 459...
Страница 27: ...27 PART I User s Guide...
Страница 28: ...28...
Страница 32: ...Chapter 1 Getting to Know the SAM1316 22 SAM1316 22 User s Guide 32...
Страница 35: ...Chapter 2 Installing and Removing the SAM1316 22 SAM1316 22 User s Guide 35...
Страница 36: ...Chapter 2 Installing and Removing the SAM1316 22 SAM1316 22 User s Guide 36...
Страница 43: ...43 PART II Technical Reference...
Страница 44: ...44...
Страница 74: ...Chapter 7 System Information SAM1316 22 User s Guide 74...
Страница 122: ...Chapter 14 xDSL Profiles Setup SAM1316 22 User s Guide 122...
Страница 128: ...Chapter 15 xDSL Line Data SAM1316 22 User s Guide 128...
Страница 152: ...Chapter 18 IGMP SAM1316 22 User s Guide 152...
Страница 164: ...Chapter 21 Filtering SAM1316 22 User s Guide 164...
Страница 174: ...Chapter 23 Spanning Tree Protocol SAM1316 22 User s Guide 174...
Страница 180: ...Chapter 24 Port Authentication SAM1316 22 User s Guide 180...
Страница 188: ...Chapter 26 DHCP Relay SAM1316 22 User s Guide 188...
Страница 202: ...Chapter 28 2684 Routed Mode SAM1316 22 User s Guide 202...
Страница 212: ...Chapter 30 DSCP SAM1316 22 User s Guide 212...
Страница 224: ...Chapter 32 ACL SAM1316 22 User s Guide 224...
Страница 228: ...Chapter 34 Syslog SAM1316 22 User s Guide 228...
Страница 236: ...Chapter 35 Access Control SAM1316 22 User s Guide 236...
Страница 242: ...Chapter 37 Maximum MTU Size SAM1316 22 User s Guide 242...
Страница 246: ...Chapter 38 PVC Upstream Limit SAM1316 22 User s Guide 246...
Страница 260: ...Chapter 41 Alarm SAM1316 22 User s Guide 260...
Страница 270: ...Chapter 44 MAC Table SAM1316 22 User s Guide 270...
Страница 332: ...Chapter 50 IEEE 802 1Q Tagged VLAN Commands SAM1316 22 User s Guide 332...
Страница 356: ...Chapter 52 IGMP Commands SAM1316 22 User s Guide 356...
Страница 364: ...Chapter 54 OUI Filter Commands SAM1316 22 User s Guide 364...
Страница 368: ...Chapter 55 Packet Filter Commands SAM1316 22 User s Guide 368...
Страница 374: ...Chapter 56 IP Commands SAM1316 22 User s Guide 374...
Страница 384: ...Chapter 58 SNMP SAM1316 22 User s Guide 384...
Страница 428: ...Chapter 60 Virtual Channel Management SAM1316 22 User s Guide 428...
Страница 444: ...Chapter 62 Troubleshooting SAM1316 22 User s Guide 444...
Страница 454: ...Chapter 63 Specifications SAM1316 22 User s Guide 454...
Страница 458: ...SAM1316 22 User s Guide 458...