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Configuring Data Center Bridging Features
PFC Configuration Example
The network in this example handles both data and voice traffic. Because the
voice traffic is time sensitive, it requires a higher priority than standard data
traffic. The voice traffic uses VLAN 100 and has an 802.1p priority of 5, which
is mapped to hardware queue 4. IP phones are connected to ports 3, 5, and 10,
so PFC is enabled on these ports with 802.1p priority 5 traffic as no-drop. The
configuration also enables VLAN tagging so that the 802.1p priority is
identified. This example assumes the voice VLAN (VLAN 100) has already
been configured. The administrator may need to perform other configuration
steps to ensure suitable network operation, including configuring the
bandwidth allocation for the drop and no-drop priorities or to enable or
disable the DCBX protocol.
1
Map 802.1p priority 5 to traffic class 4. The following command changes
the priority to traffic class mapping to be one-to-one, based upon the
default switch settings. For lossless service, a priority must be mapped one-
to-one to a traffic class. For more information about traffic classes, see
"Configuring Class-of-Service" on page 1143. For a complete example of
manually configuring a PC81xx switch for iSCSI with PFC, refer to "iSCSI
Optimization Configuration Examples" on page 409.
console#
configure
console(config)#
classofservice dot1p-mapping 5 4
2
Enter Interface Configuration mode for ports 3, 5, and 10, and then enter
Data Center Bridging mode for these ports.
console(config)#
interface range te1/0/3, te1/0/5,
te1/0/10
console(config-if)#
datacenter-bridging
3
Enable PFC and configure traffic marked with 802.1p priority 5 to be
paused rather than dropped when congestion occurs.
console(config-dcb)#
priority-flow-control mode on
console(config-dcb)#
priority-flow-control
priority 5 no-drop
CAUTION:
All ports may be briefly shutdown when modifying either flow
control (FC) or PFC settings. PFC uses a control packet defined in
802.1Qbb and is not compatible with IEEE 802.3 Annex 31B flow
control.
Содержание PowerConnect 8024
Страница 48: ...48 Contents ...
Страница 52: ...52 Introduction ...
Страница 86: ...86 Switch Features ...
Страница 140: ...140 Setting Basic Network Information ...
Страница 178: ...178 Managing a Switch Stack ...
Страница 204: ...204 Configuring Authentication Authorization and Accounting ...
Страница 272: ...272 Managing General System Settings ...
Страница 308: ...308 Configuring SNMP ...
Страница 336: ...336 Managing Images and Files ...
Страница 354: ...354 Auto Image and Configuration Update ...
Страница 385: ...Monitoring Switch Traffic 385 Figure 16 26 Configure Additional Port Mirroring Settings 9 Click Apply ...
Страница 468: ...468 Configuring Port Characteristics ...
Страница 509: ...Configuring Port and System Security 509 Figure 20 12 Configure Port Security Settings 5 Click Apply ...
Страница 512: ...512 Configuring Port and System Security ...
Страница 550: ...550 Configuring Access Control Lists ...
Страница 571: ...Configuring VLANs 571 Figure 22 6 Add Ports to VLAN 4 Click Apply 5 Verify that the ports have been added to the VLAN ...
Страница 580: ...580 Configuring VLANs Figure 22 17 GVRP Port Parameters Table ...
Страница 586: ...586 Configuring VLANs Figure 22 24 Double VLAN Port Parameter Table ...
Страница 618: ...618 Configuring VLANs ...
Страница 631: ...Configuring the Spanning Tree Protocol 631 Figure 23 5 Spanning Tree Global Settings ...
Страница 637: ...Configuring the Spanning Tree Protocol 637 Figure 23 11 RSTP LAG Settings ...
Страница 685: ...Configuring Port Based Traffic Control 685 Figure 25 3 Storm Control 5 Click Apply ...
Страница 776: ...776 Snooping and Inspecting Traffic Figure 27 17 DAI Interface Configuration Summary ...
Страница 790: ...790 Snooping and Inspecting Traffic ...
Страница 797: ...Configuring Link Aggregation 797 To view or edit settings for multiple LAGs click Show All ...
Страница 894: ...894 Configuring DHCP Server Settings ...
Страница 928: ...928 Configuring L2 and L3 Relay Features Figure 34 3 DHCP Relay Interface Summary ...
Страница 955: ...Configuring OSPF and OSPFv3 955 Figure 35 1 OSPF Configuration ...
Страница 1030: ...1030 Configuring OSPF and OSPFv3 ...
Страница 1068: ...1068 Configuring VRRP ...
Страница 1092: ...1092 Configuring IPv6 Routing ...
Страница 1112: ...1112 Configuring DHCPv6 Server and Relay Settings Relay Interface Number Vl100 Relay Remote ID Option Flags ...
Страница 1119: ...Configuring Differentiated Services 1119 Figure 40 5 DiffServ Class Criteria ...
Страница 1126: ...1126 Configuring Differentiated Services Figure 40 14 DiffServ Service Summary ...
Страница 1142: ...1142 Configuring Differentiated Services ...
Страница 1148: ...1148 Configuring Class of Service Figure 41 1 Mapping Table Configuration CoS 802 1P ...
Страница 1160: ...1160 Configuring Class of Service ...
Страница 1164: ...1164 Configuring Auto VoIP Figure 42 2 Auto VoIP Interface Configuration ...
Страница 1230: ...1230 Managing IPv4 and IPv6 Multicast Figure 43 51 DVMRP Next Hop Summary ...
Страница 1256: ...1256 Managing IPv4 and IPv6 Multicast ...
Страница 1266: ...1266 Feature Limitations and Platform Constants ...
Страница 1274: ...1274 System Process Definitions ...
Страница 1294: ...Index 1294 ...